1CMAKE-VARIABLES(7)                   CMake                  CMAKE-VARIABLES(7)
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3
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NAME

6       cmake-variables - CMake Variables Reference
7
8       This  page documents variables that are provided by CMake or have mean‐
9       ing to CMake when set by project code.
10
11       For general information on variables, see the Variables section in  the
12       cmake-language manual.
13

VARIABLES THAT PROVIDE INFORMATION

15   CMAKE_AR
16       Name of archiving tool for static libraries.
17
18       This  specifies  the name of the program that creates archive or static
19       libraries.
20
21   CMAKE_ARGC
22       Number of command line arguments passed to CMake in script mode.
23
24       When run in -P script mode, CMake sets this variable to the  number  of
25       command line arguments.  See also CMAKE_ARGV0, 1, 2 
26
27   CMAKE_ARGV0
28       Command line argument passed to CMake in script mode.
29
30       When  run in -P script mode, CMake sets this variable to the first com‐
31       mand line argument.  It then also sets CMAKE_ARGV1, CMAKE_ARGV2, …  and
32       so  on,  up  to  the  number of command line arguments given.  See also
33       CMAKE_ARGC.
34
35   CMAKE_BINARY_DIR
36       The path to the top level of the build tree.
37
38       This is the full path to the top level of the current CMake build tree.
39       For an in-source build, this would be the same as CMAKE_SOURCE_DIR.
40
41       When  run in -P script mode, CMake sets the variables CMAKE_BINARY_DIR,
42       CMAKE_SOURCE_DIR, CMAKE_CURRENT_BINARY_DIR and CMAKE_CURRENT_SOURCE_DIR
43       to the current working directory.
44
45   CMAKE_BUILD_TOOL
46       This variable exists only for backwards compatibility.  It contains the
47       same value as CMAKE_MAKE_PROGRAM.  Use that variable instead.
48
49   CMAKE_CACHEFILE_DIR
50       The directory with the CMakeCache.txt file.
51
52       This is the full path to the directory that has the CMakeCache.txt file
53       in it.  This is the same as CMAKE_BINARY_DIR.
54
55   CMAKE_CACHE_MAJOR_VERSION
56       Major version of CMake used to create the CMakeCache.txt file
57
58       This  stores  the  major  version  of CMake used to write a CMake cache
59       file.  It is only different when a different version of CMake is run on
60       a previously created cache file.
61
62   CMAKE_CACHE_MINOR_VERSION
63       Minor version of CMake used to create the CMakeCache.txt file
64
65       This  stores  the  minor  version  of CMake used to write a CMake cache
66       file.  It is only different when a different version of CMake is run on
67       a previously created cache file.
68
69   CMAKE_CACHE_PATCH_VERSION
70       Patch version of CMake used to create the CMakeCache.txt file
71
72       This  stores  the  patch  version  of CMake used to write a CMake cache
73       file.  It is only different when a different version of CMake is run on
74       a previously created cache file.
75
76   CMAKE_CFG_INTDIR
77       Build-time reference to per-configuration output subdirectory.
78
79       For  native  build  systems  supporting  multiple configurations in the
80       build tree (such as Visual Studio Generators and Xcode), the value is a
81       reference  to a build-time variable specifying the name of the per-con‐
82       figuration output subdirectory.  On Makefile Generators this  evaluates
83       to  . because there is only one configuration in a build tree.  Example
84       values:
85
86          $(ConfigurationName) = Visual Studio 9
87          $(Configuration)     = Visual Studio 10
88          $(CONFIGURATION)     = Xcode
89          .                    = Make-based tools
90
91       Since these values are evaluated by the native build system, this vari‐
92       able  is  suitable only for use in command lines that will be evaluated
93       at build time.  Example of intended usage:
94
95          add_executable(mytool mytool.c)
96          add_custom_command(
97            OUTPUT out.txt
98            COMMAND ${CMAKE_CURRENT_BINARY_DIR}/${CMAKE_CFG_INTDIR}/mytool
99                    ${CMAKE_CURRENT_SOURCE_DIR}/in.txt out.txt
100            DEPENDS mytool in.txt
101            )
102          add_custom_target(drive ALL DEPENDS out.txt)
103
104       Note that CMAKE_CFG_INTDIR is no longer necessary for this purpose  but
105       has  been  left  for  compatibility  with  existing  projects.  Instead
106       add_custom_command() recognizes executable target names in its  COMMAND
107       option,  so  ${CMAKE_CURRENT_BINARY_DIR}/${CMAKE_CFG_INTDIR}/mytool can
108       be replaced by just mytool.
109
110       This variable is read-only.  Setting  it  is  undefined  behavior.   In
111       multi-configuration  build systems the value of this variable is passed
112       as the value of preprocessor symbol CMAKE_INTDIR to the compilation  of
113       all source files.
114
115   CMAKE_COMMAND
116       The full path to the cmake(1) executable.
117
118       This  is the full path to the CMake executable cmake(1) which is useful
119       from custom commands that want to use the cmake -E option for  portable
120       system commands.  (e.g.  /usr/local/bin/cmake)
121
122   CMAKE_CPACK_COMMAND
123       Full path to cpack(1) command installed with CMake.
124
125       This  is the full path to the CPack executable cpack(1) which is useful
126       from custom commands that want to use the cmake(1) -E option for porta‐
127       ble system commands.
128
129   CMAKE_CROSSCOMPILING
130       Intended to indicate whether CMake is cross compiling, but note limita‐
131       tions discussed below.
132
133       This variable will be set to true by  CMake  if  the  CMAKE_SYSTEM_NAME
134       variable  has been set manually (i.e. in a toolchain file or as a cache
135       entry from the cmake command line). In  most  cases,  manually  setting
136       CMAKE_SYSTEM_NAME will only be done when cross compiling, since it will
137       otherwise be given the same value as CMAKE_HOST_SYSTEM_NAME if not man‐
138       ually  set,  which  is correct for the non-cross-compiling case. In the
139       event that CMAKE_SYSTEM_NAME is manually  set  to  the  same  value  as
140       CMAKE_HOST_SYSTEM_NAME,  then CMAKE_CROSSCOMPILING will still be set to
141       true.
142
143       Another case to be aware of is that builds  targeting  Apple  platforms
144       other  than macOS are handled differently to other cross compiling sce‐
145       narios. Rather than relying on CMAKE_SYSTEM_NAME to select  the  target
146       platform,  Apple  device  builds  use  CMAKE_OSX_SYSROOT  to select the
147       appropriate SDK, which indirectly determines the target platform.  Fur‐
148       thermore, when using the Xcode generator, developers can switch between
149       device and simulator builds at build time rather than having  a  single
150       choice  at configure time, so the concept of whether the build is cross
151       compiling or not is more complex. Therefore, the use of CMAKE_CROSSCOM‐
152       PILING is not recommended for projects targeting Apple devices.
153
154   CMAKE_CROSSCOMPILING_EMULATOR
155       This  variable  is only used when CMAKE_CROSSCOMPILING is on. It should
156       point to a command on the host system that can run executable built for
157       the target system.
158
159       If  this  variable  contains a semicolon-separated list, then the first
160       value is the command and remaining values are its arguments.
161
162       The command will be used to run try_run() generated executables,  which
163       avoids manual population of the TryRunResults.cmake file.
164
165       It  is  also  used as the default value for the CROSSCOMPILING_EMULATOR
166       target property of executables.
167
168   CMAKE_CTEST_COMMAND
169       Full path to ctest(1) command installed with CMake.
170
171       This is the full path to the CTest executable ctest(1) which is  useful
172       from custom commands that want to use the cmake(1) -E option for porta‐
173       ble system commands.
174
175   CMAKE_CURRENT_BINARY_DIR
176       The path to the binary directory currently being processed.
177
178       This the full path to the build directory that is currently being  pro‐
179       cessed  by cmake.  Each directory added by add_subdirectory() will cre‐
180       ate a binary directory in the build tree, and as it is being  processed
181       this  variable  will  be set.  For in-source builds this is the current
182       source directory being processed.
183
184       When run in -P script mode, CMake sets the variables  CMAKE_BINARY_DIR,
185       CMAKE_SOURCE_DIR, CMAKE_CURRENT_BINARY_DIR and CMAKE_CURRENT_SOURCE_DIR
186       to the current working directory.
187
188   CMAKE_CURRENT_LIST_DIR
189       Full directory of the listfile currently being processed.
190
191       As CMake processes the listfiles in your  project  this  variable  will
192       always  be  set  to the directory where the listfile which is currently
193       being processed (CMAKE_CURRENT_LIST_FILE) is located.   The  value  has
194       dynamic  scope.  When CMake starts processing commands in a source file
195       it sets this variable to the directory  where  this  file  is  located.
196       When  CMake  finishes processing commands from the file it restores the
197       previous value.  Therefore the value of the variable inside a macro  or
198       function is the directory of the file invoking the bottom-most entry on
199       the call stack, not the directory of the file containing the  macro  or
200       function definition.
201
202       See also CMAKE_CURRENT_LIST_FILE.
203
204   CMAKE_CURRENT_LIST_FILE
205       Full path to the listfile currently being processed.
206
207       As  CMake  processes  the  listfiles in your project this variable will
208       always be set to the one currently  being  processed.   The  value  has
209       dynamic  scope.  When CMake starts processing commands in a source file
210       it sets this variable to the location of the file.  When CMake finishes
211       processing  commands  from  the  file  it  restores the previous value.
212       Therefore the value of the variable inside a macro or function  is  the
213       file  invoking  the  bottom-most  entry on the call stack, not the file
214       containing the macro or function definition.
215
216       See also CMAKE_PARENT_LIST_FILE.
217
218   CMAKE_CURRENT_LIST_LINE
219       The line number of the current file being processed.
220
221       This is the line number of the file currently being processed by cmake.
222
223   CMAKE_CURRENT_SOURCE_DIR
224       The path to the source directory currently being processed.
225
226       This the full path to the source directory that is currently being pro‐
227       cessed by cmake.
228
229       When  run in -P script mode, CMake sets the variables CMAKE_BINARY_DIR,
230       CMAKE_SOURCE_DIR, CMAKE_CURRENT_BINARY_DIR and CMAKE_CURRENT_SOURCE_DIR
231       to the current working directory.
232
233   CMAKE_DIRECTORY_LABELS
234       Specify labels for the current directory.
235
236       This is used to initialize the LABELS directory property.
237
238   CMAKE_DL_LIBS
239       Name of library containing dlopen and dlclose.
240
241       The name of the library that has dlopen and dlclose in it, usually -ldl
242       on most UNIX machines.
243
244   CMAKE_DOTNET_TARGET_FRAMEWORK_VERSION
245       Default value for DOTNET_TARGET_FRAMEWORK_VERSION property of targets.
246
247       This variable is used to initialize the DOTNET_TARGET_FRAMEWORK_VERSION
248       property on all targets. See that target property for additional infor‐
249       mation.
250
251       Setting CMAKE_DOTNET_TARGET_FRAMEWORK_VERSION  may  be  necessary  when
252       working  with C# and newer .NET framework versions to avoid referencing
253       errors with the ALL_BUILD CMake target.
254
255       This variable is only evaluated for Visual Studio  Generators  VS  2010
256       and above.
257
258   CMAKE_EDIT_COMMAND
259       Full path to cmake-gui(1) or ccmake(1).  Defined only for Makefile Gen‐
260       erators when not using an “extra” generator for an IDE.
261
262       This is the full path to the CMake executable that can graphically edit
263       the cache.  For example, cmake-gui(1) or ccmake(1).
264
265   CMAKE_EXECUTABLE_SUFFIX
266       The suffix for executables on this platform.
267
268       The suffix to use for the end of an executable filename if any, .exe on
269       Windows.
270
271       CMAKE_EXECUTABLE_SUFFIX_<LANG> overrides this for language <LANG>.
272
273   CMAKE_EXTRA_GENERATOR
274       The extra generator used  to  build  the  project.   See  cmake-genera‐
275       tors(7).
276
277       When  using  the Eclipse, CodeBlocks, CodeLite, Kate or Sublime genera‐
278       tors, CMake  generates  Makefiles  (CMAKE_GENERATOR)  and  additionally
279       project  files for the respective IDE.  This IDE project file generator
280       is stored in CMAKE_EXTRA_GENERATOR (e.g.  Eclipse CDT4).
281
282   CMAKE_EXTRA_SHARED_LIBRARY_SUFFIXES
283       Additional suffixes for shared libraries.
284
285       Extensions  for  shared  libraries  other  than   that   specified   by
286       CMAKE_SHARED_LIBRARY_SUFFIX,  if  any.   CMake  uses  this to recognize
287       external shared library files during analysis of libraries linked by  a
288       target.
289
290   CMAKE_FIND_PACKAGE_NAME
291       Defined  by  the  find_package() command while loading a find module to
292       record the caller-specified package name.   See  command  documentation
293       for details.
294
295   CMAKE_FIND_PACKAGE_SORT_DIRECTION
296       The  sorting  direction  used by CMAKE_FIND_PACKAGE_SORT_ORDER.  It can
297       assume one of the following values:
298
299       DEC    Default.  Ordering is done  in  descending  mode.   The  highest
300              folder found will be tested first.
301
302       ASC    Ordering  is  done  in  ascending mode.  The lowest folder found
303              will be tested first.
304
305       If CMAKE_FIND_PACKAGE_SORT_ORDER is not set or  is  set  to  NONE  this
306       variable has no effect.
307
308   CMAKE_FIND_PACKAGE_SORT_ORDER
309       The  default order for sorting packages found using find_package().  It
310       can assume one of the following values:
311
312       NONE   Default.  No attempt is done to sort packages.  The first  valid
313              package found will be selected.
314
315       NAME   Sort packages lexicographically before selecting one.
316
317       NATURAL
318              Sort  packages  using  natural order (see strverscmp(3) manual),
319              i.e. such that contiguous digits are compared as whole numbers.
320
321       Natural sorting can be employed to return the highest version when mul‐
322       tiple  versions  of  the same library are found by find_package().  For
323       example suppose that the following libraries have been found:
324
325       · libX-1.1.0
326
327       · libX-1.2.9
328
329       · libX-1.2.10
330
331       By setting NATURAL order we can select the one with the highest version
332       number libX-1.2.10.
333
334          set(CMAKE_FIND_PACKAGE_SORT_ORDER NATURAL)
335          find_package(libX CONFIG)
336
337       The  sort  direction  can  be  controlled  using  the  CMAKE_FIND_PACK‐
338       AGE_SORT_DIRECTION variable (by default decrescent, e.g. lib-B will  be
339       tested before lib-A).
340
341   CMAKE_GENERATOR
342       The generator used to build the project.  See cmake-generators(7).
343
344       The  name  of  the  generator  that is being used to generate the build
345       files.  (e.g.  Unix Makefiles, Ninja, etc.)
346
347       The value of this variable should never be modified by project code.  A
348       generator  may be selected via the cmake(1) -G option, interactively in
349       cmake-gui(1), or via the CMAKE_GENERATOR environment variable.
350
351   CMAKE_GENERATOR_INSTANCE
352       Generator-specific instance specification provided by user.
353
354       Some CMake generators support selection of an instance  of  the  native
355       build system when multiple instances are available.  If the user speci‐
356       fies an  instance  (e.g.  by  setting  this  cache  entry  or  via  the
357       CMAKE_GENERATOR_INSTANCE  environment  variable),  or  after  a default
358       instance is chosen when a build tree is  first  configured,  the  value
359       will be available in this variable.
360
361       The value of this variable should never be modified by project code.  A
362       toolchain file specified by the CMAKE_TOOLCHAIN_FILE variable may  ini‐
363       tialize  CMAKE_GENERATOR_INSTANCE as a cache entry.  Once a given build
364       tree has been initialized with a particular value  for  this  variable,
365       changing the value has undefined behavior.
366
367       Instance specification is supported only on specific generators:
368
369       · For  the  Visual  Studio 15 2017 generator (and above) this specifies
370         the absolute path to the VS installation directory of the selected VS
371         instance.
372
373       See native build system documentation for allowed instance values.
374
375   CMAKE_GENERATOR_PLATFORM
376       Generator-specific target platform specification provided by user.
377
378       Some CMake generators support a target platform name to be given to the
379       native build system to choose a compiler toolchain.  If the user speci‐
380       fies  a  platform  name  (e.g.  via  the  cmake(1) -A option or via the
381       CMAKE_GENERATOR_PLATFORM environment variable) the value will be avail‐
382       able in this variable.
383
384       The value of this variable should never be modified by project code.  A
385       toolchain file specified by the CMAKE_TOOLCHAIN_FILE variable may  ini‐
386       tialize  CMAKE_GENERATOR_PLATFORM.   Once  a  given build tree has been
387       initialized with a particular value for  this  variable,  changing  the
388       value has undefined behavior.
389
390       Platform specification is supported only on specific generators:
391
392       · For  Visual  Studio  Generators with VS 2005 and above this specifies
393         the target architecture.
394
395       · For Green Hills MULTI this specifies the target architecture.
396
397       See native build system documentation for allowed platform names.
398
399   Visual Studio Platform Selection
400       On Visual Studio Generators the selected platform name is  provided  in
401       the CMAKE_VS_PLATFORM_NAME variable.
402
403   CMAKE_GENERATOR_TOOLSET
404       Native build system toolset specification provided by user.
405
406       Some  CMake  generators  support  a  toolset  specification to tell the
407       native build system how to choose a compiler.  If the user specifies  a
408       toolset  (e.g.  via  the  cmake(1)  -T  option or via the CMAKE_GENERA‐
409       TOR_TOOLSET environment variable) the value will be available  in  this
410       variable.
411
412       The value of this variable should never be modified by project code.  A
413       toolchain file specified by the CMAKE_TOOLCHAIN_FILE variable may  ini‐
414       tialize CMAKE_GENERATOR_TOOLSET.  Once a given build tree has been ini‐
415       tialized with a particular value for this variable, changing the  value
416       has undefined behavior.
417
418       Toolset specification is supported only on specific generators:
419
420       · Visual Studio Generators for VS 2010 and above
421
422       · The Xcode generator for Xcode 3.0 and above
423
424       · The Green Hills MULTI generator
425
426       See native build system documentation for allowed toolset names.
427
428   Visual Studio Toolset Selection
429       The Visual Studio Generators support toolset specification using one of
430       these forms:
431
432       · toolset
433
434       · toolset[,key=value]*
435
436       · key=value[,key=value]*
437
438       The toolset specifies the toolset name.  The selected toolset  name  is
439       provided in the CMAKE_VS_PLATFORM_TOOLSET variable.
440
441       The  key=value  pairs form a comma-separated list of options to specify
442       generator-specific details of the toolset selection.   Supported  pairs
443       are:
444
445       cuda=<version>|<path>
446              Specify  the CUDA toolkit version to use or the path to a stand‐
447              alone CUDA toolkit directory.  Supported by VS 2010  and  above.
448              The  version  can only be used with the CUDA toolkit VS integra‐
449              tion globally installed.  See the CMAKE_VS_PLATFORM_TOOLSET_CUDA
450              and CMAKE_VS_PLATFORM_TOOLSET_CUDA_CUSTOM_DIR variables.
451
452       host=<arch>
453              Specify the host tools architecture as x64 or x86.  Supported by
454              VS    2013    and     above.      See     the     CMAKE_VS_PLAT‐
455              FORM_TOOLSET_HOST_ARCHITECTURE variable.
456
457       version=<version>
458              Specify  the  toolset  version to use.  Supported by VS 2017 and
459              above  with  the   specified   toolset   installed.    See   the
460              CMAKE_VS_PLATFORM_TOOLSET_VERSION variable.
461
462   CMAKE_IMPORT_LIBRARY_PREFIX
463       The prefix for import libraries that you link to.
464
465       The  prefix  to  use  for the name of an import library if used on this
466       platform.
467
468       CMAKE_IMPORT_LIBRARY_PREFIX_<LANG> overrides this for language <LANG>.
469
470   CMAKE_IMPORT_LIBRARY_SUFFIX
471       The suffix for import libraries that you link to.
472
473       The suffix to use for the end of an import library filename if used  on
474       this platform.
475
476       CMAKE_IMPORT_LIBRARY_SUFFIX_<LANG> overrides this for language <LANG>.
477
478   CMAKE_JOB_POOL_COMPILE
479       This  variable  is  used to initialize the JOB_POOL_COMPILE property on
480       all the targets. See JOB_POOL_COMPILE for additional information.
481
482   CMAKE_JOB_POOL_LINK
483       This variable is used to initialize the JOB_POOL_LINK property  on  all
484       the targets. See JOB_POOL_LINK for additional information.
485
486   CMAKE_JOB_POOLS
487       If the JOB_POOLS global property is not set, the value of this variable
488       is used in its place.  See JOB_POOLS for additional information.
489
490   CMAKE_<LANG>_COMPILER_AR
491       A wrapper around ar adding the appropriate --plugin option for the com‐
492       piler.
493
494       See also CMAKE_AR.
495
496   CMAKE_<LANG>_COMPILER_RANLIB
497       A  wrapper around ranlib adding the appropriate --plugin option for the
498       compiler.
499
500       See also CMAKE_RANLIB.
501
502   CMAKE_<LANG>_LINK_LIBRARY_SUFFIX
503       Language-specific suffix for libraries that you link to.
504
505       The suffix to use for the end of a library filename, .lib on Windows.
506
507   CMAKE_LINK_LIBRARY_SUFFIX
508       The suffix for libraries that you link to.
509
510       The suffix to use for the end of a library filename, .lib on Windows.
511
512   CMAKE_LINK_SEARCH_END_STATIC
513       End a link line such that static system libraries are used.
514
515       Some linkers support switches such as -Bstatic and -Bdynamic to  deter‐
516       mine  whether  to  use  static  or  shared libraries for -lXXX options.
517       CMake uses these options to set the link type for libraries whose  full
518       paths are not known or (in some cases) are in implicit link directories
519       for the platform.  By default CMake adds an option at the  end  of  the
520       library  list  (if necessary) to set the linker search type back to its
521       starting type.  This property switches the final linker search type  to
522       -Bstatic regardless of how it started.
523
524       This   variable   is   used   to   initialize   the   target   property
525       LINK_SEARCH_END_STATIC for all targets. If set, it’s value is also used
526       by the try_compile() command.
527
528       See also CMAKE_LINK_SEARCH_START_STATIC.
529
530   CMAKE_LINK_SEARCH_START_STATIC
531       Assume the linker looks for static libraries by default.
532
533       Some  linkers support switches such as -Bstatic and -Bdynamic to deter‐
534       mine whether to use static  or  shared  libraries  for  -lXXX  options.
535       CMake  uses these options to set the link type for libraries whose full
536       paths are not known or (in some cases) are in implicit link directories
537       for  the  platform.  By default the linker search type is assumed to be
538       -Bdynamic at the beginning of the library list.  This property switches
539       the  assumption  to  -Bstatic.   It is intended for use when linking an
540       executable statically (e.g.  with the GNU -static option).
541
542       This   variable   is   used   to   initialize   the   target   property
543       LINK_SEARCH_START_STATIC  for  all targets.  If set, it’s value is also
544       used by the try_compile() command.
545
546       See also CMAKE_LINK_SEARCH_END_STATIC.
547
548   CMAKE_MAJOR_VERSION
549       First version number component of the CMAKE_VERSION variable.
550
551   CMAKE_MAKE_PROGRAM
552       Tool that can launch the native build system.  The  value  may  be  the
553       full  path  to an executable or just the tool name if it is expected to
554       be in the PATH.
555
556       The tool selected depends on the CMAKE_GENERATOR used to configure  the
557       project:
558
559       · The  Makefile Generators set this to make, gmake, or a generator-spe‐
560         cific tool (e.g. nmake for NMake Makefiles).
561
562         These generators store CMAKE_MAKE_PROGRAM in the CMake cache so  that
563         it may be edited by the user.
564
565       · The Ninja generator sets this to ninja.
566
567         This  generator  stores CMAKE_MAKE_PROGRAM in the CMake cache so that
568         it may be edited by the user.
569
570       · The Xcode generator sets this to xcodebuild.
571
572         This generator prefers to lookup the build tool at build time  rather
573         than  to  store  CMAKE_MAKE_PROGRAM in the CMake cache ahead of time.
574         This is because xcodebuild is easy to find.
575
576         For compatibility with versions of CMake prior to 3.2, if a  user  or
577         project  explicitly  adds  CMAKE_MAKE_PROGRAM to the CMake cache then
578         CMake will use the specified value.
579
580       · The Visual Studio Generators set this to the full path to MSBuild.exe
581         (VS >= 10), devenv.com (VS 7,8,9), or VCExpress.exe (VS Express 8,9).
582         (See also variables CMAKE_VS_MSBUILD_COMMAND and CMAKE_VS_DEVENV_COM‐
583         MAND.
584
585         These generators prefer to lookup the build tool at build time rather
586         than to store CMAKE_MAKE_PROGRAM in the CMake cache  ahead  of  time.
587         This  is  because  the  tools are version-specific and can be located
588         using the Windows Registry.  It is also necessary because the  proper
589         build  tool may depend on the project content (e.g. the Intel Fortran
590         plugin to VS 10 and 11  requires  devenv.com  to  build  its  .vfproj
591         project  files  even though MSBuild.exe is normally preferred to sup‐
592         port the CMAKE_GENERATOR_TOOLSET).
593
594         For compatibility with versions of CMake prior to 3.0, if a  user  or
595         project  explicitly  adds  CMAKE_MAKE_PROGRAM to the CMake cache then
596         CMake will use the specified value if possible.
597
598       · The Green Hills MULTI  generator  sets  this  to  the  full  path  to
599         gbuild.exe(Windows)  or  gbuild(Linux)  based  upon the toolset being
600         used.
601
602         Once the generator has initialized a particular value for this  vari‐
603         able, changing the value has undefined behavior.
604
605       The  CMAKE_MAKE_PROGRAM  variable  is set for use by project code.  The
606       value  is  also   used   by   the   cmake(1)   --build   and   ctest(1)
607       --build-and-test tools to launch the native build process.
608
609   CMAKE_MATCH_COUNT
610       The number of matches with the last regular expression.
611
612       When a regular expression match is used, CMake fills in CMAKE_MATCH_<n>
613       variables with the  match  contents.   The  CMAKE_MATCH_COUNT  variable
614       holds the number of match expressions when these are filled.
615
616   CMAKE_MATCH_<n>
617       Capture  group <n> matched by the last regular expression, for groups 0
618       through 9.  Group 0 is the entire match.  Groups 1 through  9  are  the
619       subexpressions captured by () syntax.
620
621       When a regular expression match is used, CMake fills in CMAKE_MATCH_<n>
622       variables with the  match  contents.   The  CMAKE_MATCH_COUNT  variable
623       holds the number of match expressions when these are filled.
624
625   CMAKE_MESSAGE_INDENT
626       The message() command joins the strings from this list and for log lev‐
627       els of NOTICE and below, it prepends the resultant string to each  line
628       of the message.
629
630       Example:
631
632          list(APPEND listVar one two three)
633
634          message(VERBOSE [[Collected items in the "listVar":]])
635          list(APPEND CMAKE_MESSAGE_INDENT "  ")
636
637          foreach(item IN LISTS listVar)
638            message(VERBOSE ${item})
639          endforeach()
640
641          list(POP_BACK CMAKE_MESSAGE_INDENT)
642          message(VERBOSE "No more indent")
643
644       Which results in the following output:
645
646          -- Collected items in the "listVar":
647          --   one
648          --   two
649          --   three
650          -- No more indent
651
652   CMAKE_MINIMUM_REQUIRED_VERSION
653       The  <min>  version  of  CMake  given  to  the  most recent call to the
654       cmake_minimum_required(VERSION) command.
655
656   CMAKE_MINOR_VERSION
657       Second version number component of the CMAKE_VERSION variable.
658
659   CMAKE_NETRC
660       This variable is used to initialize the NETRC option for file(DOWNLOAD)
661       and  file(UPLOAD)  commands  and  the module ExternalProject. See those
662       commands for additional information.
663
664       The local option takes precedence over this variable.
665
666   CMAKE_NETRC_FILE
667       This  variable  is  used  to  initialize  the  NETRC_FILE  option   for
668       file(DOWNLOAD)  and  file(UPLOAD)  commands and the module ExternalPro‐
669       ject. See those commands for additional information.
670
671       The local option takes precedence over this variable.
672
673   CMAKE_PARENT_LIST_FILE
674       Full path to the CMake file that included the current one.
675
676       While processing a CMake file loaded  by  include()  or  find_package()
677       this variable contains the full path to the file including it.  The top
678       of the include stack is  always  the  CMakeLists.txt  for  the  current
679       directory.  See also CMAKE_CURRENT_LIST_FILE.
680
681   CMAKE_PATCH_VERSION
682       Third version number component of the CMAKE_VERSION variable.
683
684   CMAKE_PROJECT_DESCRIPTION
685       The description of the top level project.
686
687       This  variable holds the description of the project as specified in the
688       top level CMakeLists.txt file by a project()  command.   In  the  event
689       that  the  top  level CMakeLists.txt contains multiple project() calls,
690       the most recently called one from that top  level  CMakeLists.txt  will
691       determine the value that CMAKE_PROJECT_DESCRIPTION contains.  For exam‐
692       ple, consider the following top level CMakeLists.txt:
693
694          cmake_minimum_required(VERSION 3.0)
695          project(First DESCRIPTION "I am First")
696          project(Second DESCRIPTION "I am Second")
697          add_subdirectory(sub)
698          project(Third DESCRIPTION "I am Third")
699
700       And sub/CMakeLists.txt with the following contents:
701
702          project(SubProj DESCRIPTION "I am SubProj")
703          message("CMAKE_PROJECT_DESCRIPTION = ${CMAKE_PROJECT_DESCRIPTION}")
704
705       The most recently seen project() command  from  the  top  level  CMake‐
706       Lists.txt would be project(Second ...), so this will print:
707
708          CMAKE_PROJECT_DESCRIPTION = I am Second
709
710       To obtain the description from the most recent call to project() in the
711       current directory scope or above, see the PROJECT_DESCRIPTION variable.
712
713   CMAKE_PROJECT_HOMEPAGE_URL
714       The homepage URL of the top level project.
715
716       This variable holds the homepage URL of the project as specified in the
717       top  level  CMakeLists.txt  file  by a project() command.  In the event
718       that the top level CMakeLists.txt contains  multiple  project()  calls,
719       the  most  recently  called one from that top level CMakeLists.txt will
720       determine the  value  that  CMAKE_PROJECT_HOMEPAGE_URL  contains.   For
721       example, consider the following top level CMakeLists.txt:
722
723          cmake_minimum_required(VERSION 3.0)
724          project(First HOMEPAGE_URL "http://first.example.com")
725          project(Second HOMEPAGE_URL "http://second.example.com")
726          add_subdirectory(sub)
727          project(Third HOMEPAGE_URL "http://third.example.com")
728
729       And sub/CMakeLists.txt with the following contents:
730
731          project(SubProj HOMEPAGE_URL "http://subproj.example.com")
732          message("CMAKE_PROJECT_HOMEPAGE_URL = ${CMAKE_PROJECT_HOMEPAGE_URL}")
733
734       The  most  recently  seen  project()  command from the top level CMake‐
735       Lists.txt would be project(Second ...), so this will print:
736
737          CMAKE_PROJECT_HOMEPAGE_URL = http://second.example.com
738
739       To obtain the homepage URL from the most recent call  to  project()  in
740       the  current  directory  scope  or  above, see the PROJECT_HOMEPAGE_URL
741       variable.
742
743   CMAKE_PROJECT_NAME
744       The name of the top level project.
745
746       This variable holds the name of the project as  specified  in  the  top
747       level  CMakeLists.txt  file  by a project() command.  In the event that
748       the top level CMakeLists.txt contains  multiple  project()  calls,  the
749       most recently called one from that top level CMakeLists.txt will deter‐
750       mine the name that CMAKE_PROJECT_NAME contains.  For example,  consider
751       the following top level CMakeLists.txt:
752
753          cmake_minimum_required(VERSION 3.0)
754          project(First)
755          project(Second)
756          add_subdirectory(sub)
757          project(Third)
758
759       And sub/CMakeLists.txt with the following contents:
760
761          project(SubProj)
762          message("CMAKE_PROJECT_NAME = ${CMAKE_PROJECT_NAME}")
763
764       The  most  recently  seen  project()  command from the top level CMake‐
765       Lists.txt would be project(Second), so this will print:
766
767          CMAKE_PROJECT_NAME = Second
768
769       To obtain the name from the most recent call to project() in  the  cur‐
770       rent directory scope or above, see the PROJECT_NAME variable.
771
772   CMAKE_PROJECT_VERSION
773       The version of the top level project.
774
775       This  variable holds the version of the project as specified in the top
776       level CMakeLists.txt file by a project() command.  In  the  event  that
777       the  top  level  CMakeLists.txt  contains multiple project() calls, the
778       most recently called one from that top level CMakeLists.txt will deter‐
779       mine  the value that CMAKE_PROJECT_VERSION contains.  For example, con‐
780       sider the following top level CMakeLists.txt:
781
782          cmake_minimum_required(VERSION 3.0)
783          project(First VERSION 1.2.3)
784          project(Second VERSION 3.4.5)
785          add_subdirectory(sub)
786          project(Third VERSION 6.7.8)
787
788       And sub/CMakeLists.txt with the following contents:
789
790          project(SubProj VERSION 1)
791          message("CMAKE_PROJECT_VERSION = ${CMAKE_PROJECT_VERSION}")
792
793       The most recently seen project() command  from  the  top  level  CMake‐
794       Lists.txt would be project(Second ...), so this will print:
795
796          CMAKE_PROJECT_VERSION = 3.4.5
797
798       To  obtain  the  version  from the most recent call to project() in the
799       current directory scope or above, see the PROJECT_VERSION variable.
800
801   CMAKE_PROJECT_VERSION_MAJOR
802       The major version of the top level project.
803
804       This variable holds the major version of the project  as  specified  in
805       the  top  level  CMakeLists.txt file by a project() command. Please see
806       CMAKE_PROJECT_VERSION documentation  for  the  behavior  when  multiple
807       project() commands are used in the sources.
808
809   CMAKE_PROJECT_VERSION_MINOR
810       The minor version of the top level project.
811
812       This  variable  holds  the minor version of the project as specified in
813       the top level CMakeLists.txt file by a project()  command.  Please  see
814       CMAKE_PROJECT_VERSION  documentation  for  the  behavior  when multiple
815       project() commands are used in the sources.
816
817   CMAKE_PROJECT_VERSION_PATCH
818       The patch version of the top level project.
819
820       This variable holds the patch version of the project  as  specified  in
821       the  top  level  CMakeLists.txt file by a project() command. Please see
822       CMAKE_PROJECT_VERSION documentation  for  the  behavior  when  multiple
823       project() commands are used in the sources.
824
825   CMAKE_PROJECT_VERSION_TWEAK
826       The tweak version of the top level project.
827
828       This  variable  holds  the tweak version of the project as specified in
829       the top level CMakeLists.txt file by a project()  command.  Please  see
830       CMAKE_PROJECT_VERSION  documentation  for  the  behavior  when multiple
831       project() commands are used in the sources.
832
833   CMAKE_RANLIB
834       Name of randomizing tool for static libraries.
835
836       This specifies name of the program that randomizes libraries  on  UNIX,
837       not used on Windows, but may be present.
838
839   CMAKE_ROOT
840       Install directory for running cmake.
841
842       This  is  the install root for the running CMake and the Modules direc‐
843       tory can be  found  here.   This  is  commonly  used  in  this  format:
844       ${CMAKE_ROOT}/Modules
845
846   CMAKE_RULE_MESSAGES
847       Specify whether to report a message for each make rule.
848
849       If set in the cache it is used to initialize the value of the RULE_MES‐
850       SAGES property.  Users may disable the option in their local build tree
851       to  disable  granular messages and report only as each target completes
852       in Makefile builds.
853
854   CMAKE_SCRIPT_MODE_FILE
855       Full path to the cmake(1) -P script file currently being processed.
856
857       When run in cmake(1) -P script mode, CMake sets this  variable  to  the
858       full  path  of the script file.  When run to configure a CMakeLists.txt
859       file, this variable is not set.
860
861   CMAKE_SHARED_LIBRARY_PREFIX
862       The prefix for shared libraries that you link to.
863
864       The prefix to use for the name of a shared library, lib on UNIX.
865
866       CMAKE_SHARED_LIBRARY_PREFIX_<LANG> overrides this for language <LANG>.
867
868   CMAKE_SHARED_LIBRARY_SUFFIX
869       The suffix for shared libraries that you link to.
870
871       The suffix to use for the end of a shared  library  filename,  .dll  on
872       Windows.
873
874       CMAKE_SHARED_LIBRARY_SUFFIX_<LANG> overrides this for language <LANG>.
875
876   CMAKE_SHARED_MODULE_PREFIX
877       The prefix for loadable modules that you link to.
878
879       The prefix to use for the name of a loadable module on this platform.
880
881       CMAKE_SHARED_MODULE_PREFIX_<LANG> overrides this for language <LANG>.
882
883   CMAKE_SHARED_MODULE_SUFFIX
884       The suffix for shared libraries that you link to.
885
886       The  suffix  to  use  for the end of a loadable module filename on this
887       platform
888
889       CMAKE_SHARED_MODULE_SUFFIX_<LANG> overrides this for language <LANG>.
890
891   CMAKE_SIZEOF_VOID_P
892       Size of a void pointer.
893
894       This is set to the size of a pointer on  the  target  machine,  and  is
895       determined  by  a  try  compile.   If  a 64-bit size is found, then the
896       library search path is modified to look for 64-bit libraries first.
897
898   CMAKE_SKIP_INSTALL_RULES
899       Whether to disable generation of installation rules.
900
901       If TRUE, CMake will neither generate installation  rules  nor  will  it
902       generate cmake_install.cmake files. This variable is FALSE by default.
903
904   CMAKE_SKIP_RPATH
905       If true, do not add run time path information.
906
907       If this is set to TRUE, then the rpath information is not added to com‐
908       piled executables.  The default is to  add  rpath  information  if  the
909       platform  supports  it.   This  allows  for easy running from the build
910       tree.  To omit RPATH in the install step, but not the build  step,  use
911       CMAKE_SKIP_INSTALL_RPATH instead.
912
913   CMAKE_SOURCE_DIR
914       The path to the top level of the source tree.
915
916       This  is  the  full  path  to the top level of the current CMake source
917       tree.   For  an  in-source  build,  this   would   be   the   same   as
918       CMAKE_BINARY_DIR.
919
920       When  run in -P script mode, CMake sets the variables CMAKE_BINARY_DIR,
921       CMAKE_SOURCE_DIR, CMAKE_CURRENT_BINARY_DIR and CMAKE_CURRENT_SOURCE_DIR
922       to the current working directory.
923
924   CMAKE_STATIC_LIBRARY_PREFIX
925       The prefix for static libraries that you link to.
926
927       The prefix to use for the name of a static library, lib on UNIX.
928
929       CMAKE_STATIC_LIBRARY_PREFIX_<LANG> overrides this for language <LANG>.
930
931   CMAKE_STATIC_LIBRARY_SUFFIX
932       The suffix for static libraries that you link to.
933
934       The  suffix  to  use  for the end of a static library filename, .lib on
935       Windows.
936
937       CMAKE_STATIC_LIBRARY_SUFFIX_<LANG> overrides this for language <LANG>.
938
939   CMAKE_Swift_MODULE_DIRECTORY
940       Swift module output directory.
941
942       This variable is used to initialise the Swift_MODULE_DIRECTORY property
943       on  all  the  targets.  See the target property for additional informa‐
944       tion.
945
946   CMAKE_Swift_NUM_THREADS
947       Number of threads for parallel compilation for Swift targets.
948
949       This variable controls the number  of  parallel  jobs  that  the  swift
950       driver creates for building targets.  If not specified, it will default
951       to the number of logical CPUs on the host.
952
953   CMAKE_TOOLCHAIN_FILE
954       Path to toolchain file supplied to cmake(1).
955
956       This variable is specified on the  command  line  when  cross-compiling
957       with  CMake.  It is the path to a file which is read early in the CMake
958       run and which specifies locations for compilers  and  toolchain  utili‐
959       ties, and other target platform and compiler related information.
960
961   CMAKE_TWEAK_VERSION
962       Defined  to  0 for compatibility with code written for older CMake ver‐
963       sions that may have defined higher values.
964
965       NOTE:
966          In CMake versions 2.8.2 through  2.8.12,  this  variable  holds  the
967          fourth version number component of the CMAKE_VERSION variable.
968
969   CMAKE_VERBOSE_MAKEFILE
970       Enable verbose output from Makefile builds.
971
972       This  variable is a cache entry initialized (to FALSE) by the project()
973       command.  Users may enable the option in their local build tree to  get
974       more  verbose output from Makefile builds and show each command line as
975       it is launched.
976
977   CMAKE_VERSION
978       The CMake version string as three non-negative integer components sepa‐
979       rated by . and possibly followed by - and other information.  The first
980       two components represent the feature level and the third component rep‐
981       resents either a bug-fix level or development date.
982
983       Release  versions  and release candidate versions of CMake use the for‐
984       mat:
985
986          <major>.<minor>.<patch>[-rc<n>]
987
988       where the <patch> component is less than  20000000.   Development  ver‐
989       sions of CMake use the format:
990
991          <major>.<minor>.<date>[-<id>]
992
993       where  the  <date> component is of format CCYYMMDD and <id> may contain
994       arbitrary text.  This represents development as of  a  particular  date
995       following the <major>.<minor> feature release.
996
997       Individual component values are also available in variables:
998
999       · CMAKE_MAJOR_VERSION
1000
1001       · CMAKE_MINOR_VERSION
1002
1003       · CMAKE_PATCH_VERSION
1004
1005       · CMAKE_TWEAK_VERSION
1006
1007       Use the if() command VERSION_LESS, VERSION_GREATER, VERSION_EQUAL, VER‐
1008       SION_LESS_EQUAL, or VERSION_GREATER_EQUAL operators to compare  version
1009       string  values against CMAKE_VERSION using a component-wise test.  Ver‐
1010       sion component values may be 10 or larger so do not attempt to  compare
1011       version strings as floating-point numbers.
1012
1013       NOTE:
1014          CMake  versions  2.8.2  through 2.8.12 used three components for the
1015          feature level.  Release versions represented the bug-fix level in  a
1016          fourth  component,  i.e.  <major>.<minor>.<patch>[.<tweak>][-rc<n>].
1017          Development versions represented the development date in the  fourth
1018          component, i.e. <major>.<minor>.<patch>.<date>[-<id>].
1019
1020          CMake  versions prior to 2.8.2 used three components for the feature
1021          level and had  no  bug-fix  component.   Release  versions  used  an
1022          even-valued             second            component,            i.e.
1023          <major>.<even-minor>.<patch>[-rc<n>].  Development versions used  an
1024          odd-valued  second  component with the development date as the third
1025          component, i.e. <major>.<odd-minor>.<date>.
1026
1027          The CMAKE_VERSION variable is defined by  CMake  2.6.3  and  higher.
1028          Earlier versions defined only the individual component variables.
1029
1030   CMAKE_VS_DEVENV_COMMAND
1031       The  generators for Visual Studio 9 2008 and above set this variable to
1032       the devenv.com command installed with the corresponding  Visual  Studio
1033       version.  Note that this variable may be empty on Visual Studio Express
1034       editions because they do not provide this tool.
1035
1036       This variable is not defined by other generators even if devenv.com  is
1037       installed on the computer.
1038
1039       The CMAKE_VS_MSBUILD_COMMAND is also provided for Visual Studio 10 2010
1040       and above.  See also the CMAKE_MAKE_PROGRAM variable.
1041
1042   CMAKE_VS_MSBUILD_COMMAND
1043       The generators for Visual Studio 10 2010 and above set this variable to
1044       the  MSBuild.exe command installed with the corresponding Visual Studio
1045       version.
1046
1047       This variable is not defined by other generators even if MSBuild.exe is
1048       installed on the computer.
1049
1050       The  CMAKE_VS_DEVENV_COMMAND  is also provided for the non-Express edi‐
1051       tions of Visual Studio.  See also the CMAKE_MAKE_PROGRAM variable.
1052
1053   CMAKE_VS_NsightTegra_VERSION
1054       When using a Visual Studio generator with the  CMAKE_SYSTEM_NAME  vari‐
1055       able  set  to Android, this variable contains the version number of the
1056       installed NVIDIA Nsight Tegra Visual Studio Edition.
1057
1058   CMAKE_VS_PLATFORM_NAME
1059       Visual Studio target platform name used by the current generator.
1060
1061       VS 8 and above allow project files to specify a target platform.  CMake
1062       provides  the  name  of  the chosen platform in this variable.  See the
1063       CMAKE_GENERATOR_PLATFORM variable for details.
1064
1065       See also the CMAKE_VS_PLATFORM_NAME_DEFAULT variable.
1066
1067   CMAKE_VS_PLATFORM_NAME_DEFAULT
1068       Default for the Visual Studio target platform name for the current gen‐
1069       erator  without  considering  the value of the CMAKE_GENERATOR_PLATFORM
1070       variable.  For Visual Studio Generators for VS 2017 and below  this  is
1071       always  Win32.   For  VS 2019 and above this is based on the host plat‐
1072       form.
1073
1074       See also the CMAKE_VS_PLATFORM_NAME variable.
1075
1076   CMAKE_VS_PLATFORM_TOOLSET
1077       Visual Studio Platform Toolset name.
1078
1079       VS 10 and above use MSBuild under the hood and  support  multiple  com‐
1080       piler toolchains.  CMake may specify a toolset explicitly, such as v110
1081       for VS 11 or Windows7.1SDK for 64-bit support in VS 10 Express.   CMake
1082       provides the name of the chosen toolset in this variable.
1083
1084       See the CMAKE_GENERATOR_TOOLSET variable for details.
1085
1086   CMAKE_VS_PLATFORM_TOOLSET_CUDA
1087       NVIDIA CUDA Toolkit version whose Visual Studio toolset to use.
1088
1089       The Visual Studio Generators for VS 2010 and above support using a CUDA
1090       toolset provided by a CUDA Toolkit.  The toolset version number may  be
1091       specified  by  a field in CMAKE_GENERATOR_TOOLSET of the form cuda=8.0.
1092       Or it is automatically detected if a path to a standalone  CUDA  direc‐
1093       tory  is specified in the form cuda=C:\path\to\cuda.  If none is speci‐
1094       fied CMake will choose a default version.  CMake provides the  selected
1095       CUDA  toolset  version  in this variable.  The value may be empty if no
1096       CUDA Toolkit with Visual Studio integration is installed.
1097
1098   CMAKE_VS_PLATFORM_TOOLSET_CUDA_CUSTOM_DIR
1099       Path to standalone NVIDIA CUDA Toolkit (eg. extracted from installer).
1100
1101       The Visual Studio Generators for VS 2010  and  above  support  using  a
1102       standalone (non-installed) NVIDIA CUDA toolkit.  The path may be speci‐
1103       fied   by   a   field   in   CMAKE_GENERATOR_TOOLSET   of   the    form
1104       cuda=C:\path\to\cuda.   The  given  directory  must  at least contain a
1105       folder .\nvcc and must provide Visual Studio integration files in  path
1106       .\CUDAVisualStudioIntegration\extras\            visual_studio_integra‐
1107       tion\MSBuildExtensions\. One  can  create  a  standalone  CUDA  toolkit
1108       directory  by either opening a installer with 7zip or copying the files
1109       that are extracted by the running installer.  The value may be empty if
1110       no path to a standalone CUDA Toolkit was specified.
1111
1112   CMAKE_VS_PLATFORM_TOOLSET_HOST_ARCHITECTURE
1113       Visual Studio preferred tool architecture.
1114
1115       The Visual Studio Generators for VS 2013 and above support using either
1116       the 32-bit or 64-bit  host  toolchains  by  specifying  a  host=x86  or
1117       host=x64  value  in the CMAKE_GENERATOR_TOOLSET option.  CMake provides
1118       the selected toolchain architecture preference in this  variable  (x86,
1119       x64, or empty).
1120
1121   CMAKE_VS_PLATFORM_TOOLSET_VERSION
1122       Visual Studio Platform Toolset version.
1123
1124       The  Visual  Studio  Generators  for  VS 2017 and above allow to select
1125       minor versions of the same toolset. The toolset version number  may  be
1126       specified  by  a  field  in  CMAKE_GENERATOR_TOOLSET  of  the form ver‐
1127       sion=14.11. If none is specified CMake will choose a  default  toolset.
1128       The value may be empty if no minor version was selected and the default
1129       is used.
1130
1131   CMAKE_VS_WINDOWS_TARGET_PLATFORM_VERSION
1132       Visual Studio Windows Target Platform Version.
1133
1134       When targeting Windows 10 and above Visual Studio 2015 and  above  sup‐
1135       port  specification of a target Windows version to select a correspond‐
1136       ing SDK.  The CMAKE_SYSTEM_VERSION variable may be  set  to  specify  a
1137       version.   Otherwise CMake computes a default version based on the Win‐
1138       dows SDK versions available.  The chosen Windows target version  number
1139       is provided in CMAKE_VS_WINDOWS_TARGET_PLATFORM_VERSION.  If no Windows
1140       10 SDK is available this value will be empty.
1141
1142       One may set a  CMAKE_WINDOWS_KITS_10_DIR  environment  variable  to  an
1143       absolute  path  to  tell  CMake to look for Windows 10 SDKs in a custom
1144       location.    The   specified   directory   is   expected   to   contain
1145       Include/10.0.* directories.
1146
1147   CMAKE_XCODE_GENERATE_SCHEME
1148       If  enabled, the Xcode generator will generate schema files.  These are
1149       useful to invoke analyze, archive, build-for-testing and  test  actions
1150       from the command line.
1151
1152       This  variable initializes the XCODE_GENERATE_SCHEME target property on
1153       all targets.
1154
1155   CMAKE_XCODE_PLATFORM_TOOLSET
1156       Xcode compiler selection.
1157
1158       Xcode supports selection of  a  compiler  from  one  of  the  installed
1159       toolsets.   CMake provides the name of the chosen toolset in this vari‐
1160       able, if any is explicitly selected (e.g.  via the cmake(1) -T option).
1161
1162   <PROJECT-NAME>_BINARY_DIR
1163       Top level binary directory for the named project.
1164
1165       A variable is created with the name used in the project() command,  and
1166       is  the  binary  directory  for  the  project.  This can be useful when
1167       add_subdirectory() is used to connect several projects.
1168
1169   <PROJECT-NAME>_DESCRIPTION
1170       Value given to the DESCRIPTION option of the most recent  call  to  the
1171       project() command with project name <PROJECT-NAME>, if any.
1172
1173   <PROJECT-NAME>_HOMEPAGE_URL
1174       Value  given  to the HOMEPAGE_URL option of the most recent call to the
1175       project() command with project name <PROJECT-NAME>, if any.
1176
1177   <PROJECT-NAME>_SOURCE_DIR
1178       Top level source directory for the named project.
1179
1180       A variable is created with the name used in the project() command,  and
1181       is  the  source  directory  for  the  project.  This can be useful when
1182       add_subdirectory() is used to connect several projects.
1183
1184   <PROJECT-NAME>_VERSION
1185       Value given to the VERSION option  of  the  most  recent  call  to  the
1186       project() command with project name <PROJECT-NAME>, if any.
1187
1188       See  also  the  component-wise  version  variables  <PROJECT-NAME>_VER‐
1189       SION_MAJOR, <PROJECT-NAME>_VERSION_MINOR, <PROJECT-NAME>_VERSION_PATCH,
1190       and <PROJECT-NAME>_VERSION_TWEAK.
1191
1192   <PROJECT-NAME>_VERSION_MAJOR
1193       First  version  number component of the <PROJECT-NAME>_VERSION variable
1194       as set by the project() command.
1195
1196   <PROJECT-NAME>_VERSION_MINOR
1197       Second version number component of the <PROJECT-NAME>_VERSION  variable
1198       as set by the project() command.
1199
1200   <PROJECT-NAME>_VERSION_PATCH
1201       Third  version  number component of the <PROJECT-NAME>_VERSION variable
1202       as set by the project() command.
1203
1204   <PROJECT-NAME>_VERSION_TWEAK
1205       Fourth version number component of the <PROJECT-NAME>_VERSION  variable
1206       as set by the project() command.
1207
1208   PROJECT_BINARY_DIR
1209       Full path to build directory for project.
1210
1211       This is the binary directory of the most recent project() command.
1212
1213   PROJECT_DESCRIPTION
1214       Short project description given to the project command.
1215
1216       This  is  the  description  given to the most recently called project()
1217       command in the  current  directory  scope  or  above.   To  obtain  the
1218       description of the top level project, see the CMAKE_PROJECT_DESCRIPTION
1219       variable.
1220
1221   PROJECT_HOMEPAGE_URL
1222       The homepage URL of the project.
1223
1224       This is the homepage URL given to the most  recently  called  project()
1225       command  in  the current directory scope or above.  To obtain the home‐
1226       page URL of the top level project, see  the  CMAKE_PROJECT_HOMEPAGE_URL
1227       variable.
1228
1229   PROJECT_NAME
1230       Name of the project given to the project command.
1231
1232       This is the name given to the most recently called project() command in
1233       the current directory scope or above.  To obtain the name  of  the  top
1234       level project, see the CMAKE_PROJECT_NAME variable.
1235
1236   PROJECT_SOURCE_DIR
1237       Top level source directory for the current project.
1238
1239       This is the source directory of the most recent project() command.
1240
1241   PROJECT_VERSION
1242       Value  given  to  the  VERSION  option  of  the most recent call to the
1243       project() command, if any.
1244
1245       See also the component-wise  version  variables  PROJECT_VERSION_MAJOR,
1246       PROJECT_VERSION_MINOR,    PROJECT_VERSION_PATCH,    and    PROJECT_VER‐
1247       SION_TWEAK.
1248
1249   PROJECT_VERSION_MAJOR
1250       First version number component of the PROJECT_VERSION variable  as  set
1251       by the project() command.
1252
1253   PROJECT_VERSION_MINOR
1254       Second  version number component of the PROJECT_VERSION variable as set
1255       by the project() command.
1256
1257   PROJECT_VERSION_PATCH
1258       Third version number component of the PROJECT_VERSION variable  as  set
1259       by the project() command.
1260
1261   PROJECT_VERSION_TWEAK
1262       Fourth  version number component of the PROJECT_VERSION variable as set
1263       by the project() command.
1264

VARIABLES THAT CHANGE BEHAVIOR

1266   BUILD_SHARED_LIBS
1267       Global flag to cause add_library() to create shared libraries if on.
1268
1269       If present and true, this will cause all libraries to be  built  shared
1270       unless  the  library  was  explicitly  added as a static library.  This
1271       variable is often added to projects as an option() so that each user of
1272       a  project can decide if they want to build the project using shared or
1273       static libraries.
1274
1275   CMAKE_ABSOLUTE_DESTINATION_FILES
1276       List of files which have been installed using an  ABSOLUTE  DESTINATION
1277       path.
1278
1279       This   variable   is  defined  by  CMake-generated  cmake_install.cmake
1280       scripts.  It can be used (read-only) by programs or scripts that source
1281       those  install  scripts.   This  is used by some CPack generators (e.g.
1282       RPM).
1283
1284   CMAKE_APPBUNDLE_PATH
1285       Semicolon-separated list of directories specifying a  search  path  for
1286       macOS  application  bundles  used by the find_program(), and find_pack‐
1287       age() commands.
1288
1289   CMAKE_AUTOMOC_RELAXED_MODE
1290       Deprecated since version 3.15.
1291
1292
1293       Switch between strict and relaxed automoc mode.
1294
1295       By default, AUTOMOC behaves exactly as described in  the  documentation
1296       of  the  AUTOMOC  target  property.   When set to TRUE, it accepts more
1297       input and tries to find the correct input file for moc even if it  dif‐
1298       fers  from the documented behaviour.  In this mode it e.g.  also checks
1299       whether a header file is  intended  to  be  processed  by  moc  when  a
1300       "foo.moc" file has been included.
1301
1302       Relaxed mode has to be enabled for KDE4 compatibility.
1303
1304   CMAKE_BACKWARDS_COMPATIBILITY
1305       Deprecated.  See CMake Policy CMP0001 documentation.
1306
1307   CMAKE_BUILD_TYPE
1308       Specifies the build type on single-configuration generators.
1309
1310       This statically specifies what build type (configuration) will be built
1311       in this build tree.  Possible values are empty,  Debug,  Release,  Rel‐
1312       WithDebInfo,  MinSizeRel,  …   This variable is only meaningful to sin‐
1313       gle-configuration generators (such as Makefile  Generators  and  Ninja)
1314       i.e.  those which choose a single configuration when CMake runs to gen‐
1315       erate a build tree as opposed to multi-configuration  generators  which
1316       offer  selection  of the build configuration within the generated build
1317       environment.  There are many per-config properties and variables  (usu‐
1318       ally  following  clean  SOME_VAR_<CONFIG>  order  conventions), such as
1319       CMAKE_C_FLAGS_<CONFIG>,         specified         as         uppercase:
1320       CMAKE_C_FLAGS_[DEBUG|RELEASE|RELWITHDEBINFO|MINSIZEREL|...].  For exam‐
1321       ple, in a build tree configured to build type Debug, CMake will see  to
1322       having CMAKE_C_FLAGS_DEBUG settings get added to the CMAKE_C_FLAGS set‐
1323       tings.  See also CMAKE_CONFIGURATION_TYPES.
1324
1325   CMAKE_CODEBLOCKS_COMPILER_ID
1326       Change the compiler id in the generated CodeBlocks project files.
1327
1328       CodeBlocks  uses  its  own  compiler  id  string  which  differs   from
1329       CMAKE_<LANG>_COMPILER_ID.   If this variable is left empty, CMake tries
1330       to recognize the CodeBlocks compiler id automatically.   Otherwise  the
1331       specified string is used in the CodeBlocks project file.  See the Code‐
1332       Blocks documentation for valid compiler id strings.
1333
1334       Other IDEs like QtCreator that also use the  CodeBlocks  generator  may
1335       ignore this setting.
1336
1337   CMAKE_CODEBLOCKS_EXCLUDE_EXTERNAL_FILES
1338       Change the way the CodeBlocks generator creates project files.
1339
1340       If  this  variable  evaluates  to  ON  the  generator excludes from the
1341       project file any files that are located outside the project root.
1342
1343   CMAKE_CODELITE_USE_TARGETS
1344       Change the way the CodeLite generator creates projectfiles.
1345
1346       If this variable evaluates to ON at the end  of  the  top-level  CMake‐
1347       Lists.txt  file,  the  generator  creates projectfiles based on targets
1348       rather than projects.
1349
1350   CMAKE_COLOR_MAKEFILE
1351       Enables color output when using the Makefile Generators.
1352
1353       When enabled, the generated  Makefiles  will  produce  colored  output.
1354       Default is ON.
1355
1356   CMAKE_CONFIGURATION_TYPES
1357       Specifies the available build types on multi-config generators.
1358
1359       This specifies what build types (configurations) will be available such
1360       as Debug, Release, RelWithDebInfo etc.  This has reasonable defaults on
1361       most  platforms, but can be extended to provide other build types.  See
1362       also CMAKE_BUILD_TYPE for details of managing configuration  data,  and
1363       CMAKE_CFG_INTDIR.
1364
1365   CMAKE_DEBUG_TARGET_PROPERTIES
1366       Enables tracing output for target properties.
1367
1368       This  variable  can  be populated with a list of properties to generate
1369       debug output for when evaluating target properties.  Currently  it  can
1370       only be used when evaluating:
1371
1372       · AUTOUIC_OPTIONS
1373
1374       · COMPILE_DEFINITIONS
1375
1376       · COMPILE_FEATURES
1377
1378       · COMPILE_OPTIONS
1379
1380       · INCLUDE_DIRECTORIES
1381
1382       · LINK_DIRECTORIES
1383
1384       · LINK_OPTIONS
1385
1386       · POSITION_INDEPENDENT_CODE
1387
1388       · SOURCES
1389
1390       target  properties  and  any other property listed in COMPATIBLE_INTER‐
1391       FACE_STRING and other COMPATIBLE_INTERFACE_ properties.  It outputs  an
1392       origin for each entry in the target property.  Default is unset.
1393
1394   CMAKE_DEPENDS_IN_PROJECT_ONLY
1395       When set to TRUE in a directory, the build system produced by the Make‐
1396       file Generators is set up to only consider dependencies on source files
1397       that appear either in the source or in the binary directories.  Changes
1398       to source files outside of these directories will not cause rebuilds.
1399
1400       This should be used carefully in cases  where  some  source  files  are
1401       picked up through external headers during the build.
1402
1403   CMAKE_DISABLE_FIND_PACKAGE_<PackageName>
1404       Variable for disabling find_package() calls.
1405
1406       Every  non-REQUIRED find_package() call in a project can be disabled by
1407       setting the variable CMAKE_DISABLE_FIND_PACKAGE_<PackageName> to  TRUE.
1408       This  can  be  used  to  build  a  project without an optional package,
1409       although that package is installed.
1410
1411       This switch should be used during the initial CMake run.  Otherwise  if
1412       the  package  has already been found in a previous CMake run, the vari‐
1413       ables which have been stored in the cache will still be there.  In that
1414       case  it  is recommended to remove the cache variables for this package
1415       from the cache using the cache editor or cmake(1) -U
1416
1417   CMAKE_ECLIPSE_GENERATE_LINKED_RESOURCES
1418       This cache variable is used by  the  Eclipse  project  generator.   See
1419       cmake-generators(7).
1420
1421       The Eclipse project generator generates so-called linked resources e.g.
1422       to the subproject root dirs in the source tree or to the  source  files
1423       of targets.  This can be disabled by setting this variable to FALSE.
1424
1425   CMAKE_ECLIPSE_GENERATE_SOURCE_PROJECT
1426       This  cache  variable  is  used  by the Eclipse project generator.  See
1427       cmake-generators(7).
1428
1429       If this variable is set to TRUE, the  Eclipse  project  generator  will
1430       generate an Eclipse project in CMAKE_SOURCE_DIR . This project can then
1431       be  used  in  Eclipse  e.g.  for  the  version  control  functionality.
1432       CMAKE_ECLIPSE_GENERATE_SOURCE_PROJECT  defaults to FALSE; so nothing is
1433       written into the source directory.
1434
1435   CMAKE_ECLIPSE_MAKE_ARGUMENTS
1436       This cache variable is used by  the  Eclipse  project  generator.   See
1437       cmake-generators(7).
1438
1439       This  variable  holds arguments which are used when Eclipse invokes the
1440       make tool. By default it is initialized to hold flags to enable  paral‐
1441       lel builds (using -j typically).
1442
1443   CMAKE_ECLIPSE_RESOURCE_ENCODING
1444       This cache variable tells the Eclipse CDT4 project generator to set the
1445       resource encoding to the given value in generated project files.  If no
1446       value is given, no encoding will be set.
1447
1448   CMAKE_ECLIPSE_VERSION
1449       This  cache  variable  is  used  by the Eclipse project generator.  See
1450       cmake-generators(7).
1451
1452       When using the Eclipse project  generator,  CMake  tries  to  find  the
1453       Eclipse  executable and detect the version of it. Depending on the ver‐
1454       sion it finds, some features are enabled or disabled. If CMake  doesn’t
1455       find Eclipse, it assumes the oldest supported version, Eclipse Callisto
1456       (3.2).
1457
1458   CMAKE_ERROR_DEPRECATED
1459       Whether to issue errors for deprecated functionality.
1460
1461       If TRUE, use of deprecated functionality will issue fatal  errors.   If
1462       this variable is not set, CMake behaves as if it were set to FALSE.
1463
1464   CMAKE_ERROR_ON_ABSOLUTE_INSTALL_DESTINATION
1465       Ask  cmake_install.cmake  script  to  error  out as soon as a file with
1466       absolute INSTALL DESTINATION is encountered.
1467
1468       The fatal error is emitted before the  installation  of  the  offending
1469       file   takes   place.    This   variable  is  used  by  CMake-generated
1470       cmake_install.cmake scripts.  If one sets this  variable  to  ON  while
1471       running the script, it may get fatal error messages from the script.
1472
1473   CMAKE_EXECUTE_PROCESS_COMMAND_ECHO
1474       If this variable is set to STDERR, STDOUT or NONE then commands in exe‐
1475       cute_process() calls will be printed to either stderr or stdout or  not
1476       at all.
1477
1478   CMAKE_EXPORT_COMPILE_COMMANDS
1479       Enable/Disable output of compile commands during generation.
1480
1481       If enabled, generates a compile_commands.json file containing the exact
1482       compiler  calls  for  all  translation  units   of   the   project   in
1483       machine-readable form.  The format of the JSON file looks like:
1484
1485          [
1486            {
1487              "directory": "/home/user/development/project",
1488              "command": "/usr/bin/c++ ... -c ../foo/foo.cc",
1489              "file": "../foo/foo.cc"
1490            },
1491
1492            ...
1493
1494            {
1495              "directory": "/home/user/development/project",
1496              "command": "/usr/bin/c++ ... -c ../foo/bar.cc",
1497              "file": "../foo/bar.cc"
1498            }
1499          ]
1500
1501       NOTE:
1502          This  option  is  implemented  only  by  Makefile Generators and the
1503          Ninja.  It is ignored on other generators.
1504
1505          This option currently does not work well  in  combination  with  the
1506          UNITY_BUILD target property or the CMAKE_UNITY_BUILD variable.
1507
1508   CMAKE_EXPORT_PACKAGE_REGISTRY
1509       Enables the export(PACKAGE) command when CMP0090 is set to NEW.
1510
1511       The  export(PACKAGE) command does nothing by default.  In some cases it
1512       is  desirable  to  write  to  the  user  package   registry,   so   the
1513       CMAKE_EXPORT_PACKAGE_REGISTRY variable may be set to enable it.
1514
1515       If  CMP0090  is  not  set  to  NEW  this variable does nothing, and the
1516       CMAKE_EXPORT_NO_PACKAGE_REGISTRY   variable   controls   the   behavior
1517       instead.
1518
1519       See also Disabling the Package Registry.
1520
1521   CMAKE_EXPORT_NO_PACKAGE_REGISTRY
1522       Disable the export(PACKAGE) command when CMP0090 is not set to NEW.
1523
1524       In  some cases, for example for packaging and for system wide installa‐
1525       tions, it is not desirable to write the user package registry.  If  the
1526       CMAKE_EXPORT_NO_PACKAGE_REGISTRY  variable is enabled, the export(PACK‐
1527       AGE) command will do nothing.
1528
1529       If  CMP0090  is  set  to  NEW  this  variable  does  nothing,  and  the
1530       CMAKE_EXPORT_PACKAGE_REGISTRY variable controls the behavior instead.
1531
1532       See also Disabling the Package Registry.
1533
1534   CMAKE_FIND_APPBUNDLE
1535       This variable affects how find_* commands choose between macOS Applica‐
1536       tion Bundles and unix-style package components.
1537
1538       On  Darwin  or  systems  supporting  macOS  Application  Bundles,   the
1539       CMAKE_FIND_APPBUNDLE variable can be set to empty or one of the follow‐
1540       ing:
1541
1542       FIRST  Try to find application bundles before standard programs.   This
1543              is the default on Darwin.
1544
1545       LAST   Try to find application bundles after standard programs.
1546
1547       ONLY   Only try to find application bundles.
1548
1549       NEVER  Never try to find application bundles.
1550
1551   CMAKE_FIND_FRAMEWORK
1552       This  variable  affects how find_* commands choose between macOS Frame‐
1553       works and unix-style package components.
1554
1555       On Darwin or systems supporting macOS Frameworks, the CMAKE_FIND_FRAME‐
1556       WORK variable can be set to empty or one of the following:
1557
1558       FIRST  Try  to  find  frameworks  before standard libraries or headers.
1559              This is the default on Darwin.
1560
1561       LAST   Try to find frameworks after standard libraries or headers.
1562
1563       ONLY   Only try to find frameworks.
1564
1565       NEVER  Never try to find frameworks.
1566
1567   CMAKE_FIND_LIBRARY_CUSTOM_LIB_SUFFIX
1568       Specify a <suffix> to tell the find_library() command to  search  in  a
1569       lib<suffix>  directory before each lib directory that would normally be
1570       searched.
1571
1572       This overrides the behavior of related global properties:
1573
1574       · FIND_LIBRARY_USE_LIB32_PATHS
1575
1576       · FIND_LIBRARY_USE_LIB64_PATHS
1577
1578       · FIND_LIBRARY_USE_LIBX32_PATHS
1579
1580   CMAKE_FIND_LIBRARY_PREFIXES
1581       Prefixes to prepend when looking for libraries.
1582
1583       This  specifies  what  prefixes  to  add  to  library  names  when  the
1584       find_library()  command  looks  for libraries.  On UNIX systems this is
1585       typically lib, meaning that when trying to find the foo library it will
1586       look for libfoo.
1587
1588   CMAKE_FIND_LIBRARY_SUFFIXES
1589       Suffixes to append when looking for libraries.
1590
1591       This  specifies  what  suffixes  to  add  to  library  names  when  the
1592       find_library() command looks for libraries.  On Windows systems this is
1593       typically  .lib  and  .dll,  meaning  that  when trying to find the foo
1594       library it will look for foo.dll etc.
1595
1596   CMAKE_FIND_NO_INSTALL_PREFIX
1597       Exclude the values of the CMAKE_INSTALL_PREFIX and CMAKE_STAGING_PREFIX
1598       variables from CMAKE_SYSTEM_PREFIX_PATH.  CMake adds these project-des‐
1599       tination prefixes to CMAKE_SYSTEM_PREFIX_PATH by default  in  order  to
1600       support  building  a  series  of dependent packages and installing them
1601       into a common prefix.  Set CMAKE_FIND_NO_INSTALL_PREFIX to TRUE to sup‐
1602       press this behavior.
1603
1604       The  CMAKE_SYSTEM_PREFIX_PATH  is  initialized  on  the first call to a
1605       project()  or  enable_language()  command.   Therefore  one  must   set
1606       CMAKE_FIND_NO_INSTALL_PREFIX  before  this  in order to take effect.  A
1607       user may set the variable as a cache  entry  on  the  command  line  to
1608       achieve this.
1609
1610       Note  that the prefix(es) may still be searched for other reasons, such
1611       as being the same prefix as the CMake  installation,  or  for  being  a
1612       built-in system prefix.
1613
1614   CMAKE_FIND_PACKAGE_NO_PACKAGE_REGISTRY
1615       Deprecated  since version 3.16: Use the CMAKE_FIND_USE_PACKAGE_REGISTRY
1616       variable instead.
1617
1618
1619       By default this variable is not set.  If  neither  CMAKE_FIND_USE_PACK‐
1620       AGE_REGISTRY  nor  CMAKE_FIND_PACKAGE_NO_PACKAGE_REGISTRY  is set, then
1621       find_package()  will  use  the  User  Package   Registry   unless   the
1622       NO_CMAKE_PACKAGE_REGISTRY option is provided.
1623
1624       CMAKE_FIND_PACKAGE_NO_PACKAGE_REGISTRY        is       ignored       if
1625       CMAKE_FIND_USE_PACKAGE_REGISTRY is set.
1626
1627       In some cases, for example to locate only system wide installations, it
1628       is  not  desirable  to use the User Package Registry when searching for
1629       packages. If  the  CMAKE_FIND_PACKAGE_NO_PACKAGE_REGISTRY  variable  is
1630       TRUE,  all  the find_package() commands will skip the User Package Reg‐
1631       istry as if they were called with the  NO_CMAKE_PACKAGE_REGISTRY  argu‐
1632       ment.
1633
1634       See also Disabling the Package Registry.
1635
1636   CMAKE_FIND_PACKAGE_NO_SYSTEM_PACKAGE_REGISTRY
1637       Deprecated  since  version  3.16:  Use  the CMAKE_FIND_USE_SYSTEM_PACK‐
1638       AGE_REGISTRY variable instead.
1639
1640
1641       By default this variable is not  set.  If  neither  CMAKE_FIND_USE_SYS‐
1642       TEM_PACKAGE_REGISTRY  nor CMAKE_FIND_PACKAGE_NO_SYSTEM_PACKAGE_REGISTRY
1643       is set, then find_package() will use the System Package Registry unless
1644       the NO_CMAKE_SYSTEM_PACKAGE_REGISTRY option is provided.
1645
1646       CMAKE_FIND_PACKAGE_NO_SYSTEM_PACKAGE_REGISTRY     is     ignored     if
1647       CMAKE_FIND_USE_SYSTEM_PACKAGE_REGISTRY is set.
1648
1649       In some cases, it is not desirable to use the System  Package  Registry
1650       when         searching        for        packages.        If        the
1651       CMAKE_FIND_PACKAGE_NO_SYSTEM_PACKAGE_REGISTRY variable is TRUE, all the
1652       find_package()  commands  will  skip  the System Package Registry as if
1653       they were called with the NO_CMAKE_SYSTEM_PACKAGE_REGISTRY argument.
1654
1655       See also Disabling the Package Registry.
1656
1657   CMAKE_FIND_PACKAGE_PREFER_CONFIG
1658       Tell find_package() to try “Config” mode before  “Module”  mode  if  no
1659       mode was specified.
1660
1661       The  command  find_package() operates without an explicit mode when the
1662       reduced signature is used without the MODULE option. In this  case,  by
1663       default,   CMake   first   tries   Module   mode  by  searching  for  a
1664       Find<pkg>.cmake module.  If it fails, CMake then searches for the pack‐
1665       age using Config mode.
1666
1667       Set  CMAKE_FIND_PACKAGE_PREFER_CONFIG to TRUE to tell find_package() to
1668       first search using Config mode before falling back to Module mode.
1669
1670       This variable may be useful when a developer has compiled a custom ver‐
1671       sion  of a common library and wishes to link it to a dependent project.
1672       If this variable is set to TRUE, it would prevent a dependent project’s
1673       call  to  find_package()  from selecting the default library located by
1674       the system’s Find<pkg>.cmake module before finding the developer’s cus‐
1675       tom built library.
1676
1677       Once  this  variable  is  set, it is the responsibility of the exported
1678       <pkg>Config.cmake files to provide the same  result  variables  as  the
1679       Find<pkg>.cmake  modules so that dependent projects can use them inter‐
1680       changeably.
1681
1682   CMAKE_FIND_PACKAGE_RESOLVE_SYMLINKS
1683       Set to TRUE to tell find_package() calls to resolve symbolic  links  in
1684       the value of <PackageName>_DIR.
1685
1686       This  is helpful in use cases where the package search path points at a
1687       proxy directory in which symlinks to the real package locations appear.
1688       This  is not enabled by default because there are also common use cases
1689       in which the symlinks should be preserved.
1690
1691   CMAKE_FIND_PACKAGE_WARN_NO_MODULE
1692       Tell find_package() to warn if called without an explicit mode.
1693
1694       If find_package() is called without an explicit  mode  option  (MODULE,
1695       CONFIG,  or  NO_MODULE)  and no Find<pkg>.cmake module is in CMAKE_MOD‐
1696       ULE_PATH then CMake implicitly  assumes  that  the  caller  intends  to
1697       search  for  a package configuration file.  If no package configuration
1698       file is found then the wording of the failure message must account  for
1699       both  the case that the package is really missing and the case that the
1700       project has a bug and failed to provide the intended Find  module.   If
1701       instead  the  caller specifies an explicit mode option then the failure
1702       message can be more specific.
1703
1704       Set CMAKE_FIND_PACKAGE_WARN_NO_MODULE to TRUE to tell find_package() to
1705       warn  when  it  implicitly  assumes Config mode.  This helps developers
1706       enforce use of an explicit mode in all calls to find_package() within a
1707       project.
1708
1709       This  variable has no effect if CMAKE_FIND_PACKAGE_PREFER_CONFIG is set
1710       to TRUE.
1711
1712   CMAKE_FIND_ROOT_PATH
1713       Semicolon-separated list of root paths to search on the filesystem.
1714
1715       This variable is most useful when cross-compiling. CMake uses the paths
1716       in  this  list  as  alternative  roots  to  find  filesystem items with
1717       find_package(), find_library() etc.
1718
1719   CMAKE_FIND_ROOT_PATH_MODE_INCLUDE
1720       This variable controls whether the CMAKE_FIND_ROOT_PATH and  CMAKE_SYS‐
1721       ROOT are used by find_file() and find_path().
1722
1723       If  set  to  ONLY,  then only the roots in CMAKE_FIND_ROOT_PATH will be
1724       searched. If set to NEVER, then the roots in CMAKE_FIND_ROOT_PATH  will
1725       be  ignored and only the host system root will be used. If set to BOTH,
1726       then the host system paths and the paths in  CMAKE_FIND_ROOT_PATH  will
1727       be searched.
1728
1729   CMAKE_FIND_ROOT_PATH_MODE_LIBRARY
1730       This  variable controls whether the CMAKE_FIND_ROOT_PATH and CMAKE_SYS‐
1731       ROOT are used by find_library().
1732
1733       If set to ONLY, then only the roots  in  CMAKE_FIND_ROOT_PATH  will  be
1734       searched.  If set to NEVER, then the roots in CMAKE_FIND_ROOT_PATH will
1735       be ignored and only the host system root will be used. If set to  BOTH,
1736       then  the  host system paths and the paths in CMAKE_FIND_ROOT_PATH will
1737       be searched.
1738
1739   CMAKE_FIND_ROOT_PATH_MODE_PACKAGE
1740       This variable controls whether the CMAKE_FIND_ROOT_PATH and  CMAKE_SYS‐
1741       ROOT are used by find_package().
1742
1743       If  set  to  ONLY,  then only the roots in CMAKE_FIND_ROOT_PATH will be
1744       searched. If set to NEVER, then the roots in CMAKE_FIND_ROOT_PATH  will
1745       be  ignored and only the host system root will be used. If set to BOTH,
1746       then the host system paths and the paths in  CMAKE_FIND_ROOT_PATH  will
1747       be searched.
1748
1749   CMAKE_FIND_ROOT_PATH_MODE_PROGRAM
1750       This  variable controls whether the CMAKE_FIND_ROOT_PATH and CMAKE_SYS‐
1751       ROOT are used by find_program().
1752
1753       If set to ONLY, then only the roots  in  CMAKE_FIND_ROOT_PATH  will  be
1754       searched.  If set to NEVER, then the roots in CMAKE_FIND_ROOT_PATH will
1755       be ignored and only the host system root will be used. If set to  BOTH,
1756       then  the  host system paths and the paths in CMAKE_FIND_ROOT_PATH will
1757       be searched.
1758
1759   CMAKE_FIND_USE_CMAKE_ENVIRONMENT_PATH
1760       Controls the default behavior of the following commands for whether  or
1761       not to search paths provided by cmake-specific environment variables:
1762
1763       · find_program()
1764
1765       · find_library()
1766
1767       · find_file()
1768
1769       · find_path()
1770
1771       · find_package()
1772
1773       This is useful in cross-compiling environments.
1774
1775       By default this variable is not set, which is equivalent to it having a
1776       value of TRUE.  Explicit options  given  to  the  above  commands  take
1777       precedence over this variable.
1778
1779       See   also   the  CMAKE_FIND_USE_CMAKE_PATH,  CMAKE_FIND_USE_CMAKE_SYS‐
1780       TEM_PATH,  CMAKE_FIND_USE_SYSTEM_ENVIRONMENT_PATH,  CMAKE_FIND_USE_SYS‐
1781       TEM_PACKAGE_REGISTRY,        CMAKE_FIND_USE_PACKAGE_REGISTRY,       and
1782       CMAKE_FIND_USE_PACKAGE_ROOT_PATH variables.
1783
1784   CMAKE_FIND_USE_CMAKE_PATH
1785       Controls the default behavior of the following commands for whether  or
1786       not to search paths provided by cmake-specific cache variables:
1787
1788       · find_program()
1789
1790       · find_library()
1791
1792       · find_file()
1793
1794       · find_path()
1795
1796       · find_package()
1797
1798       This is useful in cross-compiling environments.
1799
1800       By default this variable is not set, which is equivalent to it having a
1801       value of TRUE.  Explicit options  given  to  the  above  commands  take
1802       precedence over this variable.
1803
1804       See        also        the       CMAKE_FIND_USE_CMAKE_ENVIRONMENT_PATH,
1805       CMAKE_FIND_USE_CMAKE_SYSTEM_PATH,        CMAKE_FIND_USE_SYSTEM_ENVIRON‐
1806       MENT_PATH, CMAKE_FIND_USE_SYSTEM_PACKAGE_REGISTRY, CMAKE_FIND_USE_PACK‐
1807       AGE_REGISTRY, and CMAKE_FIND_USE_PACKAGE_ROOT_PATH variables.
1808
1809   CMAKE_FIND_USE_CMAKE_SYSTEM_PATH
1810       Controls the default behavior of the following commands for whether  or
1811       not to search paths provided by platform-specific cmake variables:
1812
1813       · find_program()
1814
1815       · find_library()
1816
1817       · find_file()
1818
1819       · find_path()
1820
1821       · find_package()
1822
1823       This is useful in cross-compiling environments.
1824
1825       By default this variable is not set, which is equivalent to it having a
1826       value of TRUE.  Explicit options  given  to  the  above  commands  take
1827       precedence over this variable.
1828
1829       See  also  the CMAKE_FIND_USE_CMAKE_PATH, CMAKE_FIND_USE_CMAKE_ENVIRON‐
1830       MENT_PATH, CMAKE_FIND_USE_SYSTEM_ENVIRONMENT_PATH,  CMAKE_FIND_USE_SYS‐
1831       TEM_PACKAGE_REGISTRY,        CMAKE_FIND_USE_PACKAGE_REGISTRY,       and
1832       CMAKE_FIND_USE_PACKAGE_ROOT_PATH variables.
1833
1834   CMAKE_FIND_USE_PACKAGE_REGISTRY
1835       Controls the default behavior of the find_package() command for whether
1836       or not to search paths provided by the User Package Registry.
1837
1838       By  default this variable is not set and the behavior will fall back to
1839       that determined by  the  deprecated  CMAKE_FIND_PACKAGE_NO_PACKAGE_REG‐
1840       ISTRY  variable.  If that is also not set, then find_package() will use
1841       the User Package Registry unless the  NO_CMAKE_PACKAGE_REGISTRY  option
1842       is provided.
1843
1844       This  variable takes precedence over CMAKE_FIND_PACKAGE_NO_PACKAGE_REG‐
1845       ISTRY when both are set.
1846
1847       In some cases, for example to locate only system wide installations, it
1848       is  not  desirable  to use the User Package Registry when searching for
1849       packages.  If the CMAKE_FIND_USE_PACKAGE_REGISTRY  variable  is  FALSE,
1850       all  the find_package() commands will skip the User Package Registry as
1851       if they were called with the NO_CMAKE_PACKAGE_REGISTRY argument.
1852
1853       See    also    Disabling    the    Package     Registry     and     the
1854       CMAKE_FIND_USE_CMAKE_PATH,       CMAKE_FIND_USE_CMAKE_ENVIRONMENT_PATH,
1855       CMAKE_FIND_USE_CMAKE_SYSTEM_PATH,        CMAKE_FIND_USE_SYSTEM_ENVIRON‐
1856       MENT_PATH,          CMAKE_FIND_USE_SYSTEM_PACKAGE_REGISTRY,         and
1857       CMAKE_FIND_USE_PACKAGE_ROOT_PATH variables.
1858
1859   CMAKE_FIND_USE_PACKAGE_ROOT_PATH
1860       Controls the default behavior of the following commands for whether  or
1861       not to search paths provided by <PackageName>_ROOT variables:
1862
1863       · find_program()
1864
1865       · find_library()
1866
1867       · find_file()
1868
1869       · find_path()
1870
1871       · find_package()
1872
1873       By default this variable is not set, which is equivalent to it having a
1874       value of TRUE.  Explicit options  given  to  the  above  commands  take
1875       precedence over this variable.
1876
1877       See  also  the CMAKE_FIND_USE_CMAKE_PATH, CMAKE_FIND_USE_CMAKE_ENVIRON‐
1878       MENT_PATH,    CMAKE_FIND_USE_CMAKE_SYSTEM_PATH,     CMAKE_FIND_USE_SYS‐
1879       TEM_ENVIRONMENT_PATH,    CMAKE_FIND_USE_SYSTEM_PACKAGE_REGISTRY,    and
1880       CMAKE_FIND_USE_PACKAGE_REGISTRY variables.
1881
1882   CMAKE_FIND_USE_SYSTEM_ENVIRONMENT_PATH
1883       Controls the default behavior of the following commands for whether  or
1884       not to search paths provided by standard system environment variables:
1885
1886       · find_program()
1887
1888       · find_library()
1889
1890       · find_file()
1891
1892       · find_path()
1893
1894       · find_package()
1895
1896       This is useful in cross-compiling environments.
1897
1898       By default this variable is not set, which is equivalent to it having a
1899       value of TRUE.  Explicit options  given  to  the  above  commands  take
1900       precedence over this variable.
1901
1902       See  also  the CMAKE_FIND_USE_CMAKE_PATH, CMAKE_FIND_USE_CMAKE_ENVIRON‐
1903       MENT_PATH,    CMAKE_FIND_USE_CMAKE_SYSTEM_PATH,    CMAKE_FIND_USE_PACK‐
1904       AGE_REGISTRY, CMAKE_FIND_USE_PACKAGE_ROOT_PATH, and CMAKE_FIND_USE_SYS‐
1905       TEM_PACKAGE_REGISTRY variables.
1906
1907   CMAKE_FIND_USE_SYSTEM_PACKAGE_REGISTRY
1908       Controls searching the System Package Registry  by  the  find_package()
1909       command.
1910
1911       By  default this variable is not set and the behavior will fall back to
1912       that determined by  the  deprecated  CMAKE_FIND_PACKAGE_NO_SYSTEM_PACK‐
1913       AGE_REGISTRY  variable.   If  that is also not set, then find_package()
1914       will use the System Package Registry unless  the  NO_CMAKE_SYSTEM_PACK‐
1915       AGE_REGISTRY option is provided.
1916
1917       This  variable takes precedence over CMAKE_FIND_PACKAGE_NO_SYSTEM_PACK‐
1918       AGE_REGISTRY when both are set.
1919
1920       In some cases, for example to locate only user specific  installations,
1921       it  is  not desirable to use the System Package Registry when searching
1922       for packages. If the CMAKE_FIND_USE_SYSTEM_PACKAGE_REGISTRY variable is
1923       FALSE,  all  the  find_package()  commands will skip the System Package
1924       Registry as if they were called with  the  NO_CMAKE_SYSTEM_PACKAGE_REG‐
1925       ISTRY argument.
1926
1927       See also Disabling the Package Registry.
1928
1929       See  also  the CMAKE_FIND_USE_CMAKE_PATH, CMAKE_FIND_USE_CMAKE_ENVIRON‐
1930       MENT_PATH,    CMAKE_FIND_USE_CMAKE_SYSTEM_PATH,     CMAKE_FIND_USE_SYS‐
1931       TEM_ENVIRONMENT_PATH,        CMAKE_FIND_USE_PACKAGE_REGISTRY,       and
1932       CMAKE_FIND_USE_PACKAGE_ROOT_PATH variables.
1933
1934   CMAKE_FRAMEWORK_PATH
1935       Semicolon-separated list of directories specifying a  search  path  for
1936       macOS   frameworks   used   by   the   find_library(),  find_package(),
1937       find_path(), and find_file() commands.
1938
1939   CMAKE_IGNORE_PATH
1940       Semicolon-separated list of directories to be ignored by the  find_pro‐
1941       gram(), find_library(), find_file(), and find_path() commands.  This is
1942       useful in cross-compiling environments where  some  system  directories
1943       contain  incompatible but possibly linkable libraries.  For example, on
1944       cross-compiled cluster environments,  this  allows  a  user  to  ignore
1945       directories containing libraries meant for the front-end machine.
1946
1947       By  default  this  is  empty;  it is intended to be set by the project.
1948       Note that CMAKE_IGNORE_PATH takes a list of directory names, not a list
1949       of prefixes.  To ignore paths under prefixes (bin, include, lib, etc.),
1950       specify them explicitly.
1951
1952       See also the CMAKE_PREFIX_PATH, CMAKE_LIBRARY_PATH, CMAKE_INCLUDE_PATH,
1953       and CMAKE_PROGRAM_PATH variables.
1954
1955   CMAKE_INCLUDE_DIRECTORIES_BEFORE
1956       Whether to append or prepend directories by default in include_directo‐
1957       ries().
1958
1959       This variable affects the default behavior of the include_directories()
1960       command.  Setting this variable to ON is equivalent to using the BEFORE
1961       option in all uses of that command.
1962
1963   CMAKE_INCLUDE_DIRECTORIES_PROJECT_BEFORE
1964       Whether to force prepending of project include directories.
1965
1966       This variable affects the order of  include  directories  generated  in
1967       compiler  command  lines.  If set to ON, it causes the CMAKE_SOURCE_DIR
1968       and the CMAKE_BINARY_DIR to appear first.
1969
1970   CMAKE_INCLUDE_PATH
1971       Semicolon-separated list of directories specifying a  search  path  for
1972       the  find_file()  and find_path() commands.  By default it is empty, it
1973       is  intended  to  be  set  by  the  project.    See   also   CMAKE_SYS‐
1974       TEM_INCLUDE_PATH and CMAKE_PREFIX_PATH.
1975
1976   CMAKE_INSTALL_DEFAULT_COMPONENT_NAME
1977       Default component used in install() commands.
1978
1979       If  an  install() command is used without the COMPONENT argument, these
1980       files will be grouped into a  default  component.   The  name  of  this
1981       default  install  component  will  be  taken  from  this  variable.  It
1982       defaults to Unspecified.
1983
1984   CMAKE_INSTALL_DEFAULT_DIRECTORY_PERMISSIONS
1985       Default permissions for directories created implicitly during installa‐
1986       tion of files by install() and file(INSTALL).
1987
1988       If  make install is invoked and directories are implicitly created they
1989       get  permissions  set  by   CMAKE_INSTALL_DEFAULT_DIRECTORY_PERMISSIONS
1990       variable  or  platform  specific default permissions if the variable is
1991       not set.
1992
1993       Implicitly created directories are created if they are  not  explicitly
1994       installed  by  install()  command but are needed to install a file on a
1995       certain path. Example of such locations are directories created due  to
1996       the setting of CMAKE_INSTALL_PREFIX.
1997
1998       Expected  content  of  the  CMAKE_INSTALL_DEFAULT_DIRECTORY_PERMISSIONS
1999       variable is a list of permissions that can be used by install() command
2000       PERMISSIONS section.
2001
2002       Example usage:
2003
2004          set(CMAKE_INSTALL_DEFAULT_DIRECTORY_PERMISSIONS
2005               OWNER_READ
2006               OWNER_WRITE
2007               OWNER_EXECUTE
2008               GROUP_READ
2009             )
2010
2011   CMAKE_INSTALL_MESSAGE
2012       Specify   verbosity  of  installation  script  code  generated  by  the
2013       install() command (using the file(INSTALL) command).   For  paths  that
2014       are newly installed or updated, installation may print lines like:
2015
2016          -- Installing: /some/destination/path
2017
2018       For  paths  that  are  already up to date, installation may print lines
2019       like:
2020
2021          -- Up-to-date: /some/destination/path
2022
2023       The CMAKE_INSTALL_MESSAGE variable may be set to control which messages
2024       are printed:
2025
2026       ALWAYS Print both Installing and Up-to-date messages.
2027
2028       LAZY   Print Installing but not Up-to-date messages.
2029
2030       NEVER  Print neither Installing nor Up-to-date messages.
2031
2032       Other values have undefined behavior and may not be diagnosed.
2033
2034       If this variable is not set, the default behavior is ALWAYS.
2035
2036   CMAKE_INSTALL_PREFIX
2037       Install directory used by install().
2038
2039       If  make  install  is  invoked  or  INSTALL is built, this directory is
2040       prepended onto all install  directories.   This  variable  defaults  to
2041       /usr/local  on  UNIX  and  c:/Program Files/${PROJECT_NAME} on Windows.
2042       See CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT for how a project might
2043       choose its own default.
2044
2045       On  UNIX  one  can  use  the DESTDIR mechanism in order to relocate the
2046       whole installation. See DESTDIR for more information.
2047
2048       The installation prefix is also added  to  CMAKE_SYSTEM_PREFIX_PATH  so
2049       that  find_package(),  find_program(), find_library(), find_path(), and
2050       find_file() will search the prefix for other software.
2051
2052       NOTE:
2053          Use the GNUInstallDirs module to provide GNU-style options  for  the
2054          layout of directories within the installation.
2055
2056   CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT
2057       CMake  sets this variable to a TRUE value when the CMAKE_INSTALL_PREFIX
2058       has just been initialized to its default value, typically on the  first
2059       run of CMake within a new build tree.  This can be used by project code
2060       to change the default without overriding a user-provided value:
2061
2062          if(CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT)
2063            set(CMAKE_INSTALL_PREFIX "/my/default" CACHE PATH "..." FORCE)
2064          endif()
2065
2066   CMAKE_LIBRARY_PATH
2067       Semicolon-separated list of directories specifying a  search  path  for
2068       the  find_library() command.  By default it is empty, it is intended to
2069       be  set  by  the  project.   See  also  CMAKE_SYSTEM_LIBRARY_PATH   and
2070       CMAKE_PREFIX_PATH.
2071
2072   CMAKE_LINK_DIRECTORIES_BEFORE
2073       Whether  to  append  or prepend directories by default in link_directo‐
2074       ries().
2075
2076       This variable affects the default behavior  of  the  link_directories()
2077       command.  Setting this variable to ON is equivalent to using the BEFORE
2078       option in all uses of that command.
2079
2080   CMAKE_MFC_FLAG
2081       Use the MFC library for an executable or dll.
2082
2083       Enables the use of the Microsoft Foundation Classes (MFC).   It  should
2084       be  set  to  1  for  the  static  MFC library, and 2 for the shared MFC
2085       library.  This is used in Visual Studio project files.
2086
2087       Usage example:
2088
2089          add_definitions(-D_AFXDLL)
2090          set(CMAKE_MFC_FLAG 2)
2091          add_executable(CMakeSetup WIN32 ${SRCS})
2092
2093   CMAKE_MAXIMUM_RECURSION_DEPTH
2094       Maximum recursion depth for CMake scripts. It is intended to be set  on
2095       the  command  line  with -DCMAKE_MAXIMUM_RECURSION_DEPTH=<x>, or within
2096       CMakeLists.txt by  projects  that  require  a  large  recursion  depth.
2097       Projects  that  set this variable should provide the user with a way to
2098       override it. For example:
2099
2100          # About to perform deeply recursive actions
2101          if(NOT CMAKE_MAXIMUM_RECURSION_DEPTH)
2102            set(CMAKE_MAXIMUM_RECURSION_DEPTH 2000)
2103          endif()
2104
2105       If it is not set, or is set to a non-integer value, a sensible  default
2106       limit is used. If the recursion limit is reached, the script terminates
2107       immediately with a fatal error.
2108
2109       Calling any of the following commands increases the recursion depth:
2110
2111       · include()
2112
2113       · find_package()
2114
2115       · add_subdirectory()
2116
2117       · try_compile()
2118
2119       · ctest_read_custom_files()
2120
2121       · ctest_run_script() (unless NEW_PROCESS is specified)
2122
2123       · User-defined function()’s and macro()’s  (note  that  function()  and
2124         macro() themselves don’t increase recursion depth)
2125
2126       · Reading  or  writing  variables  that  are  being  watched by a vari‐
2127         able_watch()
2128
2129   CMAKE_MODULE_PATH
2130       Semicolon-separated list of directories specifying a  search  path  for
2131       CMake  modules to be loaded by the include() or find_package() commands
2132       before checking the default modules that come with CMake.   By  default
2133       it is empty, it is intended to be set by the project.
2134
2135   CMAKE_POLICY_DEFAULT_CMP<NNNN>
2136       Default for CMake Policy CMP<NNNN> when it is otherwise left unset.
2137
2138       Commands  cmake_minimum_required(VERSION)  and cmake_policy(VERSION) by
2139       default leave policies introduced after the given version  unset.   Set
2140       CMAKE_POLICY_DEFAULT_CMP<NNNN> to OLD or NEW to specify the default for
2141       policy CMP<NNNN>, where <NNNN> is the policy number.
2142
2143       This variable should not be  set  by  a  project  in  CMake  code;  use
2144       cmake_policy(SET)  instead.   Users running CMake may set this variable
2145       in the cache (e.g. -DCMAKE_POLICY_DEFAULT_CMP<NNNN>=<OLD|NEW>) to set a
2146       policy  not otherwise set by the project.  Set to OLD to quiet a policy
2147       warning while using old behavior or to NEW to try building the  project
2148       with new behavior.
2149
2150   CMAKE_POLICY_WARNING_CMP<NNNN>
2151       Explicitly enable or disable the warning when CMake Policy CMP<NNNN> is
2152       not set.  This is meaningful only for the few policies that do not warn
2153       by default:
2154
2155       · CMAKE_POLICY_WARNING_CMP0025 controls the warning for policy CMP0025.
2156
2157       · CMAKE_POLICY_WARNING_CMP0047 controls the warning for policy CMP0047.
2158
2159       · CMAKE_POLICY_WARNING_CMP0056 controls the warning for policy CMP0056.
2160
2161       · CMAKE_POLICY_WARNING_CMP0060 controls the warning for policy CMP0060.
2162
2163       · CMAKE_POLICY_WARNING_CMP0065 controls the warning for policy CMP0065.
2164
2165       · CMAKE_POLICY_WARNING_CMP0066 controls the warning for policy CMP0066.
2166
2167       · CMAKE_POLICY_WARNING_CMP0067 controls the warning for policy CMP0067.
2168
2169       · CMAKE_POLICY_WARNING_CMP0082 controls the warning for policy CMP0082.
2170
2171       · CMAKE_POLICY_WARNING_CMP0089 controls the warning for policy CMP0089.
2172
2173       This  variable  should  not be set by a project in CMake code.  Project
2174       developers running CMake may set this variable in their cache to enable
2175       the warning (e.g. -DCMAKE_POLICY_WARNING_CMP<NNNN>=ON).  Alternatively,
2176       running cmake(1) with the --debug-output,  --trace,  or  --trace-expand
2177       option will also enable the warning.
2178
2179   CMAKE_PREFIX_PATH
2180       Semicolon-separated  list  of  directories specifying installation pre‐
2181       fixes  to  be   searched   by   the   find_package(),   find_program(),
2182       find_library(),  find_file(),  and  find_path() commands.  Each command
2183       will add appropriate subdirectories (like  bin,  lib,  or  include)  as
2184       specified in its own documentation.
2185
2186       By default this is empty.  It is intended to be set by the project.
2187
2188       See       also       CMAKE_SYSTEM_PREFIX_PATH,      CMAKE_INCLUDE_PATH,
2189       CMAKE_LIBRARY_PATH, CMAKE_PROGRAM_PATH, and CMAKE_IGNORE_PATH.
2190
2191   CMAKE_PROGRAM_PATH
2192       Semicolon-separated list of directories specifying a  search  path  for
2193       the  find_program() command.  By default it is empty, it is intended to
2194       be  set  by  the  project.   See  also  CMAKE_SYSTEM_PROGRAM_PATH   and
2195       CMAKE_PREFIX_PATH.
2196
2197   CMAKE_PROJECT_INCLUDE
2198       A  CMake language file or module to be included as the last step of all
2199       project() command calls.  This is intended for  injecting  custom  code
2200       into project builds without modifying their source.
2201
2202       See      also      the     CMAKE_PROJECT_<PROJECT-NAME>_INCLUDE     and
2203       CMAKE_PROJECT_INCLUDE_BEFORE variables.
2204
2205   CMAKE_PROJECT_INCLUDE_BEFORE
2206       A CMake language file or module to be included as the first step of all
2207       project()  command  calls.   This is intended for injecting custom code
2208       into project builds without modifying their source.
2209
2210       See     also     the      CMAKE_PROJECT_<PROJECT-NAME>_INCLUDE      and
2211       CMAKE_PROJECT_INCLUDE variables.
2212
2213   CMAKE_PROJECT_<PROJECT-NAME>_INCLUDE
2214       A  CMake language file or module to be included as the last step of any
2215       project() command calls that  specify  <PROJECT-NAME>  as  the  project
2216       name.   This  is intended for injecting custom code into project builds
2217       without modifying their source.
2218
2219       See also  the  CMAKE_PROJECT_INCLUDE  and  CMAKE_PROJECT_INCLUDE_BEFORE
2220       variables.
2221
2222   CMAKE_SKIP_INSTALL_ALL_DEPENDENCY
2223       Don’t make the install target depend on the all target.
2224
2225       By default, the install target depends on the all target.  This has the
2226       effect, that when make install is invoked or INSTALL  is  built,  first
2227       the   all   target   is   built,  then  the  installation  starts.   If
2228       CMAKE_SKIP_INSTALL_ALL_DEPENDENCY is set to TRUE,  this  dependency  is
2229       not  created, so the installation process will start immediately, inde‐
2230       pendent from whether the project has been completely built or not.
2231
2232   CMAKE_STAGING_PREFIX
2233       This variable may be set to a path to install to when  cross-compiling.
2234       This can be useful if the path in CMAKE_SYSROOT is read-only, or other‐
2235       wise should remain pristine.
2236
2237       The CMAKE_STAGING_PREFIX location is also used as a  search  prefix  by
2238       the   find_*   commands.   This   can  be  controlled  by  setting  the
2239       CMAKE_FIND_NO_INSTALL_PREFIX variable.
2240
2241       If  any  RPATH/RUNPATH  entries  passed  to  the  linker  contain   the
2242       CMAKE_STAGING_PREFIX, the matching path fragments are replaced with the
2243       CMAKE_INSTALL_PREFIX.
2244
2245   CMAKE_SUBLIME_TEXT_2_ENV_SETTINGS
2246       This variable contains a list of env vars as a list of tokens with  the
2247       syntax var=value.
2248
2249       Example:
2250
2251          set(CMAKE_SUBLIME_TEXT_2_ENV_SETTINGS
2252             "FOO=FOO1\;FOO2\;FOON"
2253             "BAR=BAR1\;BAR2\;BARN"
2254             "BAZ=BAZ1\;BAZ2\;BAZN"
2255             "FOOBAR=FOOBAR1\;FOOBAR2\;FOOBARN"
2256             "VALID="
2257             )
2258
2259       In case of malformed variables CMake will fail:
2260
2261          set(CMAKE_SUBLIME_TEXT_2_ENV_SETTINGS
2262              "THIS_IS_NOT_VALID"
2263              )
2264
2265   CMAKE_SUBLIME_TEXT_2_EXCLUDE_BUILD_TREE
2266       If  this  variable  evaluates  to ON at the end of the top-level CMake‐
2267       Lists.txt file, the Sublime Text 2 extra generator excludes  the  build
2268       tree from the .sublime-project if it is inside the source tree.
2269
2270   CMAKE_SUPPRESS_REGENERATION
2271       If  CMAKE_SUPPRESS_REGENERATION  is  OFF,  which is default, then CMake
2272       adds a special target on which all other targets depend that checks the
2273       build  system and optionally re-runs CMake to regenerate the build sys‐
2274       tem when the target specification source changes.
2275
2276       If this variable evaluates to ON at the end  of  the  top-level  CMake‐
2277       Lists.txt file, CMake will not add the regeneration target to the build
2278       system or perform any build system checks.
2279
2280   CMAKE_SYSROOT
2281       Path to pass to the compiler in the --sysroot flag.
2282
2283       The CMAKE_SYSROOT content is passed to the compiler  in  the  --sysroot
2284       flag,  if  supported.  The path is also stripped from the RPATH/RUNPATH
2285       if necessary on installation.  The CMAKE_SYSROOT is also used to prefix
2286       paths searched by the find_* commands.
2287
2288       This  variable  may  only  be  set in a toolchain file specified by the
2289       CMAKE_TOOLCHAIN_FILE variable.
2290
2291       See also the CMAKE_SYSROOT_COMPILE and CMAKE_SYSROOT_LINK variables.
2292
2293   CMAKE_SYSROOT_COMPILE
2294       Path to pass to the compiler  in  the  --sysroot  flag  when  compiling
2295       source  files.   This is the same as CMAKE_SYSROOT but is used only for
2296       compiling sources and not linking.
2297
2298       This variable may only be set in a  toolchain  file  specified  by  the
2299       CMAKE_TOOLCHAIN_FILE variable.
2300
2301   CMAKE_SYSROOT_LINK
2302       Path  to pass to the compiler in the --sysroot flag when linking.  This
2303       is the same as CMAKE_SYSROOT but is used only for linking and not  com‐
2304       piling sources.
2305
2306       This  variable  may  only  be  set in a toolchain file specified by the
2307       CMAKE_TOOLCHAIN_FILE variable.
2308
2309   CMAKE_SYSTEM_APPBUNDLE_PATH
2310       Search path for macOS application bundles used by  the  find_program(),
2311       and  find_package()  commands.   By  default  it  contains the standard
2312       directories for the current system.  It is not intended to be  modified
2313       by the project, use CMAKE_APPBUNDLE_PATH for this.
2314
2315   CMAKE_SYSTEM_FRAMEWORK_PATH
2316       Search path for macOS frameworks used by the find_library(), find_pack‐
2317       age(), find_path(), and find_file() commands.  By default  it  contains
2318       the standard directories for the current system.  It is not intended to
2319       be modified by the project, use CMAKE_FRAMEWORK_PATH for this.
2320
2321   CMAKE_SYSTEM_IGNORE_PATH
2322       Semicolon-separated list of directories to be ignored by the  find_pro‐
2323       gram(), find_library(), find_file(), and find_path() commands.  This is
2324       useful in cross-compiling environments where  some  system  directories
2325       contain  incompatible but possibly linkable libraries.  For example, on
2326       cross-compiled cluster environments,  this  allows  a  user  to  ignore
2327       directories containing libraries meant for the front-end machine.
2328
2329       By  default this contains a list of directories containing incompatible
2330       binaries for the host system.  See the CMAKE_IGNORE_PATH variable  that
2331       is intended to be set by the project.
2332
2333       See   also   the  CMAKE_SYSTEM_PREFIX_PATH,  CMAKE_SYSTEM_LIBRARY_PATH,
2334       CMAKE_SYSTEM_INCLUDE_PATH, and CMAKE_SYSTEM_PROGRAM_PATH variables.
2335
2336   CMAKE_SYSTEM_INCLUDE_PATH
2337       Semicolon-separated list of directories specifying a  search  path  for
2338       the find_file() and find_path() commands.  By default this contains the
2339       standard directories for the current system.  It is not intended to  be
2340       modified  by  the  project;  use CMAKE_INCLUDE_PATH for this.  See also
2341       CMAKE_SYSTEM_PREFIX_PATH.
2342
2343   CMAKE_SYSTEM_LIBRARY_PATH
2344       Semicolon-separated list of directories specifying a  search  path  for
2345       the  find_library()  command.   By  default  this contains the standard
2346       directories for the current system.  It is not intended to be  modified
2347       by  the  project; use CMAKE_LIBRARY_PATH for this.  See also CMAKE_SYS‐
2348       TEM_PREFIX_PATH.
2349
2350   CMAKE_SYSTEM_PREFIX_PATH
2351       Semicolon-separated list of directories  specifying  installation  pre‐
2352       fixes   to   be   searched   by   the  find_package(),  find_program(),
2353       find_library(), find_file(), and find_path()  commands.   Each  command
2354       will  add  appropriate  subdirectories  (like  bin, lib, or include) as
2355       specified in its own documentation.
2356
2357       By default this contains the standard directories for the current  sys‐
2358       tem,  the  CMAKE_INSTALL_PREFIX,  and  the  CMAKE_STAGING_PREFIX.   The
2359       installation and staging  prefixes  may  be  excluded  by  setting  the
2360       CMAKE_FIND_NO_INSTALL_PREFIX variable.
2361
2362       CMAKE_SYSTEM_PREFIX_PATH is not intended to be modified by the project;
2363       use CMAKE_PREFIX_PATH for this.
2364
2365       See    also    CMAKE_SYSTEM_INCLUDE_PATH,    CMAKE_SYSTEM_LIBRARY_PATH,
2366       CMAKE_SYSTEM_PROGRAM_PATH, and CMAKE_SYSTEM_IGNORE_PATH.
2367
2368   CMAKE_SYSTEM_PROGRAM_PATH
2369       Semicolon-separated  list  of  directories specifying a search path for
2370       the find_program() command.  By  default  this  contains  the  standard
2371       directories  for the current system.  It is not intended to be modified
2372       by the project; use CMAKE_PROGRAM_PATH for this.  See  also  CMAKE_SYS‐
2373       TEM_PREFIX_PATH.
2374
2375   CMAKE_USER_MAKE_RULES_OVERRIDE
2376       Specify a CMake file that overrides platform information.
2377
2378       CMake loads the specified file while enabling support for each language
2379       from either the project() or enable_language() commands.  It is  loaded
2380       after  CMake’s  builtin  compiler and platform information modules have
2381       been loaded but before the information is used.  The file may set plat‐
2382       form information variables to override CMake’s defaults.
2383
2384       This  feature  is intended for use only in overriding information vari‐
2385       ables that must be set before CMake builds its first  test  project  to
2386       check that the compiler for a language works.  It should not be used to
2387       load a file in cases that a normal include() will work.  Use it only as
2388       a  last resort for behavior that cannot be achieved any other way.  For
2389       example, one may set the  CMAKE_C_FLAGS_INIT  variable  to  change  the
2390       default  value  used to initialize the CMAKE_C_FLAGS variable before it
2391       is cached.  The override file should NOT be used to set  anything  that
2392       could  be  set  after  languages  are  enabled,  such as variables like
2393       CMAKE_RUNTIME_OUTPUT_DIRECTORY that affect the placement  of  binaries.
2394       Information  set  in  the  file  will  be  used  for  try_compile() and
2395       try_run() builds too.
2396
2397   CMAKE_WARN_DEPRECATED
2398       Whether to issue warnings for deprecated functionality.
2399
2400       If not FALSE, use of deprecated functionality will issue warnings.   If
2401       this variable is not set, CMake behaves as if it were set to TRUE.
2402
2403       When running cmake(1), this option can be enabled with the -Wdeprecated
2404       option, or disabled with the -Wno-deprecated option.
2405
2406   CMAKE_WARN_ON_ABSOLUTE_INSTALL_DESTINATION
2407       Ask cmake_install.cmake script to warn each time a file  with  absolute
2408       INSTALL DESTINATION is encountered.
2409
2410       This  variable  is used by CMake-generated cmake_install.cmake scripts.
2411       If one sets this variable to ON while running the script,  it  may  get
2412       warning messages from the script.
2413
2414   CMAKE_XCODE_GENERATE_TOP_LEVEL_PROJECT_ONLY
2415       If  enabled,  the  Xcode  generator  will  generate only a single Xcode
2416       project file for the topmost project() command  instead  of  generating
2417       one for every project() command.
2418
2419       This  could  be  useful to speed up the CMake generation step for large
2420       projects and to work-around a bug in the ZERO_CHECK logic.
2421
2422   CMAKE_XCODE_SCHEME_ADDRESS_SANITIZER
2423       Whether to enable Address Sanitizer in the Diagnostics section  of  the
2424       generated Xcode scheme.
2425
2426       This  variable  initializes the XCODE_SCHEME_ADDRESS_SANITIZER property
2427       on all targets.
2428
2429       Please refer to the XCODE_GENERATE_SCHEME target property documentation
2430       to see all Xcode schema related properties.
2431
2432   CMAKE_XCODE_SCHEME_ADDRESS_SANITIZER_USE_AFTER_RETURN
2433       Whether  to  enable Detect use of stack after return in the Diagnostics
2434       section of the generated Xcode scheme.
2435
2436       This    variable     initializes     the     XCODE_SCHEME_ADDRESS_SANI‐
2437       TIZER_USE_AFTER_RETURN property on all targets.
2438
2439       Please refer to the XCODE_GENERATE_SCHEME target property documentation
2440       to see all Xcode schema related properties.
2441
2442   CMAKE_XCODE_SCHEME_DEBUG_DOCUMENT_VERSIONING
2443       Whether to enable Allow debugging when using document Versions  Browser
2444       in the Options section of the generated Xcode scheme.
2445
2446       This  variable  initializes  the XCODE_SCHEME_DEBUG_DOCUMENT_VERSIONING
2447       property on all targets.
2448
2449       Please refer to the XCODE_GENERATE_SCHEME target property documentation
2450       to see all Xcode schema related properties.
2451
2452   CMAKE_XCODE_SCHEME_DISABLE_MAIN_THREAD_CHECKER
2453       Whether  to  disable the Main Thread Checker in the Diagnostics section
2454       of the generated Xcode scheme.
2455
2456       This variable initializes the  XCODE_SCHEME_DISABLE_MAIN_THREAD_CHECKER
2457       property on all targets.
2458
2459       Please refer to the XCODE_GENERATE_SCHEME target property documentation
2460       to see all Xcode schema related properties.
2461
2462   CMAKE_XCODE_SCHEME_DYNAMIC_LIBRARY_LOADS
2463       Whether to enable Dynamic Library Loads in the Diagnostics  section  of
2464       the generated Xcode scheme.
2465
2466       This  variable initializes the XCODE_SCHEME_DYNAMIC_LIBRARY_LOADS prop‐
2467       erty on all targets.
2468
2469       Please refer to the XCODE_GENERATE_SCHEME target property documentation
2470       to see all Xcode schema related properties.
2471
2472   CMAKE_XCODE_SCHEME_DYNAMIC_LINKER_API_USAGE
2473       Whether  to  enable Dynamic Linker API usage in the Diagnostics section
2474       of the generated Xcode scheme.
2475
2476       This  variable  initializes  the  XCODE_SCHEME_DYNAMIC_LINKER_API_USAGE
2477       property on all targets.
2478
2479       Please refer to the XCODE_GENERATE_SCHEME target property documentation
2480       to see all Xcode schema related properties.
2481
2482   CMAKE_XCODE_SCHEME_GUARD_MALLOC
2483       Whether to enable Guard Malloc in the Diagnostics section of the gener‐
2484       ated Xcode scheme.
2485
2486       This variable initializes the XCODE_SCHEME_GUARD_MALLOC property on all
2487       targets.
2488
2489       Please refer to the XCODE_GENERATE_SCHEME target property documentation
2490       to see all Xcode schema related properties.
2491
2492   CMAKE_XCODE_SCHEME_MAIN_THREAD_CHECKER_STOP
2493       Whether to enable the Main Thread Checker option Pause on issues in the
2494       Diagnostics section of the generated Xcode scheme.
2495
2496       This  variable  initializes  the  XCODE_SCHEME_MAIN_THREAD_CHECKER_STOP
2497       property on all targets.
2498
2499       Please refer to the XCODE_GENERATE_SCHEME target property documentation
2500       to see all Xcode schema related properties.
2501
2502   CMAKE_XCODE_SCHEME_MALLOC_GUARD_EDGES
2503       Whether to enable Malloc Guard Edges in the Diagnostics section of  the
2504       generated Xcode scheme.
2505
2506       This  variable initializes the XCODE_SCHEME_MALLOC_GUARD_EDGES property
2507       on all targets.
2508
2509       Please refer to the XCODE_GENERATE_SCHEME target property documentation
2510       to see all Xcode schema related properties.
2511
2512   CMAKE_XCODE_SCHEME_MALLOC_SCRIBBLE
2513       Whether  to  enable  Malloc  Scribble in the Diagnostics section of the
2514       generated Xcode scheme.
2515
2516       This variable initializes the XCODE_SCHEME_MALLOC_SCRIBBLE property  on
2517       all targets.
2518
2519       Please refer to the XCODE_GENERATE_SCHEME target property documentation
2520       to see all Xcode schema related properties.
2521
2522   CMAKE_XCODE_SCHEME_MALLOC_STACK
2523       Whether to enable Malloc Stack in the Diagnostics section of the gener‐
2524       ated Xcode scheme.
2525
2526       This variable initializes the XCODE_SCHEME_MALLOC_STACK property on all
2527       targets.
2528
2529       Please refer to the XCODE_GENERATE_SCHEME target property documentation
2530       to see all Xcode schema related properties.
2531
2532   CMAKE_XCODE_SCHEME_THREAD_SANITIZER
2533       Whether  to  enable  Thread Sanitizer in the Diagnostics section of the
2534       generated Xcode scheme.
2535
2536       This variable initializes the XCODE_SCHEME_THREAD_SANITIZER property on
2537       all targets.
2538
2539       Please refer to the XCODE_GENERATE_SCHEME target property documentation
2540       to see all Xcode schema related properties.
2541
2542   CMAKE_XCODE_SCHEME_THREAD_SANITIZER_STOP
2543       Whether to enable Thread Sanitizer - Pause on issues in the Diagnostics
2544       section of the generated Xcode scheme.
2545
2546       This  variable initializes the XCODE_SCHEME_THREAD_SANITIZER_STOP prop‐
2547       erty on all targets.
2548
2549       Please refer to the XCODE_GENERATE_SCHEME target property documentation
2550       to see all Xcode schema related properties.
2551
2552   CMAKE_XCODE_SCHEME_UNDEFINED_BEHAVIOUR_SANITIZER
2553       Whether  to enable Undefined Behavior Sanitizer in the Diagnostics sec‐
2554       tion of the generated Xcode scheme.
2555
2556       This variable  initializes  the  XCODE_SCHEME_UNDEFINED_BEHAVIOUR_SANI‐
2557       TIZER property on all targets.
2558
2559       Please refer to the XCODE_GENERATE_SCHEME target property documentation
2560       to see all Xcode schema related properties.
2561
2562   CMAKE_XCODE_SCHEME_UNDEFINED_BEHAVIOUR_SANITIZER_STOP
2563       Whether to enable Undefined Behavior Sanitizer option Pause  on  issues
2564       in the Diagnostics section of the generated Xcode scheme.
2565
2566       This  variable  initializes  the XCODE_SCHEME_UNDEFINED_BEHAVIOUR_SANI‐
2567       TIZER_STOP property on all targets.
2568
2569       Please refer to the XCODE_GENERATE_SCHEME target property documentation
2570       to see all Xcode schema related properties.
2571
2572   CMAKE_XCODE_SCHEME_ZOMBIE_OBJECTS
2573       Whether to enable Zombie Objects in the Diagnostics section of the gen‐
2574       erated Xcode scheme.
2575
2576       This variable initializes the XCODE_SCHEME_ZOMBIE_OBJECTS  property  on
2577       all targets.
2578
2579       Please refer to the XCODE_GENERATE_SCHEME target property documentation
2580       to see all Xcode schema related properties.
2581
2582   <PackageName>_ROOT
2583       Calls to find_package(<PackageName>) will search in prefixes  specified
2584       by  the  <PackageName>_ROOT  CMake variable, where <PackageName> is the
2585       name given to the find_package() call and _ROOT is literal.  For  exam‐
2586       ple,  find_package(Foo)  will search prefixes specified in the Foo_ROOT
2587       CMake variable (if set).  See policy CMP0074.
2588
2589       This variable may hold a single prefix or a semicolon-separated list of
2590       multiple prefixes.
2591
2592       See also the <PackageName>_ROOT environment variable.
2593

VARIABLES THAT DESCRIBE THE SYSTEM

2595   ANDROID
2596       Set to 1 when the target system (CMAKE_SYSTEM_NAME) is Android.
2597
2598   APPLE
2599       Set  to  True  when the target system is an Apple platform (macOS, iOS,
2600       tvOS or watchOS).
2601
2602   BORLAND
2603       True if the Borland compiler is being used.
2604
2605       This is set to true if the Borland compiler is being used.
2606
2607   CMAKE_CL_64
2608       Discouraged.  Use CMAKE_SIZEOF_VOID_P instead.
2609
2610       Set to a true value when using a Microsoft Visual  Studio  cl  compiler
2611       that targets a 64-bit architecture.
2612
2613   CMAKE_COMPILER_2005
2614       Using the Visual Studio 2005 compiler from Microsoft
2615
2616       Set to true when using the Visual Studio 2005 compiler from Microsoft.
2617
2618   CMAKE_HOST_APPLE
2619       True for Apple macOS operating systems.
2620
2621       Set to true when the host system is Apple macOS.
2622
2623   CMAKE_HOST_SOLARIS
2624       True for Oracle Solaris operating systems.
2625
2626       Set to true when the host system is Oracle Solaris.
2627
2628   CMAKE_HOST_SYSTEM
2629       Composite Name of OS CMake is being run on.
2630
2631       This   variable   is   the   composite  of  CMAKE_HOST_SYSTEM_NAME  and
2632       CMAKE_HOST_SYSTEM_VERSION,           e.g.             ${CMAKE_HOST_SYS‐
2633       TEM_NAME}-${CMAKE_HOST_SYSTEM_VERSION}.   If  CMAKE_HOST_SYSTEM_VERSION
2634       is not set, then this variable is the same as CMAKE_HOST_SYSTEM_NAME.
2635
2636   CMAKE_HOST_SYSTEM_NAME
2637       Name of the OS CMake is running on.
2638
2639       On systems that have the uname command, this variable  is  set  to  the
2640       output  of uname -s.  Linux, Windows, and Darwin for macOS are the val‐
2641       ues found on the big three operating systems.
2642
2643   CMAKE_HOST_SYSTEM_PROCESSOR
2644       The name of the CPU CMake is running on.
2645
2646       On systems that support uname, this variable is set to  the  output  of
2647       uname  -p.   On Windows it is set to the value of the environment vari‐
2648       able PROCESSOR_ARCHITECTURE.
2649
2650   CMAKE_HOST_SYSTEM_VERSION
2651       The OS version CMake is running on.
2652
2653       A numeric version string for  the  system.   On  systems  that  support
2654       uname, this variable is set to the output of uname -r. On other systems
2655       this is set to major-minor version numbers.
2656
2657   CMAKE_HOST_UNIX
2658       True for UNIX and UNIX like operating systems.
2659
2660       Set to true when the host system is UNIX or UNIX like (i.e.  APPLE  and
2661       CYGWIN).
2662
2663   CMAKE_HOST_WIN32
2664       True  if  the  host system is running Windows, including Windows 64-bit
2665       and MSYS.
2666
2667       Set to false on Cygwin.
2668
2669   CMAKE_LIBRARY_ARCHITECTURE
2670       Target architecture library directory name, if detected.
2671
2672       This is the value of CMAKE_<LANG>_LIBRARY_ARCHITECTURE as detected  for
2673       one of the enabled languages.
2674
2675   CMAKE_LIBRARY_ARCHITECTURE_REGEX
2676       Regex matching possible target architecture library directory names.
2677
2678       This  is  used  to  detect  CMAKE_<LANG>_LIBRARY_ARCHITECTURE  from the
2679       implicit linker search path by matching the <arch> name.
2680
2681   CMAKE_OBJECT_PATH_MAX
2682       Maximum object file full-path length allowed by native build tools.
2683
2684       CMake computes for every source file an object file name that is unique
2685       to  the  source file and deterministic with respect to the full path to
2686       the source file.  This allows multiple source  files  in  a  target  to
2687       share  the  same  name  if  they  lie  in different directories without
2688       rebuilding when one is added or removed.  However, it can produce  long
2689       full  paths  in a few cases, so CMake shortens the path using a hashing
2690       scheme when the full path to an object file exceeds a limit.  CMake has
2691       a built-in limit for each platform that is sufficient for common tools,
2692       but some native tools may have a lower limit.  This variable may be set
2693       to  specify the limit explicitly.  The value must be an integer no less
2694       than 128.
2695
2696   CMAKE_SYSTEM
2697       Composite name of operating system CMake is compiling for.
2698
2699       This variable is the  composite  of  CMAKE_SYSTEM_NAME  and  CMAKE_SYS‐
2700       TEM_VERSION,  e.g.   ${CMAKE_SYSTEM_NAME}-${CMAKE_SYSTEM_VERSION}.   If
2701       CMAKE_SYSTEM_VERSION is not set, then this  variable  is  the  same  as
2702       CMAKE_SYSTEM_NAME.
2703
2704   CMAKE_SYSTEM_NAME
2705       The  name of the operating system for which CMake is to build.  See the
2706       CMAKE_SYSTEM_VERSION variable for the OS version.
2707
2708       Note that CMAKE_SYSTEM_NAME is not set to anything by default when run‐
2709       ning in script mode, since it’s not building anything.
2710
2711   System Name for Host Builds
2712       CMAKE_SYSTEM_NAME   is  by  default  set  to  the  same  value  as  the
2713       CMAKE_HOST_SYSTEM_NAME variable so that the build targets the host sys‐
2714       tem.
2715
2716   System Name for Cross Compiling
2717       CMAKE_SYSTEM_NAME  may  be  set explicitly when first configuring a new
2718       build tree in order to  enable  cross  compiling.   In  this  case  the
2719       CMAKE_SYSTEM_VERSION variable must also be set explicitly.
2720
2721   CMAKE_SYSTEM_PROCESSOR
2722       The name of the CPU CMake is building for.
2723
2724       This  variable  is the same as CMAKE_HOST_SYSTEM_PROCESSOR if you build
2725       for the host system instead of the target system when cross compiling.
2726
2727   CMAKE_SYSTEM_VERSION
2728       The version of the operating system for which CMake is to  build.   See
2729       the CMAKE_SYSTEM_NAME variable for the OS name.
2730
2731   System Version for Host Builds
2732       When  the  CMAKE_SYSTEM_NAME  variable  takes  its  default  value then
2733       CMAKE_SYSTEM_VERSION is by  default  set  to  the  same  value  as  the
2734       CMAKE_HOST_SYSTEM_VERSION  variable  so that the build targets the host
2735       system version.
2736
2737       In the case of a  host  build  then  CMAKE_SYSTEM_VERSION  may  be  set
2738       explicitly  when  first configuring a new build tree in order to enable
2739       targeting the build for a different version of the host operating  sys‐
2740       tem than is actually running on the host.  This is allowed and not con‐
2741       sidered cross compiling so long as the binaries built for the specified
2742       OS version can still run on the host.
2743
2744   System Version for Cross Compiling
2745       When  the  CMAKE_SYSTEM_NAME variable is set explicitly to enable cross
2746       compiling then the value  of  CMAKE_SYSTEM_VERSION  must  also  be  set
2747       explicitly to specify the target system version.
2748
2749   CYGWIN
2750       True for Cygwin.
2751
2752       Set to true when using Cygwin.
2753
2754   GHS-MULTI
2755       True when using Green Hills MULTI generator.
2756
2757   IOS
2758       Set to 1 when the target system (CMAKE_SYSTEM_NAME) is iOS.
2759
2760   MINGW
2761       True when using MinGW
2762
2763       Set to true when the compiler is some version of MinGW.
2764
2765   MSVC
2766       Set  to  true when the compiler is some version of Microsoft Visual C++
2767       or another compiler  simulating  Visual  C++.   Any  compiler  defining
2768       _MSC_VER is considered simulating Visual C++.
2769
2770       See also the MSVC_VERSION variable.
2771
2772   MSVC10
2773       Discouraged.  Use the MSVC_VERSION variable instead.
2774
2775       True  when  using  the Microsoft Visual Studio v100 toolset (cl version
2776       16) or another compiler that simulates it.
2777
2778   MSVC11
2779       Discouraged.  Use the MSVC_VERSION variable instead.
2780
2781       True when using the Microsoft Visual Studio v110  toolset  (cl  version
2782       17) or another compiler that simulates it.
2783
2784   MSVC12
2785       Discouraged.  Use the MSVC_VERSION variable instead.
2786
2787       True  when  using  the Microsoft Visual Studio v120 toolset (cl version
2788       18) or another compiler that simulates it.
2789
2790   MSVC14
2791       Discouraged.  Use the MSVC_VERSION variable instead.
2792
2793       True when using the Microsoft Visual Studio v140 or  v141  toolset  (cl
2794       version 19) or another compiler that simulates it.
2795
2796   MSVC60
2797       Discouraged.  Use the MSVC_VERSION variable instead.
2798
2799       True when using Microsoft Visual C++ 6.0.
2800
2801       Set to true when the compiler is version 6.0 of Microsoft Visual C++.
2802
2803   MSVC70
2804       Discouraged.  Use the MSVC_VERSION variable instead.
2805
2806       True when using Microsoft Visual C++ 7.0.
2807
2808       Set to true when the compiler is version 7.0 of Microsoft Visual C++.
2809
2810   MSVC71
2811       Discouraged.  Use the MSVC_VERSION variable instead.
2812
2813       True when using Microsoft Visual C++ 7.1.
2814
2815       Set to true when the compiler is version 7.1 of Microsoft Visual C++.
2816
2817   MSVC80
2818       Discouraged.  Use the MSVC_VERSION variable instead.
2819
2820       True when using the Microsoft Visual Studio v80 toolset (cl version 14)
2821       or another compiler that simulates it.
2822
2823   MSVC90
2824       Discouraged.  Use the MSVC_VERSION variable instead.
2825
2826       True when using the Microsoft Visual Studio v90 toolset (cl version 15)
2827       or another compiler that simulates it.
2828
2829   MSVC_IDE
2830       True when using the Microsoft Visual C++ IDE.
2831
2832       Set  to  true when the target platform is the Microsoft Visual C++ IDE,
2833       as opposed to the command line compiler.
2834
2835   MSVC_TOOLSET_VERSION
2836       The toolset version of Microsoft Visual C/C++ being used  if  any.   If
2837       MSVC-like  is  being used, this variable is set based on the version of
2838       the compiler as given by the MSVC_VERSION variable.
2839
2840       Known toolset version numbers are:
2841
2842          80        = VS 2005 (8.0)
2843          90        = VS 2008 (9.0)
2844          100       = VS 2010 (10.0)
2845          110       = VS 2012 (11.0)
2846          120       = VS 2013 (12.0)
2847          140       = VS 2015 (14.0)
2848          141       = VS 2017 (15.0)
2849          142       = VS 2019 (16.0)
2850
2851       Compiler versions newer than those known to CMake will be  reported  as
2852       the latest known toolset version.
2853
2854       See also the MSVC_VERSION variable.
2855
2856   MSVC_VERSION
2857       The version of Microsoft Visual C/C++ being used if any.  If a compiler
2858       simulating Visual C++ is being  used,  this  variable  is  set  to  the
2859       toolset version simulated as given by the _MSC_VER preprocessor defini‐
2860       tion.
2861
2862       Known version numbers are:
2863
2864          1200      = VS  6.0
2865          1300      = VS  7.0
2866          1310      = VS  7.1
2867          1400      = VS  8.0 (v80 toolset)
2868          1500      = VS  9.0 (v90 toolset)
2869          1600      = VS 10.0 (v100 toolset)
2870          1700      = VS 11.0 (v110 toolset)
2871          1800      = VS 12.0 (v120 toolset)
2872          1900      = VS 14.0 (v140 toolset)
2873          1910-1919 = VS 15.0 (v141 toolset)
2874          1920-1929 = VS 16.0 (v142 toolset)
2875
2876       See also the   CMAKE_<LANG>_COMPILER_VERSION  and  MSVC_TOOLSET_VERSION
2877       variable.
2878
2879   MSYS
2880       True when using the MSYS Makefiles generator.
2881
2882   UNIX
2883       Set to True when the target system is UNIX or UNIX-like (e.g. APPLE and
2884       CYGWIN).  The CMAKE_SYSTEM_NAME variable should be queried  if  a  more
2885       specific understanding of the target system is required.
2886
2887   WIN32
2888       Set to True when the target system is Windows, including Win64.
2889
2890   WINCE
2891       True when the CMAKE_SYSTEM_NAME variable is set to WindowsCE.
2892
2893   WINDOWS_PHONE
2894       True when the CMAKE_SYSTEM_NAME variable is set to WindowsPhone.
2895
2896   WINDOWS_STORE
2897       True when the CMAKE_SYSTEM_NAME variable is set to WindowsStore.
2898
2899   XCODE
2900       True when using Xcode generator.
2901
2902   XCODE_VERSION
2903       Version of Xcode (Xcode generator only).
2904
2905       Under the Xcode generator, this is the version of Xcode as specified in
2906       Xcode.app/Contents/version.plist (such as 3.1.2).
2907

VARIABLES THAT CONTROL THE BUILD

2909   CMAKE_ANDROID_ANT_ADDITIONAL_OPTIONS
2910       Default value for the ANDROID_ANT_ADDITIONAL_OPTIONS  target  property.
2911       See that target property for additional information.
2912
2913   CMAKE_ANDROID_API
2914       When Cross Compiling for Android with NVIDIA Nsight Tegra Visual Studio
2915       Edition, this variable may be set to specify the default value for  the
2916       ANDROID_API  target  property.  See that target property for additional
2917       information.
2918
2919       Otherwise, when Cross Compiling for Android, this variable provides the
2920       Android  API  version  number targeted.  This will be the same value as
2921       the CMAKE_SYSTEM_VERSION variable for Android platforms.
2922
2923   CMAKE_ANDROID_API_MIN
2924       Default value for the ANDROID_API_MIN target property.  See that target
2925       property for additional information.
2926
2927   CMAKE_ANDROID_ARCH
2928       When Cross Compiling for Android with NVIDIA Nsight Tegra Visual Studio
2929       Edition, this variable may be set to specify the default value for  the
2930       ANDROID_ARCH  target property.  See that target property for additional
2931       information.
2932
2933       Otherwise, when Cross Compiling for Android, this variable provides the
2934       name  of  the  Android  architecture  corresponding to the value of the
2935       CMAKE_ANDROID_ARCH_ABI variable.  The architecture name may be one of:
2936
2937       · arm
2938
2939       · arm64
2940
2941       · mips
2942
2943       · mips64
2944
2945       · x86
2946
2947       · x86_64
2948
2949   CMAKE_ANDROID_ARCH_ABI
2950       When Cross Compiling for Android, this variable  specifies  the  target
2951       architecture and ABI to be used.  Valid values are:
2952
2953       · arm64-v8a
2954
2955       · armeabi-v7a
2956
2957       · armeabi-v6
2958
2959       · armeabi
2960
2961       · mips
2962
2963       · mips64
2964
2965       · x86
2966
2967       · x86_64
2968
2969       See  also  the  CMAKE_ANDROID_ARM_MODE and CMAKE_ANDROID_ARM_NEON vari‐
2970       ables.
2971
2972   CMAKE_ANDROID_ARM_MODE
2973       When Cross Compiling for Android and CMAKE_ANDROID_ARCH_ABI is  set  to
2974       one  of  the armeabi architectures, set CMAKE_ANDROID_ARM_MODE to ON to
2975       target 32-bit ARM processors (-marm).  Otherwise,  the  default  is  to
2976       target the 16-bit Thumb processors (-mthumb).
2977
2978   CMAKE_ANDROID_ARM_NEON
2979       When  Cross  Compiling for Android and CMAKE_ANDROID_ARCH_ABI is set to
2980       armeabi-v7a  set  CMAKE_ANDROID_ARM_NEON  to  ON  to  target  ARM  NEON
2981       devices.
2982
2983   CMAKE_ANDROID_ASSETS_DIRECTORIES
2984       Default  value for the ANDROID_ASSETS_DIRECTORIES target property.  See
2985       that target property for additional information.
2986
2987   CMAKE_ANDROID_GUI
2988       Default value for the ANDROID_GUI target property of executables.   See
2989       that target property for additional information.
2990
2991   CMAKE_ANDROID_JAR_DEPENDENCIES
2992       Default  value  for  the ANDROID_JAR_DEPENDENCIES target property.  See
2993       that target property for additional information.
2994
2995   CMAKE_ANDROID_JAR_DIRECTORIES
2996       Default value for the  ANDROID_JAR_DIRECTORIES  target  property.   See
2997       that target property for additional information.
2998
2999   CMAKE_ANDROID_JAVA_SOURCE_DIR
3000       Default  value  for  the  ANDROID_JAVA_SOURCE_DIR target property.  See
3001       that target property for additional information.
3002
3003   CMAKE_ANDROID_NATIVE_LIB_DEPENDENCIES
3004       Default value for the ANDROID_NATIVE_LIB_DEPENDENCIES target  property.
3005       See that target property for additional information.
3006
3007   CMAKE_ANDROID_NATIVE_LIB_DIRECTORIES
3008       Default  value  for the ANDROID_NATIVE_LIB_DIRECTORIES target property.
3009       See that target property for additional information.
3010
3011   CMAKE_ANDROID_NDK
3012       When Cross Compiling for Android with the NDK, this variable holds  the
3013       absolute  path  to  the  root directory of the NDK.  The directory must
3014       contain a platforms subdirectory holding the android-<api> directories.
3015
3016   CMAKE_ANDROID_NDK_DEPRECATED_HEADERS
3017       When Cross Compiling for Android with the NDK, this variable may be set
3018       to  specify whether to use the deprecated per-api-level headers instead
3019       of the unified headers.
3020
3021       If not specified, the default will be false if using a NDK version that
3022       provides the unified headers and true otherwise.
3023
3024   CMAKE_ANDROID_NDK_TOOLCHAIN_HOST_TAG
3025       When  Cross  Compiling for Android with the NDK, this variable provides
3026       the NDK’s “host tag” used to construct the path to prebuilt  toolchains
3027       that run on the host.
3028
3029   CMAKE_ANDROID_NDK_TOOLCHAIN_VERSION
3030       When Cross Compiling for Android with the NDK, this variable may be set
3031       to specify the version of the toolchain to be used as the compiler.
3032
3033       On NDK r19 or above, this variable must be unset or set to clang.
3034
3035       On NDK r18 or below, this variable must be set to one of these forms:
3036
3037       · <major>.<minor>: GCC of specified version
3038
3039       · clang<major>.<minor>: Clang of specified version
3040
3041       · clang: Clang of most recent available version
3042
3043       A toolchain of the requested version will be selected automatically  to
3044       match the ABI named in the CMAKE_ANDROID_ARCH_ABI variable.
3045
3046       If  not  specified, the default will be a value that selects the latest
3047       available GCC toolchain.
3048
3049   CMAKE_ANDROID_PROCESS_MAX
3050       Default value for the ANDROID_PROCESS_MAX target  property.   See  that
3051       target property for additional information.
3052
3053   CMAKE_ANDROID_PROGUARD
3054       Default  value for the ANDROID_PROGUARD target property.  See that tar‐
3055       get property for additional information.
3056
3057   CMAKE_ANDROID_PROGUARD_CONFIG_PATH
3058       Default value for  the  ANDROID_PROGUARD_CONFIG_PATH  target  property.
3059       See that target property for additional information.
3060
3061   CMAKE_ANDROID_SECURE_PROPS_PATH
3062       Default  value  for the ANDROID_SECURE_PROPS_PATH target property.  See
3063       that target property for additional information.
3064
3065   CMAKE_ANDROID_SKIP_ANT_STEP
3066       Default value for the ANDROID_SKIP_ANT_STEP target property.  See  that
3067       target property for additional information.
3068
3069   CMAKE_ANDROID_STANDALONE_TOOLCHAIN
3070       When  Cross  Compiling  for  Android  with a Standalone Toolchain, this
3071       variable  holds  the  absolute  path  to  the  root  directory  of  the
3072       toolchain.   The  specified  directory must contain a sysroot subdirec‐
3073       tory.
3074
3075   CMAKE_ANDROID_STL_TYPE
3076       When Cross Compiling for Android with NVIDIA Nsight Tegra Visual Studio
3077       Edition,  this variable may be set to specify the default value for the
3078       ANDROID_STL_TYPE target property.  See that target property  for  addi‐
3079       tional information.
3080
3081       When Cross Compiling for Android with the NDK, this variable may be set
3082       to specify the STL variant to be used.  The value may be one of:
3083
3084       none   No C++ Support
3085
3086       system Minimal C++ without STL
3087
3088       gabi++_static
3089              GAbi++ Static
3090
3091       gabi++_shared
3092              GAbi++ Shared
3093
3094       gnustl_static
3095              GNU libstdc++ Static
3096
3097       gnustl_shared
3098              GNU libstdc++ Shared
3099
3100       c++_static
3101              LLVM libc++ Static
3102
3103       c++_shared
3104              LLVM libc++ Shared
3105
3106       stlport_static
3107              STLport Static
3108
3109       stlport_shared
3110              STLport Shared
3111
3112       The default value is gnustl_static on NDK versions that provide it  and
3113       otherwise  c++_static.   Note that this default differs from the native
3114       NDK build system because CMake  may  be  used  to  build  projects  for
3115       Android  that are not natively implemented for it and use the C++ stan‐
3116       dard library.
3117
3118   CMAKE_ARCHIVE_OUTPUT_DIRECTORY
3119       Where to put all the ARCHIVE target files when built.
3120
3121       This variable is used to initialize the ARCHIVE_OUTPUT_DIRECTORY  prop‐
3122       erty  on  all  the  targets.   See  that target property for additional
3123       information.
3124
3125   CMAKE_ARCHIVE_OUTPUT_DIRECTORY_<CONFIG>
3126       Where to put all the ARCHIVE target files when  built  for  a  specific
3127       configuration.
3128
3129       This  variable is used to initialize the ARCHIVE_OUTPUT_DIRECTORY_<CON‐
3130       FIG> property on all the targets.  See that target property  for  addi‐
3131       tional information.
3132
3133   CMAKE_AUTOGEN_ORIGIN_DEPENDS
3134       Switch  for  forwarding origin target dependencies to the corresponding
3135       _autogen targets.
3136
3137       This variable is used to initialize the AUTOGEN_ORIGIN_DEPENDS property
3138       on  all  the targets.  See that target property for additional informa‐
3139       tion.
3140
3141       By default CMAKE_AUTOGEN_ORIGIN_DEPENDS is ON.
3142
3143   CMAKE_AUTOGEN_PARALLEL
3144       Number of parallel moc or uic processes to start when using AUTOMOC and
3145       AUTOUIC.
3146
3147       This  variable  is  used to initialize the AUTOGEN_PARALLEL property on
3148       all the targets.  See that target property for additional information.
3149
3150       By default CMAKE_AUTOGEN_PARALLEL is unset.
3151
3152   CMAKE_AUTOGEN_VERBOSE
3153       Sets the verbosity of AUTOMOC, AUTOUIC and AUTORCC.  A positive integer
3154       value  or  a  true boolean value lets the AUTO* generators output addi‐
3155       tional processing information.
3156
3157       Setting CMAKE_AUTOGEN_VERBOSE has the same effect as setting  the  VER‐
3158       BOSE  environment variable during generation (e.g. by calling make VER‐
3159       BOSE=1).  The extra  verbosity  is  limited  to  the  AUTO*  generators
3160       though.
3161
3162       By default CMAKE_AUTOGEN_VERBOSE is unset.
3163
3164   CMAKE_AUTOMOC
3165       Whether to handle moc automatically for Qt targets.
3166
3167       This  variable  is  used  to initialize the AUTOMOC property on all the
3168       targets.  See that target property for additional information.
3169
3170   CMAKE_AUTOMOC_COMPILER_PREDEFINES
3171       This variable is used  to  initialize  the  AUTOMOC_COMPILER_PREDEFINES
3172       property  on  all  the targets. See that target property for additional
3173       information.
3174
3175       By default it is ON.
3176
3177   CMAKE_AUTOMOC_DEPEND_FILTERS
3178       Filter definitions used by CMAKE_AUTOMOC to  extract  file  names  from
3179       source code as additional dependencies for the moc file.
3180
3181       This variable is used to initialize the AUTOMOC_DEPEND_FILTERS property
3182       on all the targets. See that target property  for  additional  informa‐
3183       tion.
3184
3185       By default it is empty.
3186
3187   CMAKE_AUTOMOC_MACRO_NAMES
3188       Semicolon-separated  list  list of macro names used by CMAKE_AUTOMOC to
3189       determine if a C++ file needs to be processed by moc.
3190
3191       This variable is used to initialize the AUTOMOC_MACRO_NAMES property on
3192       all the targets. See that target property for additional information.
3193
3194       The default value is Q_OBJECT;Q_GADGET;Q_NAMESPACE.
3195
3196   Example
3197       Let  CMake know that source files that contain CUSTOM_MACRO must be moc
3198       processed as well:
3199
3200          set(CMAKE_AUTOMOC ON)
3201          list(APPEND CMAKE_AUTOMOC_MACRO_NAMES "CUSTOM_MACRO")
3202
3203   CMAKE_AUTOMOC_MOC_OPTIONS
3204       Additional options for moc when using CMAKE_AUTOMOC.
3205
3206       This variable is used to initialize the AUTOMOC_MOC_OPTIONS property on
3207       all the targets.  See that target property for additional information.
3208
3209   CMAKE_AUTOMOC_PATH_PREFIX
3210       Whether  to  generate  the  -p  path  prefix  option for moc on AUTOMOC
3211       enabled Qt targets.
3212
3213       This variable is used to initialize the AUTOMOC_PATH_PREFIX property on
3214       all the targets.  See that target property for additional information.
3215
3216       The default value is ON.
3217
3218   CMAKE_AUTORCC
3219       Whether to handle rcc automatically for Qt targets.
3220
3221       This  variable  is  used  to initialize the AUTORCC property on all the
3222       targets.  See that target property for additional information.
3223
3224   CMAKE_AUTORCC_OPTIONS
3225       Additional options for rcc when using CMAKE_AUTORCC.
3226
3227       This variable is used to initialize the AUTORCC_OPTIONS property on all
3228       the targets.  See that target property for additional information.
3229
3230   EXAMPLE
3231          # ...
3232          set(CMAKE_AUTORCC_OPTIONS "--compress;9")
3233          # ...
3234
3235   CMAKE_AUTOUIC
3236       Whether to handle uic automatically for Qt targets.
3237
3238       This  variable  is  used  to initialize the AUTOUIC property on all the
3239       targets.  See that target property for additional information.
3240
3241   CMAKE_AUTOUIC_OPTIONS
3242       Additional options for uic when using CMAKE_AUTOUIC.
3243
3244       This variable is used to initialize the AUTOUIC_OPTIONS property on all
3245       the targets.  See that target property for additional information.
3246
3247   EXAMPLE
3248          # ...
3249          set_property(CMAKE_AUTOUIC_OPTIONS "--no-protection")
3250          # ...
3251
3252   CMAKE_AUTOUIC_SEARCH_PATHS
3253       Search path list used by CMAKE_AUTOUIC to find included .ui files.
3254
3255       This  variable  is used to initialize the AUTOUIC_SEARCH_PATHS property
3256       on all the targets. See that target property  for  additional  informa‐
3257       tion.
3258
3259       By default it is empty.
3260
3261   CMAKE_BUILD_RPATH
3262       Semicolon-separated list specifying runtime path (RPATH) entries to add
3263       to binaries linked in the build tree (for platforms that  support  it).
3264       The  entries  will  not  be used for binaries in the install tree.  See
3265       also the CMAKE_INSTALL_RPATH variable.
3266
3267       This is used to initialize the BUILD_RPATH target property for all tar‐
3268       gets.
3269
3270   CMAKE_BUILD_RPATH_USE_ORIGIN
3271       Whether to use relative paths for the build RPATH.
3272
3273       This  is  used to initialize the BUILD_RPATH_USE_ORIGIN target property
3274       for all targets, see that property for more details.
3275
3276   CMAKE_BUILD_WITH_INSTALL_NAME_DIR
3277       Whether to use INSTALL_NAME_DIR on targets in the build tree.
3278
3279       This variable is used  to  initialize  the  BUILD_WITH_INSTALL_NAME_DIR
3280       property on all targets.
3281
3282   CMAKE_BUILD_WITH_INSTALL_RPATH
3283       Use the install path for the RPATH.
3284
3285       Normally CMake uses the build tree for the RPATH when building executa‐
3286       bles etc on systems that use RPATH.  When the software is installed the
3287       executables  etc  are  relinked by CMake to have the install RPATH.  If
3288       this variable is set to true then the software is always built with the
3289       install  path  for  the  RPATH  and  does  not need to be relinked when
3290       installed.
3291
3292   CMAKE_COMPILE_PDB_OUTPUT_DIRECTORY
3293       Output directory for MS debug symbol .pdb files generated by  the  com‐
3294       piler while building source files.
3295
3296       This  variable  is  used to initialize the COMPILE_PDB_OUTPUT_DIRECTORY
3297       property on all the targets.
3298
3299   CMAKE_COMPILE_PDB_OUTPUT_DIRECTORY_<CONFIG>
3300       Per-configuration output directory for MS debug symbol .pdb files  gen‐
3301       erated by the compiler while building source files.
3302
3303       This  is a per-configuration version of CMAKE_COMPILE_PDB_OUTPUT_DIREC‐
3304       TORY.   This  variable  is  used  to  initialize  the  COMPILE_PDB_OUT‐
3305       PUT_DIRECTORY_<CONFIG> property on all the targets.
3306
3307   CMAKE_<CONFIG>_POSTFIX
3308       Default filename postfix for libraries under configuration <CONFIG>.
3309
3310       When  a  non-executable  target  is created its <CONFIG>_POSTFIX target
3311       property is initialized with the value of this variable if it is set.
3312
3313   CMAKE_CUDA_SEPARABLE_COMPILATION
3314       Default value for  CUDA_SEPARABLE_COMPILATION  target  property.   This
3315       variable  is  used  to  initialize the property on each target as it is
3316       created.
3317
3318   CMAKE_CUDA_RESOLVE_DEVICE_SYMBOLS
3319       Default value for  CUDA_RESOLVE_DEVICE_SYMBOLS  target  property.  This
3320       variable  is  used  to  initialize the property on each target as it is
3321       created.
3322
3323   CMAKE_DEBUG_POSTFIX
3324       See variable CMAKE_<CONFIG>_POSTFIX.
3325
3326       This variable  is  a  special  case  of  the  more-general  CMAKE_<CON‐
3327       FIG>_POSTFIX variable for the DEBUG configuration.
3328
3329   CMAKE_DISABLE_PRECOMPILE_HEADERS
3330       Default value for DISABLE_PRECOMPILE_HEADERS of targets.
3331
3332       By default CMAKE_DISABLE_PRECOMPILE_HEADERS is OFF.
3333
3334   CMAKE_ENABLE_EXPORTS
3335       Specify whether executables export symbols for loadable modules.
3336
3337       This  variable is used to initialize the ENABLE_EXPORTS target property
3338       for executable targets when they are created by calls to  the  add_exe‐
3339       cutable() command.  See the property documentation for details.
3340
3341   CMAKE_EXE_LINKER_FLAGS
3342       Linker flags to be used to create executables.
3343
3344       These flags will be used by the linker when creating an executable.
3345
3346   CMAKE_EXE_LINKER_FLAGS_<CONFIG>
3347       Flags to be used when linking an executable.
3348
3349       Same  as  CMAKE_C_FLAGS_* but used by the linker when creating executa‐
3350       bles.
3351
3352   CMAKE_EXE_LINKER_FLAGS_<CONFIG>_INIT
3353       Value used  to  initialize  the  CMAKE_EXE_LINKER_FLAGS_<CONFIG>  cache
3354       entry  the  first  time  a  build tree is configured.  This variable is
3355       meant to be set by a toolchain file.  CMake may prepend or append  con‐
3356       tent to the value based on the environment and target platform.
3357
3358       See also CMAKE_EXE_LINKER_FLAGS_INIT.
3359
3360   CMAKE_EXE_LINKER_FLAGS_INIT
3361       Value  used  to  initialize  the CMAKE_EXE_LINKER_FLAGS cache entry the
3362       first time a build tree is configured.  This variable is  meant  to  be
3363       set  by  a  toolchain file.  CMake may prepend or append content to the
3364       value based on the environment and target platform.
3365
3366       See       also        the        configuration-specific        variable
3367       CMAKE_EXE_LINKER_FLAGS_<CONFIG>_INIT.
3368
3369   CMAKE_FOLDER
3370       Set the folder name. Use to organize targets in an IDE.
3371
3372       This variable is used to initialize the FOLDER property on all the tar‐
3373       gets.  See that target property for additional information.
3374
3375   CMAKE_FRAMEWORK
3376       Default value for FRAMEWORK of targets.
3377
3378       This variable is used to initialize the FRAMEWORK property on  all  the
3379       targets.  See that target property for additional information.
3380
3381   CMAKE_Fortran_FORMAT
3382       Set to FIXED or FREE to indicate the Fortran source layout.
3383
3384       This  variable is used to initialize the Fortran_FORMAT property on all
3385       the targets.  See that target property for additional information.
3386
3387   CMAKE_Fortran_MODULE_DIRECTORY
3388       Fortran module output directory.
3389
3390       This variable is used to initialize the Fortran_MODULE_DIRECTORY  prop‐
3391       erty  on  all  the  targets.   See  that target property for additional
3392       information.
3393
3394   CMAKE_GHS_NO_SOURCE_GROUP_FILE
3395       ON / OFF boolean to control if the project file for a target should  be
3396       one  single  file or multiple files.  Refer to GHS_NO_SOURCE_GROUP_FILE
3397       for further details.
3398
3399   CMAKE_GLOBAL_AUTOGEN_TARGET
3400       Switch to enable generation of a global autogen target.
3401
3402       When CMAKE_GLOBAL_AUTORCC_TARGET is enabled, a custom target autogen is
3403       generated.   This  target  depends on all AUTOMOC and AUTOUIC generated
3404       <ORIGIN>_autogen targets in the project.  By building the global  auto‐
3405       gen target, all AUTOMOC and AUTOUIC files in the project will be gener‐
3406       ated.
3407
3408       The name of the  global  autogen  target  can  be  changed  by  setting
3409       CMAKE_GLOBAL_AUTOGEN_TARGET_NAME.
3410
3411       By default CMAKE_GLOBAL_AUTOGEN_TARGET is unset.
3412
3413       See the cmake-qt(7) manual for more information on using CMake with Qt.
3414
3415   Note
3416       <ORIGIN>_autogen  targets  by  default  inherit  their  origin target’s
3417       dependencies.  This might result in unintended dependency target builds
3418       when only <ORIGIN>_autogen targets are built.  A solution is to disable
3419       AUTOGEN_ORIGIN_DEPENDS on the respective origin targets.
3420
3421   CMAKE_GLOBAL_AUTOGEN_TARGET_NAME
3422       Change the name of the global autogen target.
3423
3424       When CMAKE_GLOBAL_AUTOGEN_TARGET is enabled,  a  global  custom  target
3425       named  autogen  is created.  CMAKE_GLOBAL_AUTOGEN_TARGET_NAME allows to
3426       set a different name for that target.
3427
3428       By default CMAKE_GLOBAL_AUTOGEN_TARGET_NAME is unset.
3429
3430       See the cmake-qt(7) manual for more information on using CMake with Qt.
3431
3432   CMAKE_GLOBAL_AUTORCC_TARGET
3433       Switch to enable generation of a global autorcc target.
3434
3435       When CMAKE_GLOBAL_AUTORCC_TARGET is enabled, a custom target autorcc is
3436       generated.   This   target  depends  on  all  AUTORCC  generated  <ORI‐
3437       GIN>_arcc_<QRC> targets in the project.  By building the global autorcc
3438       target, all AUTORCC files in the project will be generated.
3439
3440       The  name  of  the  global  autorcc  target  can  be changed by setting
3441       CMAKE_GLOBAL_AUTORCC_TARGET_NAME.
3442
3443       By default CMAKE_GLOBAL_AUTORCC_TARGET is unset.
3444
3445       See the cmake-qt(7) manual for more information on using CMake with Qt.
3446
3447   CMAKE_GLOBAL_AUTORCC_TARGET_NAME
3448       Change the name of the global autorcc target.
3449
3450       When CMAKE_GLOBAL_AUTORCC_TARGET is enabled,  a  global  custom  target
3451       named  autorcc  is created.  CMAKE_GLOBAL_AUTORCC_TARGET_NAME allows to
3452       set a different name for that target.
3453
3454       By default CMAKE_GLOBAL_AUTOGEN_TARGET_NAME is unset.
3455
3456       See the cmake-qt(7) manual for more information on using CMake with Qt.
3457
3458   CMAKE_GNUtoMS
3459       Convert GNU import libraries (.dll.a) to MS format (.lib).
3460
3461       This variable is used to initialize the  GNUtoMS  property  on  targets
3462       when  they are created.  See that target property for additional infor‐
3463       mation.
3464
3465   CMAKE_INCLUDE_CURRENT_DIR
3466       Automatically add the current  source  and  build  directories  to  the
3467       include path.
3468
3469       If  this  variable  is  enabled,  CMake  automatically  adds CMAKE_CUR‐
3470       RENT_SOURCE_DIR and CMAKE_CURRENT_BINARY_DIR to the  include  path  for
3471       each  directory.  These additional include directories do not propagate
3472       down to  subdirectories.   This  is  useful  mainly  for  out-of-source
3473       builds, where files generated into the build tree are included by files
3474       located in the source tree.
3475
3476       By default CMAKE_INCLUDE_CURRENT_DIR is OFF.
3477
3478   CMAKE_INCLUDE_CURRENT_DIR_IN_INTERFACE
3479       Automatically add the current  source  and  build  directories  to  the
3480       INTERFACE_INCLUDE_DIRECTORIES target property.
3481
3482       If  this  variable is enabled, CMake automatically adds for each shared
3483       library target, static library target,  module  target  and  executable
3484       target,  CMAKE_CURRENT_SOURCE_DIR  and  CMAKE_CURRENT_BINARY_DIR to the
3485       INTERFACE_INCLUDE_DIRECTORIES    target    property.     By     default
3486       CMAKE_INCLUDE_CURRENT_DIR_IN_INTERFACE is OFF.
3487
3488   CMAKE_INSTALL_NAME_DIR
3489       macOS directory name for installed targets.
3490
3491       CMAKE_INSTALL_NAME_DIR is used to initialize the INSTALL_NAME_DIR prop‐
3492       erty on all targets.  See that target property for more information.
3493
3494   CMAKE_INSTALL_REMOVE_ENVIRONMENT_RPATH
3495       Sets the default for whether toolchain-defined rpaths should be removed
3496       during installation.
3497
3498       CMAKE_INSTALL_REMOVE_ENVIRONMENT_RPATH  is  a boolean that provides the
3499       default value for the INSTALL_REMOVE_ENVIRONMENT_RPATH property of  all
3500       subsequently created targets.
3501
3502   CMAKE_INSTALL_RPATH
3503       The rpath to use for installed targets.
3504
3505       A  semicolon-separated  list  specifying  the rpath to use in installed
3506       targets (for platforms that support it).  This is  used  to  initialize
3507       the target property INSTALL_RPATH for all targets.
3508
3509   CMAKE_INSTALL_RPATH_USE_LINK_PATH
3510       Add paths to linker search and installed rpath.
3511
3512       CMAKE_INSTALL_RPATH_USE_LINK_PATH is a boolean that if set to true will
3513       append directories in the linker search path and outside the project to
3514       the  INSTALL_RPATH.   This  is  used  to initialize the target property
3515       INSTALL_RPATH_USE_LINK_PATH for all targets.
3516
3517   CMAKE_INTERPROCEDURAL_OPTIMIZATION
3518       Default value for INTERPROCEDURAL_OPTIMIZATION of targets.
3519
3520       This variable is used to  initialize  the  INTERPROCEDURAL_OPTIMIZATION
3521       property  on  all the targets.  See that target property for additional
3522       information.
3523
3524   CMAKE_INTERPROCEDURAL_OPTIMIZATION_<CONFIG>
3525       Default value for INTERPROCEDURAL_OPTIMIZATION_<CONFIG> of targets.
3526
3527       This variable  is  used  to  initialize  the  INTERPROCEDURAL_OPTIMIZA‐
3528       TION_<CONFIG>  property  on  all the targets.  See that target property
3529       for additional information.
3530
3531   CMAKE_IOS_INSTALL_COMBINED
3532       Default value for IOS_INSTALL_COMBINED of targets.
3533
3534       This variable is used to initialize the  IOS_INSTALL_COMBINED  property
3535       on  all  the targets.  See that target property for additional informa‐
3536       tion.
3537
3538   CMAKE_<LANG>_CLANG_TIDY
3539       Default value for <LANG>_CLANG_TIDY target property when <LANG> is C or
3540       CXX.
3541
3542       This  variable  is used to initialize the property on each target as it
3543       is created.  For example:
3544
3545          set(CMAKE_CXX_CLANG_TIDY clang-tidy -checks=-*,readability-*)
3546          add_executable(foo foo.cxx)
3547
3548   CMAKE_<LANG>_COMPILER_LAUNCHER
3549       Default value for <LANG>_COMPILER_LAUNCHER target property.  This vari‐
3550       able  is  used  to initialize the property on each target as it is cre‐
3551       ated.  This is done only when <LANG> is C, CXX, Fortran, or CUDA.
3552
3553   CMAKE_<LANG>_CPPCHECK
3554       Default value for <LANG>_CPPCHECK target  property.  This  variable  is
3555       used  to initialize the property on each target as it is created.  This
3556       is done only when <LANG> is C or CXX.
3557
3558   CMAKE_<LANG>_CPPLINT
3559       Default value for <LANG>_CPPLINT target property. This variable is used
3560       to  initialize  the  property on each target as it is created.  This is
3561       done only when <LANG> is C or CXX.
3562
3563   CMAKE_<LANG>_INCLUDE_WHAT_YOU_USE
3564       Default value for <LANG>_INCLUDE_WHAT_YOU_USE  target  property.   This
3565       variable  is  used  to  initialize the property on each target as it is
3566       created.  This is done only when <LANG> is C or CXX.
3567
3568   CMAKE_<LANG>_LINK_LIBRARY_FILE_FLAG
3569       Language-specific flag to be used to link a library specified by a path
3570       to its file.
3571
3572       The  flag  will  be  used  before  a  library file path is given to the
3573       linker.  This is needed only on very few platforms.
3574
3575   CMAKE_<LANG>_LINK_LIBRARY_FLAG
3576       Flag to be used to link a library into a shared library or executable.
3577
3578       This flag will be used to specify a library to link to a shared library
3579       or  an executable for the specific language.  On most compilers this is
3580       -l.
3581
3582   CMAKE_<LANG>_VISIBILITY_PRESET
3583       Default value for the <LANG>_VISIBILITY_PRESET target property  when  a
3584       target is created.
3585
3586   CMAKE_LIBRARY_OUTPUT_DIRECTORY
3587       Where to put all the LIBRARY target files when built.
3588
3589       This  variable is used to initialize the LIBRARY_OUTPUT_DIRECTORY prop‐
3590       erty on all the targets.   See  that  target  property  for  additional
3591       information.
3592
3593   CMAKE_LIBRARY_OUTPUT_DIRECTORY_<CONFIG>
3594       Where  to  put  all  the LIBRARY target files when built for a specific
3595       configuration.
3596
3597       This variable is used to initialize the  LIBRARY_OUTPUT_DIRECTORY_<CON‐
3598       FIG>  property  on all the targets.  See that target property for addi‐
3599       tional information.
3600
3601   CMAKE_LIBRARY_PATH_FLAG
3602       The flag to be used to add a library search path to a compiler.
3603
3604       The flag will be used to specify a library directory to  the  compiler.
3605       On most compilers this is -L.
3606
3607   CMAKE_LINK_DEF_FILE_FLAG
3608       Linker flag to be used to specify a .def file for dll creation.
3609
3610       The  flag  will  be used to add a .def file when creating a dll on Win‐
3611       dows; this is only defined on Windows.
3612
3613   CMAKE_LINK_DEPENDS_NO_SHARED
3614       Whether to skip link dependencies on shared library files.
3615
3616       This variable initializes the LINK_DEPENDS_NO_SHARED property  on  tar‐
3617       gets  when  they  are created.  See that target property for additional
3618       information.
3619
3620   CMAKE_LINK_INTERFACE_LIBRARIES
3621       Default value for LINK_INTERFACE_LIBRARIES of targets.
3622
3623       This variable is used to initialize the LINK_INTERFACE_LIBRARIES  prop‐
3624       erty  on  all  the  targets.   See  that target property for additional
3625       information.
3626
3627   CMAKE_LINK_LIBRARY_FILE_FLAG
3628       Flag to be used to link a library specified by a path to its file.
3629
3630       The flag will be used before a  library  file  path  is  given  to  the
3631       linker.  This is needed only on very few platforms.
3632
3633   CMAKE_LINK_LIBRARY_FLAG
3634       Flag to be used to link a library into an executable.
3635
3636       The  flag  will  be used to specify a library to link to an executable.
3637       On most compilers this is -l.
3638
3639   CMAKE_LINK_WHAT_YOU_USE
3640       Default value for LINK_WHAT_YOU_USE target property.  This variable  is
3641       used to initialize the property on each target as it is created.
3642
3643   CMAKE_MACOSX_BUNDLE
3644       Default value for MACOSX_BUNDLE of targets.
3645
3646       This  variable  is used to initialize the MACOSX_BUNDLE property on all
3647       the targets.  See that target property for additional information.
3648
3649       This variable is set to ON by default if  CMAKE_SYSTEM_NAME  equals  to
3650       iOS, tvOS or watchOS.
3651
3652   CMAKE_MACOSX_RPATH
3653       Whether to use rpaths on macOS and iOS.
3654
3655       This  variable  is  used to initialize the MACOSX_RPATH property on all
3656       targets.
3657
3658   CMAKE_MAP_IMPORTED_CONFIG_<CONFIG>
3659       Default value for MAP_IMPORTED_CONFIG_<CONFIG> of targets.
3660
3661       This variable is used to  initialize  the  MAP_IMPORTED_CONFIG_<CONFIG>
3662       property  on  all the targets.  See that target property for additional
3663       information.
3664
3665   CMAKE_MODULE_LINKER_FLAGS
3666       Linker flags to be used to create modules.
3667
3668       These flags will be used by the linker when creating a module.
3669
3670   CMAKE_MODULE_LINKER_FLAGS_<CONFIG>
3671       Flags to be used when linking a module.
3672
3673       Same as CMAKE_C_FLAGS_* but used by the linker when creating modules.
3674
3675   CMAKE_MODULE_LINKER_FLAGS_<CONFIG>_INIT
3676       Value used to initialize the  CMAKE_MODULE_LINKER_FLAGS_<CONFIG>  cache
3677       entry  the  first  time  a  build tree is configured.  This variable is
3678       meant to be set by a toolchain file.  CMake may prepend or append  con‐
3679       tent to the value based on the environment and target platform.
3680
3681       See also CMAKE_MODULE_LINKER_FLAGS_INIT.
3682
3683   CMAKE_MODULE_LINKER_FLAGS_INIT
3684       Value  used to initialize the CMAKE_MODULE_LINKER_FLAGS cache entry the
3685       first time a build tree is configured.  This variable is  meant  to  be
3686       set  by  a  toolchain file.  CMake may prepend or append content to the
3687       value based on the environment and target platform.
3688
3689       See    also    the    configuration-specific    variable     CMAKE_MOD‐
3690       ULE_LINKER_FLAGS_<CONFIG>_INIT.
3691
3692   CMAKE_MSVCIDE_RUN_PATH
3693       Extra PATH locations that should be used when executing add_custom_com‐
3694       mand() or add_custom_target() when using the Visual Studio 9  2008  (or
3695       above) generator. This allows for running commands and using dll’s that
3696       the IDE environment is not aware of.
3697
3698       If not set explicitly  the  value  is  initialized  by  the  CMAKE_MSV‐
3699       CIDE_RUN_PATH environment variable, if set, and otherwise left empty.
3700
3701   CMAKE_MSVC_RUNTIME_LIBRARY
3702       Select the MSVC runtime library for use by compilers targeting the MSVC
3703       ABI.  This variable is  used  to  initialize  the  MSVC_RUNTIME_LIBRARY
3704       property  on all targets as they are created.  It is also propagated by
3705       calls to the try_compile() command into the test project.
3706
3707       The allowed values are:
3708
3709       MultiThreaded
3710              Compile with -MT or equivalent flag(s) to use  a  multi-threaded
3711              statically-linked runtime library.
3712
3713       MultiThreadedDLL
3714              Compile  with  -MD or equivalent flag(s) to use a multi-threaded
3715              dynamically-linked runtime library.
3716
3717       MultiThreadedDebug
3718              Compile with -MTd or equivalent flag(s) to use a  multi-threaded
3719              statically-linked runtime library.
3720
3721       MultiThreadedDebugDLL
3722              Compile  with -MDd or equivalent flag(s) to use a multi-threaded
3723              dynamically-linked runtime library.
3724
3725       The value is ignored on non-MSVC compilers  but  an  unsupported  value
3726       will  be  rejected as an error when using a compiler targeting the MSVC
3727       ABI.
3728
3729       The value may also be the empty string ("") in which  case  no  runtime
3730       library  selection  flag  will be added explicitly by CMake.  Note that
3731       with Visual Studio Generators the native build system may choose to add
3732       its own default runtime library selection flag.
3733
3734       Use  generator  expressions to support per-configuration specification.
3735       For example, the code:
3736
3737          set(CMAKE_MSVC_RUNTIME_LIBRARY "MultiThreaded$<$<CONFIG:Debug>:Debug>")
3738
3739       selects for all following targets  a  multi-threaded  statically-linked
3740       runtime library with or without debug information depending on the con‐
3741       figuration.
3742
3743       If this variable is not set then the MSVC_RUNTIME_LIBRARY target  prop‐
3744       erty  will  not be set automatically.  If that property is not set then
3745       CMake uses the default  value  MultiThreaded$<$<CONFIG:Debug>:Debug>DLL
3746       to select a MSVC runtime library.
3747
3748       NOTE:
3749          This  variable  has  effect  only  when policy CMP0091 is set to NEW
3750          prior to the  first  project()  or  enable_language()  command  that
3751          enables a language using a compiler targeting the MSVC ABI.
3752
3753   CMAKE_NINJA_OUTPUT_PATH_PREFIX
3754       Set output files path prefix for the Ninja generator.
3755
3756       Every output files listed in the generated build.ninja will be prefixed
3757       by the contents of this variable (a trailing slash is appended if miss‐
3758       ing).   This  is  useful  when  the generated ninja file is meant to be
3759       embedded as a subninja file into a super ninja project.  For example, a
3760       ninja build file generated with a command like:
3761
3762          cd top-build-dir/sub &&
3763          cmake -G Ninja -DCMAKE_NINJA_OUTPUT_PATH_PREFIX=sub/ path/to/source
3764
3765       can  be  embedded  in  top-build-dir/build.ninja  with a directive like
3766       this:
3767
3768          subninja sub/build.ninja
3769
3770       The auto-regeneration rule in top-build-dir/build.ninja  must  have  an
3771       order-only dependency on sub/build.ninja.
3772
3773       NOTE:
3774          When CMAKE_NINJA_OUTPUT_PATH_PREFIX is set, the project generated by
3775          CMake cannot be used as a standalone project.   No  default  targets
3776          are specified.
3777
3778   CMAKE_NO_BUILTIN_CHRPATH
3779       Do not use the builtin ELF editor to fix RPATHs on installation.
3780
3781       When  an  ELF binary needs to have a different RPATH after installation
3782       than it does in the build tree, CMake uses a builtin editor  to  change
3783       the  RPATH in the installed copy.  If this variable is set to true then
3784       CMake will relink the binary before installation instead of  using  its
3785       builtin editor.
3786
3787   CMAKE_NO_SYSTEM_FROM_IMPORTED
3788       Default value for NO_SYSTEM_FROM_IMPORTED of targets.
3789
3790       This  variable  is used to initialize the NO_SYSTEM_FROM_IMPORTED prop‐
3791       erty on all the targets.   See  that  target  property  for  additional
3792       information.
3793
3794   CMAKE_OSX_ARCHITECTURES
3795       Target specific architectures for macOS and iOS.
3796
3797       This  variable  is used to initialize the OSX_ARCHITECTURES property on
3798       each target as it is created.  See that target property for  additional
3799       information.
3800
3801       The  value  of this variable should be set prior to the first project()
3802       or enable_language() command invocation because it may  influence  con‐
3803       figuration  of  the  toolchain  and  flags.   It  is intended to be set
3804       locally by the user creating a build tree.  This variable should be set
3805       as  a  CACHE  entry  (or  else CMake may remove it while initializing a
3806       cache entry of the same name).
3807
3808       Despite the OSX part in the variable name(s) they apply also  to  other
3809       SDKs than macOS like iOS, tvOS, or watchOS.
3810
3811       This variable is ignored on platforms other than Apple.
3812
3813   CMAKE_OSX_DEPLOYMENT_TARGET
3814       Specify  the minimum version of the target platform (e.g. macOS or iOS)
3815       on which the target binaries are to be deployed.  CMake uses this vari‐
3816       able value for the -mmacosx-version-min flag or their respective target
3817       platform equivalents.  For older Xcode versions that  shipped  multiple
3818       macOS  SDKs  this  variable  also  helps  to  choose  the  SDK  in case
3819       CMAKE_OSX_SYSROOT is unset.
3820
3821       If not set explicitly the value is initialized  by  the  MACOSX_DEPLOY‐
3822       MENT_TARGET  environment variable, if set, and otherwise computed based
3823       on the host platform.
3824
3825       The value of this variable should be set prior to the  first  project()
3826       or  enable_language()  command invocation because it may influence con‐
3827       figuration of the toolchain and  flags.   It  is  intended  to  be  set
3828       locally by the user creating a build tree.  This variable should be set
3829       as a CACHE entry (or else CMake may  remove  it  while  initializing  a
3830       cache entry of the same name).
3831
3832       Despite  the  OSX part in the variable name(s) they apply also to other
3833       SDKs than macOS like iOS, tvOS, or watchOS.
3834
3835       This variable is ignored on platforms other than Apple.
3836
3837   CMAKE_OSX_SYSROOT
3838       Specify the location or name of the macOS  platform  SDK  to  be  used.
3839       CMake  uses  this  value  to compute the value of the -isysroot flag or
3840       equivalent and to help the find_* commands locate files in the SDK.
3841
3842       If not set explicitly the value is initialized by the SDKROOT  environ‐
3843       ment   variable,   if   set,   and  otherwise  computed  based  on  the
3844       CMAKE_OSX_DEPLOYMENT_TARGET or the host platform.
3845
3846       The value of this variable should be set prior to the  first  project()
3847       or  enable_language()  command invocation because it may influence con‐
3848       figuration of the toolchain and  flags.   It  is  intended  to  be  set
3849       locally by the user creating a build tree.  This variable should be set
3850       as a CACHE entry (or else CMake may  remove  it  while  initializing  a
3851       cache entry of the same name).
3852
3853       Despite  the  OSX part in the variable name(s) they apply also to other
3854       SDKs than macOS like iOS, tvOS, or watchOS.
3855
3856       This variable is ignored on platforms other than Apple.
3857
3858   CMAKE_PDB_OUTPUT_DIRECTORY
3859       Output directory for MS debug symbol .pdb files generated by the linker
3860       for executable and shared library targets.
3861
3862       This  variable  is used to initialize the PDB_OUTPUT_DIRECTORY property
3863       on all the targets.  See that target property for  additional  informa‐
3864       tion.
3865
3866   CMAKE_PDB_OUTPUT_DIRECTORY_<CONFIG>
3867       Per-configuration  output directory for MS debug symbol .pdb files gen‐
3868       erated by the linker for executable and shared library targets.
3869
3870       This is  a  per-configuration  version  of  CMAKE_PDB_OUTPUT_DIRECTORY.
3871       This  variable  is used to initialize the PDB_OUTPUT_DIRECTORY_<CONFIG>
3872       property on all the targets.  See that target property  for  additional
3873       information.
3874
3875   CMAKE_POSITION_INDEPENDENT_CODE
3876       Default value for POSITION_INDEPENDENT_CODE of targets.
3877
3878       This variable is used to initialize the POSITION_INDEPENDENT_CODE prop‐
3879       erty on all the targets.   See  that  target  property  for  additional
3880       information.  If set, it’s value is also used by the try_compile() com‐
3881       mand.
3882
3883   CMAKE_RUNTIME_OUTPUT_DIRECTORY
3884       Where to put all the RUNTIME target files when built.
3885
3886       This variable is used to initialize the RUNTIME_OUTPUT_DIRECTORY  prop‐
3887       erty  on  all  the  targets.   See  that target property for additional
3888       information.
3889
3890   CMAKE_RUNTIME_OUTPUT_DIRECTORY_<CONFIG>
3891       Where to put all the RUNTIME target files when  built  for  a  specific
3892       configuration.
3893
3894       This  variable is used to initialize the RUNTIME_OUTPUT_DIRECTORY_<CON‐
3895       FIG> property on all the targets.  See that target property  for  addi‐
3896       tional information.
3897
3898   CMAKE_SHARED_LINKER_FLAGS
3899       Linker flags to be used to create shared libraries.
3900
3901       These flags will be used by the linker when creating a shared library.
3902
3903   CMAKE_SHARED_LINKER_FLAGS_<CONFIG>
3904       Flags to be used when linking a shared library.
3905
3906       Same  as  CMAKE_C_FLAGS_*  but  used by the linker when creating shared
3907       libraries.
3908
3909   CMAKE_SHARED_LINKER_FLAGS_<CONFIG>_INIT
3910       Value used to initialize the  CMAKE_SHARED_LINKER_FLAGS_<CONFIG>  cache
3911       entry  the  first  time  a  build tree is configured.  This variable is
3912       meant to be set by a toolchain file.  CMake may prepend or append  con‐
3913       tent to the value based on the environment and target platform.
3914
3915       See also CMAKE_SHARED_LINKER_FLAGS_INIT.
3916
3917   CMAKE_SHARED_LINKER_FLAGS_INIT
3918       Value  used to initialize the CMAKE_SHARED_LINKER_FLAGS cache entry the
3919       first time a build tree is configured.  This variable is  meant  to  be
3920       set  by  a  toolchain file.  CMake may prepend or append content to the
3921       value based on the environment and target platform.
3922
3923       See       also        the        configuration-specific        variable
3924       CMAKE_SHARED_LINKER_FLAGS_<CONFIG>_INIT.
3925
3926   CMAKE_SKIP_BUILD_RPATH
3927       Do not include RPATHs in the build tree.
3928
3929       Normally CMake uses the build tree for the RPATH when building executa‐
3930       bles etc on systems that use RPATH.  When the software is installed the
3931       executables  etc  are  relinked by CMake to have the install RPATH.  If
3932       this variable is set to true then the software is always built with  no
3933       RPATH.
3934
3935   CMAKE_SKIP_INSTALL_RPATH
3936       Do not include RPATHs in the install tree.
3937
3938       Normally CMake uses the build tree for the RPATH when building executa‐
3939       bles etc on systems that use RPATH.  When the software is installed the
3940       executables  etc  are  relinked by CMake to have the install RPATH.  If
3941       this variable is set to true then  the  software  is  always  installed
3942       without  RPATH,  even  if  RPATH is enabled when building.  This can be
3943       useful for example to allow running tests from the build directory with
3944       RPATH  enabled before the installation step.  To omit RPATH in both the
3945       build and install steps, use CMAKE_SKIP_RPATH instead.
3946
3947   CMAKE_STATIC_LINKER_FLAGS
3948       Flags to be used to create  static  libraries.   These  flags  will  be
3949       passed to the archiver when creating a static library.
3950
3951       See also CMAKE_STATIC_LINKER_FLAGS_<CONFIG>.
3952
3953       NOTE:
3954          Static  libraries  do  not  actually link.  They are essentially ar‐
3955          chives of object files.  The use of the name “linker” in the name of
3956          this variable is kept for compatibility.
3957
3958   CMAKE_STATIC_LINKER_FLAGS_<CONFIG>
3959       Flags  to  be  used  to  create  static libraries.  These flags will be
3960       passed to the archiver when creating a static library in  the  <CONFIG>
3961       configuration.
3962
3963       See also CMAKE_STATIC_LINKER_FLAGS.
3964
3965       NOTE:
3966          Static  libraries  do  not  actually link.  They are essentially ar‐
3967          chives of object files.  The use of the name “linker” in the name of
3968          this variable is kept for compatibility.
3969
3970   CMAKE_STATIC_LINKER_FLAGS_<CONFIG>_INIT
3971       Value  used  to initialize the CMAKE_STATIC_LINKER_FLAGS_<CONFIG> cache
3972       entry the first time a build tree  is  configured.   This  variable  is
3973       meant  to be set by a toolchain file.  CMake may prepend or append con‐
3974       tent to the value based on the environment and target platform.
3975
3976       See also CMAKE_STATIC_LINKER_FLAGS_INIT.
3977
3978   CMAKE_STATIC_LINKER_FLAGS_INIT
3979       Value used to initialize the CMAKE_STATIC_LINKER_FLAGS cache entry  the
3980       first  time  a  build tree is configured.  This variable is meant to be
3981       set by a toolchain file.  CMake may prepend or append  content  to  the
3982       value based on the environment and target platform.
3983
3984       See        also        the        configuration-specific       variable
3985       CMAKE_STATIC_LINKER_FLAGS_<CONFIG>_INIT.
3986
3987   CMAKE_TRY_COMPILE_CONFIGURATION
3988       Build configuration used for try_compile() and try_run() projects.
3989
3990       Projects built by try_compile() and try_run() are  built  synchronously
3991       during  the  CMake configuration step.  Therefore a specific build con‐
3992       figuration must be chosen even if the generated build  system  supports
3993       multiple configurations.
3994
3995   CMAKE_TRY_COMPILE_PLATFORM_VARIABLES
3996       List  of variables that the try_compile() command source file signature
3997       must propagate into the test project in order to target the same  plat‐
3998       form as the host project.
3999
4000       This variable should not be set by project code.  It is meant to be set
4001       by CMake’s platform information modules for the current  toolchain,  or
4002       by a toolchain file when used with CMAKE_TOOLCHAIN_FILE.
4003
4004       Variables  meaningful  to CMake, such as CMAKE_<LANG>_FLAGS, are propa‐
4005       gated automatically.  The CMAKE_TRY_COMPILE_PLATFORM_VARIABLES variable
4006       may  be  set  to  pass custom variables meaningful to a toolchain file.
4007       For example, a toolchain file may contain:
4008
4009          set(CMAKE_SYSTEM_NAME ...)
4010          set(CMAKE_TRY_COMPILE_PLATFORM_VARIABLES MY_CUSTOM_VARIABLE)
4011          # ... use MY_CUSTOM_VARIABLE ...
4012
4013       If a user passes -DMY_CUSTOM_VARIABLE=SomeValue to CMake then this set‐
4014       ting  will  be  made  visible  to  the toolchain file both for the main
4015       project and for test projects generated by  the  try_compile()  command
4016       source file signature.
4017
4018   CMAKE_TRY_COMPILE_TARGET_TYPE
4019       Type  of target generated for try_compile() calls using the source file
4020       signature.  Valid values are:
4021
4022       EXECUTABLE
4023              Use add_executable() to name the source file  in  the  generated
4024              project.  This is the default if no value is given.
4025
4026       STATIC_LIBRARY
4027              Use add_library() with the STATIC option to name the source file
4028              in the generated project.  This avoids running the linker and is
4029              intended  for  use  with  cross-compiling toolchains that cannot
4030              link without custom flags or linker scripts.
4031
4032   CMAKE_UNITY_BUILD
4033       This variable is used to initialize the UNITY_BUILD property of targets
4034       when they are created.  Setting it to true enables batch compilation of
4035       multiple sources within each target.  This feature is known as a  Unity
4036       or Jumbo build.
4037
4038       Projects  should  not  set this variable, it is intended as a developer
4039       control to be set on the cmake(1)  command  line  or  other  equivalent
4040       methods.   The  developer  must  have  the ability to enable or disable
4041       unity builds according to the capabilities of  their  own  machine  and
4042       compiler.
4043
4044       By default, this variable is not set, which will result in unity builds
4045       being disabled.
4046
4047       NOTE:
4048          This option currently does not work well  in  combination  with  the
4049          CMAKE_EXPORT_COMPILE_COMMANDS variable.
4050
4051   CMAKE_UNITY_BUILD_BATCH_SIZE
4052       This variable is used to initialize the UNITY_BUILD_BATCH_SIZE property
4053       of targets when they are created.  It specifies the default upper limit
4054       on  the  number  of  source files that may be combined in any one unity
4055       source file when unity builds are enabled for a target.
4056
4057   CMAKE_USE_RELATIVE_PATHS
4058       This variable has no effect.  The partially implemented effect  it  had
4059       in previous releases was removed in CMake 3.4.
4060
4061   CMAKE_VISIBILITY_INLINES_HIDDEN
4062       Default  value for the VISIBILITY_INLINES_HIDDEN target property when a
4063       target is created.
4064
4065   CMAKE_VS_GLOBALS
4066       List of Key=Value records to be set per  target  as  target  properties
4067       VS_GLOBAL_<variable> with variable=Key and value Value.
4068
4069       For example:
4070
4071          set(CMAKE_VS_GLOBALS
4072            "DefaultLanguage=en-US"
4073            "MinimumVisualStudioVersion=14.0"
4074            )
4075
4076       will    set   properties   VS_GLOBAL_DefaultLanguage   to   en-US   and
4077       VS_GLOBAL_MinimumVisualStudioVersion to 14.0 for  all  targets  (except
4078       for INTERFACE libraries).
4079
4080       This variable is meant to be set by a toolchain file.
4081
4082   CMAKE_VS_INCLUDE_INSTALL_TO_DEFAULT_BUILD
4083       Include INSTALL target to default build.
4084
4085       In  Visual  Studio  solution, by default the INSTALL target will not be
4086       part of the default  build.  Setting  this  variable  will  enable  the
4087       INSTALL target to be part of the default build.
4088
4089   CMAKE_VS_INCLUDE_PACKAGE_TO_DEFAULT_BUILD
4090       Include PACKAGE target to default build.
4091
4092       In  Visual  Studio  solution, by default the PACKAGE target will not be
4093       part of the default build. Setting this variable will enable the  PACK‐
4094       AGE target to be part of the default build.
4095
4096   CMAKE_VS_JUST_MY_CODE_DEBUGGING
4097       Enable Just My Code with Visual Studio debugger.
4098
4099       This variable is used to initialize the VS_JUST_MY_CODE_DEBUGGING prop‐
4100       erty on all targets when they are created.  See  that  target  property
4101       for additional information.
4102
4103   CMAKE_VS_SDK_EXCLUDE_DIRECTORIES
4104       This variable allows to override Visual Studio default Exclude Directo‐
4105       ries.
4106
4107   CMAKE_VS_SDK_EXECUTABLE_DIRECTORIES
4108       This variable allows  to  override  Visual  Studio  default  Executable
4109       Directories.
4110
4111   CMAKE_VS_SDK_INCLUDE_DIRECTORIES
4112       This variable allows to override Visual Studio default Include Directo‐
4113       ries.
4114
4115   CMAKE_VS_SDK_LIBRARY_DIRECTORIES
4116       This variable allows to override Visual Studio default Library Directo‐
4117       ries.
4118
4119   CMAKE_VS_SDK_LIBRARY_WINRT_DIRECTORIES
4120       This  variable  allows  to override Visual Studio default Library WinRT
4121       Directories.
4122
4123   CMAKE_VS_SDK_REFERENCE_DIRECTORIES
4124       This variable allows to override Visual Studio default Reference Direc‐
4125       tories.
4126
4127   CMAKE_VS_SDK_SOURCE_DIRECTORIES
4128       This  variable allows to override Visual Studio default Source Directo‐
4129       ries.
4130
4131   CMAKE_VS_WINRT_BY_DEFAULT
4132       Tell Visual Studio Generators for VS 2010 and  above  that  the  target
4133       platform compiles as WinRT by default (compiles with /ZW).
4134
4135       This  variable  is  meant  to be set by a toolchain file for such plat‐
4136       forms.
4137
4138   CMAKE_WIN32_EXECUTABLE
4139       Default value for WIN32_EXECUTABLE of targets.
4140
4141       This variable is used to initialize the  WIN32_EXECUTABLE  property  on
4142       all the targets.  See that target property for additional information.
4143
4144   CMAKE_WINDOWS_EXPORT_ALL_SYMBOLS
4145       Default  value  for  WINDOWS_EXPORT_ALL_SYMBOLS  target property.  This
4146       variable is used to initialize the property on each  target  as  it  is
4147       created.
4148
4149   CMAKE_XCODE_ATTRIBUTE_<an-attribute>
4150       Set Xcode target attributes directly.
4151
4152       Tell  the  Xcode  generator to set ‘<an-attribute>’ to a given value in
4153       the generated Xcode project.  Ignored on other generators.
4154
4155       See  the  XCODE_ATTRIBUTE_<an-attribute>   target   property   to   set
4156       attributes on a specific target.
4157
4158       Contents  of  CMAKE_XCODE_ATTRIBUTE_<an-attribute>  may  use “generator
4159       expressions” with the syntax $<...>.  See  the  cmake-generator-expres‐
4160       sions(7)  manual  for  available  expressions.  See the cmake-buildsys‐
4161       tem(7) manual for more on defining buildsystem properties.
4162
4163   EXECUTABLE_OUTPUT_PATH
4164       Old executable location variable.
4165
4166       The target property RUNTIME_OUTPUT_DIRECTORY supercedes  this  variable
4167       for  a target if it is set.  Executable targets are otherwise placed in
4168       this directory.
4169
4170   LIBRARY_OUTPUT_PATH
4171       Old library location variable.
4172
4173       The target properties  ARCHIVE_OUTPUT_DIRECTORY,  LIBRARY_OUTPUT_DIREC‐
4174       TORY, and RUNTIME_OUTPUT_DIRECTORY supersede this variable for a target
4175       if they are set.  Library targets are otherwise placed in  this  direc‐
4176       tory.
4177

VARIABLES FOR LANGUAGES

4179   CMAKE_COMPILER_IS_GNUCC
4180       True if the C compiler is GNU.  Use CMAKE_C_COMPILER_ID instead.
4181
4182   CMAKE_COMPILER_IS_GNUCXX
4183       True  if  the  C++  (CXX)  compiler  is GNU.  Use CMAKE_CXX_COMPILER_ID
4184       instead.
4185
4186   CMAKE_COMPILER_IS_GNUG77
4187       True if the Fortran compiler  is  GNU.   Use  CMAKE_Fortran_COMPILER_ID
4188       instead.
4189
4190   CMAKE_CUDA_HOST_COMPILER
4191       Executable to use when compiling host code when compiling CUDA language
4192       files. Maps to the nvcc -ccbin option.  Will only be used by  CMake  on
4193       the  first  configuration  to determine a valid host compiler for CUDA.
4194       After a valid host compiler has been found, this  value  is  read-only.
4195       This variable takes priority over the CUDAHOSTCXX environment variable.
4196
4197   CMAKE_CUDA_EXTENSIONS
4198       Default value for CUDA_EXTENSIONS property of targets.
4199
4200       This variable is used to initialize the CUDA_EXTENSIONS property on all
4201       targets.  See that target property for additional information.
4202
4203       See the cmake-compile-features(7) manual  for  information  on  compile
4204       features and a list of supported compilers.
4205
4206   CMAKE_CUDA_STANDARD
4207       Default value for CUDA_STANDARD property of targets.
4208
4209       This  variable  is used to initialize the CUDA_STANDARD property on all
4210       targets.  See that target property for additional information.
4211
4212       See the cmake-compile-features(7) manual  for  information  on  compile
4213       features and a list of supported compilers.
4214
4215   CMAKE_CUDA_STANDARD_REQUIRED
4216       Default value for CUDA_STANDARD_REQUIRED property of targets.
4217
4218       This variable is used to initialize the CUDA_STANDARD_REQUIRED property
4219       on all targets.  See that target property for additional information.
4220
4221       See the cmake-compile-features(7) manual  for  information  on  compile
4222       features and a list of supported compilers.
4223
4224   CMAKE_CUDA_TOOLKIT_INCLUDE_DIRECTORIES
4225       When the CUDA language has been enabled, this provides a semicolon-sep‐
4226       arated list of include directories provided by the CUDA  Toolkit.   The
4227       value may be useful for C++ source files to include CUDA headers.
4228
4229   CMAKE_CXX_COMPILE_FEATURES
4230       List of features known to the C++ compiler
4231
4232       These features are known to be available for use with the C++ compiler.
4233       This   list   is   a   subset   of   the   features   listed   in   the
4234       CMAKE_CXX_KNOWN_FEATURES global property.
4235
4236       See  the  cmake-compile-features(7)  manual  for information on compile
4237       features and a list of supported compilers.
4238
4239   CMAKE_CXX_EXTENSIONS
4240       Default value for CXX_EXTENSIONS property of targets.
4241
4242       This variable is used to initialize the CXX_EXTENSIONS property on  all
4243       targets.  See that target property for additional information.
4244
4245       See  the  cmake-compile-features(7)  manual  for information on compile
4246       features and a list of supported compilers.
4247
4248   CMAKE_CXX_STANDARD
4249       Default value for CXX_STANDARD property of targets.
4250
4251       This variable is used to initialize the CXX_STANDARD  property  on  all
4252       targets.  See that target property for additional information.
4253
4254       See  the  cmake-compile-features(7)  manual  for information on compile
4255       features and a list of supported compilers.
4256
4257   CMAKE_CXX_STANDARD_REQUIRED
4258       Default value for CXX_STANDARD_REQUIRED property of targets.
4259
4260       This variable is used to initialize the CXX_STANDARD_REQUIRED  property
4261       on all targets.  See that target property for additional information.
4262
4263       See  the  cmake-compile-features(7)  manual  for information on compile
4264       features and a list of supported compilers.
4265
4266   CMAKE_C_COMPILE_FEATURES
4267       List of features known to the C compiler
4268
4269       These features are known to be available for use with the  C  compiler.
4270       This  list is a subset of the features listed in the CMAKE_C_KNOWN_FEA‐
4271       TURES global property.
4272
4273       See the cmake-compile-features(7) manual  for  information  on  compile
4274       features and a list of supported compilers.
4275
4276   CMAKE_C_EXTENSIONS
4277       Default value for C_EXTENSIONS property of targets.
4278
4279       This  variable  is  used to initialize the C_EXTENSIONS property on all
4280       targets.  See that target property for additional information.
4281
4282       See the cmake-compile-features(7) manual  for  information  on  compile
4283       features and a list of supported compilers.
4284
4285   CMAKE_C_STANDARD
4286       Default value for C_STANDARD property of targets.
4287
4288       This variable is used to initialize the C_STANDARD property on all tar‐
4289       gets.  See that target property for additional information.
4290
4291       See the cmake-compile-features(7) manual  for  information  on  compile
4292       features and a list of supported compilers.
4293
4294   CMAKE_C_STANDARD_REQUIRED
4295       Default value for C_STANDARD_REQUIRED property of targets.
4296
4297       This variable is used to initialize the C_STANDARD_REQUIRED property on
4298       all targets.  See that target property for additional information.
4299
4300       See the cmake-compile-features(7) manual  for  information  on  compile
4301       features and a list of supported compilers.
4302
4303   CMAKE_Fortran_MODDIR_DEFAULT
4304       Fortran default module output directory.
4305
4306       Most  Fortran  compilers write .mod files to the current working direc‐
4307       tory.  For those that do not, this is set to . and used when  the  For‐
4308       tran_MODULE_DIRECTORY target property is not set.
4309
4310   CMAKE_Fortran_MODDIR_FLAG
4311       Fortran flag for module output directory.
4312
4313       This  stores  the  flag  needed  to  pass the value of the Fortran_MOD‐
4314       ULE_DIRECTORY target property to the compiler.
4315
4316   CMAKE_Fortran_MODOUT_FLAG
4317       Fortran flag to enable module output.
4318
4319       Most Fortran compilers write .mod files out by  default.   For  others,
4320       this stores the flag needed to enable module output.
4321
4322   CMAKE_<LANG>_ANDROID_TOOLCHAIN_MACHINE
4323       When  Cross  Compiling for Android this variable contains the toolchain
4324       binutils machine name (e.g. gcc -dumpmachine).  The binutils  typically
4325       have a <machine>- prefix on their name.
4326
4327       See        also        CMAKE_<LANG>_ANDROID_TOOLCHAIN_PREFIX        and
4328       CMAKE_<LANG>_ANDROID_TOOLCHAIN_SUFFIX.
4329
4330   CMAKE_<LANG>_ANDROID_TOOLCHAIN_PREFIX
4331       When Cross Compiling for Android this variable  contains  the  absolute
4332       path prefixing the toolchain GNU compiler and its binutils.
4333
4334       See        also        CMAKE_<LANG>_ANDROID_TOOLCHAIN_SUFFIX        and
4335       CMAKE_<LANG>_ANDROID_TOOLCHAIN_MACHINE.
4336
4337       For example, the path to the linker is:
4338
4339          ${CMAKE_CXX_ANDROID_TOOLCHAIN_PREFIX}ld${CMAKE_CXX_ANDROID_TOOLCHAIN_SUFFIX}
4340
4341   CMAKE_<LANG>_ANDROID_TOOLCHAIN_SUFFIX
4342       When Cross Compiling for Android this variable contains the host  plat‐
4343       form suffix of the toolchain GNU compiler and its binutils.
4344
4345       See        also        CMAKE_<LANG>_ANDROID_TOOLCHAIN_PREFIX        and
4346       CMAKE_<LANG>_ANDROID_TOOLCHAIN_MACHINE.
4347
4348   CMAKE_<LANG>_ARCHIVE_APPEND
4349       Rule variable to append to a static archive.
4350
4351       This is a rule variable that tells CMake how to append to a static  ar‐
4352       chive.   It  is  used in place of CMAKE_<LANG>_CREATE_STATIC_LIBRARY on
4353       some platforms in order to  support  large  object  counts.   See  also
4354       CMAKE_<LANG>_ARCHIVE_CREATE and CMAKE_<LANG>_ARCHIVE_FINISH.
4355
4356   CMAKE_<LANG>_ARCHIVE_CREATE
4357       Rule variable to create a new static archive.
4358
4359       This  is  a  rule  variable that tells CMake how to create a static ar‐
4360       chive.  It is used in place  of  CMAKE_<LANG>_CREATE_STATIC_LIBRARY  on
4361       some  platforms  in  order  to  support  large object counts.  See also
4362       CMAKE_<LANG>_ARCHIVE_APPEND and CMAKE_<LANG>_ARCHIVE_FINISH.
4363
4364   CMAKE_<LANG>_ARCHIVE_FINISH
4365       Rule variable to finish an existing static archive.
4366
4367       This is a rule variable that tells CMake how to  finish  a  static  ar‐
4368       chive.   It  is  used in place of CMAKE_<LANG>_CREATE_STATIC_LIBRARY on
4369       some platforms in order to  support  large  object  counts.   See  also
4370       CMAKE_<LANG>_ARCHIVE_CREATE and CMAKE_<LANG>_ARCHIVE_APPEND.
4371
4372   CMAKE_<LANG>_COMPILER
4373       The full path to the compiler for LANG.
4374
4375       This  is  the  command  that will be used as the <LANG> compiler.  Once
4376       set, you can not change this variable.
4377
4378   CMAKE_<LANG>_COMPILER_EXTERNAL_TOOLCHAIN
4379       The external toolchain for cross-compiling, if supported.
4380
4381       Some compiler toolchains do not ship their own auxiliary utilities such
4382       as  archivers  and  linkers.   The  compiler  driver may support a com‐
4383       mand-line  argument  to   specify   the   location   of   such   tools.
4384       CMAKE_<LANG>_COMPILER_EXTERNAL_TOOLCHAIN  may  be  set to a path to the
4385       external toolchain and will be passed to the compiler  driver  if  sup‐
4386       ported.
4387
4388       This  variable  may  only  be  set in a toolchain file specified by the
4389       CMAKE_TOOLCHAIN_FILE variable.
4390
4391   CMAKE_<LANG>_COMPILER_ID
4392       Compiler identification string.
4393
4394       A short string unique to the compiler vendor.  Possible values include:
4395
4396          Absoft = Absoft Fortran (absoft.com)
4397          ADSP = Analog VisualDSP++ (analog.com)
4398          AppleClang = Apple Clang (apple.com)
4399          ARMCC = ARM Compiler (arm.com)
4400          ARMClang = ARM Compiler based on Clang (arm.com)
4401          Bruce = Bruce C Compiler
4402          CCur = Concurrent Fortran (ccur.com)
4403          Clang = LLVM Clang (clang.llvm.org)
4404          Cray = Cray Compiler (cray.com)
4405          Embarcadero, Borland = Embarcadero (embarcadero.com)
4406          Flang = Flang LLVM Fortran Compiler
4407          G95 = G95 Fortran (g95.org)
4408          GNU = GNU Compiler Collection (gcc.gnu.org)
4409          GHS = Green Hills Software (www.ghs.com)
4410          HP = Hewlett-Packard Compiler (hp.com)
4411          IAR = IAR Systems (iar.com)
4412          Intel = Intel Compiler (intel.com)
4413          MSVC = Microsoft Visual Studio (microsoft.com)
4414          NVIDIA = NVIDIA CUDA Compiler (nvidia.com)
4415          OpenWatcom = Open Watcom (openwatcom.org)
4416          PGI = The Portland Group (pgroup.com)
4417          PathScale = PathScale (pathscale.com)
4418          SDCC = Small Device C Compiler (sdcc.sourceforge.net)
4419          SunPro = Oracle Solaris Studio (oracle.com)
4420          TI = Texas Instruments (ti.com)
4421          TinyCC = Tiny C Compiler (tinycc.org)
4422          XL, VisualAge, zOS = IBM XL (ibm.com)
4423          XLClang = IBM Clang-based XL (ibm.com)
4424
4425       This variable is not guaranteed to be defined for all compilers or lan‐
4426       guages.
4427
4428   CMAKE_<LANG>_COMPILER_LOADED
4429       Defined to true if the language is enabled.
4430
4431       When  language <LANG> is enabled by project() or enable_language() this
4432       variable is defined to 1.
4433
4434   CMAKE_<LANG>_COMPILER_PREDEFINES_COMMAND
4435       Command that outputs the compiler pre definitions.
4436
4437       See AUTOMOC which uses CMAKE_CXX_COMPILER_PREDEFINES_COMMAND to  gener‐
4438       ate the AUTOMOC_COMPILER_PREDEFINES.
4439
4440   CMAKE_<LANG>_COMPILER_TARGET
4441       The target for cross-compiling, if supported.
4442
4443       Some compiler drivers are inherently cross-compilers, such as clang and
4444       QNX qcc. These compiler drivers  support  a  command-line  argument  to
4445       specify the target to cross-compile for.
4446
4447       This  variable  may  only  be  set in a toolchain file specified by the
4448       CMAKE_TOOLCHAIN_FILE variable.
4449
4450   CMAKE_<LANG>_COMPILER_VERSION
4451       Compiler version string.
4452
4453       Compiler version in major[.minor[.patch[.tweak]]] format.   This  vari‐
4454       able is not guaranteed to be defined for all compilers or languages.
4455
4456       For  example  CMAKE_C_COMPILER_VERSION  and  CMAKE_CXX_COMPILER_VERSION
4457       might indicate the respective C and C++ compiler version.
4458
4459   CMAKE_<LANG>_COMPILE_OBJECT
4460       Rule variable to compile a single object file.
4461
4462       This is a rule variable that tells CMake how to compile a single object
4463       file for the language <LANG>.
4464
4465   CMAKE_<LANG>_CREATE_SHARED_LIBRARY
4466       Rule variable to create a shared library.
4467
4468       This is a rule variable that tells CMake how to create a shared library
4469       for the language <LANG>.  This rule variable is a ; delimited  list  of
4470       commands to run to perform the linking step.
4471
4472   CMAKE_<LANG>_CREATE_SHARED_MODULE
4473       Rule variable to create a shared module.
4474
4475       This is a rule variable that tells CMake how to create a shared library
4476       for the language <LANG>.  This rule variable is a ; delimited  list  of
4477       commands to run.
4478
4479   CMAKE_<LANG>_CREATE_STATIC_LIBRARY
4480       Rule variable to create a static library.
4481
4482       This is a rule variable that tells CMake how to create a static library
4483       for the language <LANG>.
4484
4485   CMAKE_<LANG>_FLAGS
4486       Flags for all build types.
4487
4488       <LANG> flags used regardless of the value of CMAKE_BUILD_TYPE.
4489
4490       This is initialized for each language from environment variables:
4491
4492       · CMAKE_C_FLAGS: Initialized by the CFLAGS environment variable.
4493
4494       · CMAKE_CXX_FLAGS: Initialized by the CXXFLAGS environment variable.
4495
4496       · CMAKE_CUDA_FLAGS: Initialized by the CUDAFLAGS environment variable.
4497
4498       · CMAKE_Fortran_FLAGS: Initialized by the FFLAGS environment variable.
4499
4500   CMAKE_<LANG>_FLAGS_<CONFIG>
4501       Flags for language <LANG> when building for the <CONFIG> configuration.
4502
4503   CMAKE_<LANG>_FLAGS_<CONFIG>_INIT
4504       Value used to initialize the  CMAKE_<LANG>_FLAGS_<CONFIG>  cache  entry
4505       the  first  time  a build tree is configured for language <LANG>.  This
4506       variable is meant to be set by a toolchain file.  CMake may prepend  or
4507       append  content  to the value based on the environment and target plat‐
4508       form.
4509
4510       See also CMAKE_<LANG>_FLAGS_INIT.
4511
4512   CMAKE_<LANG>_FLAGS_DEBUG
4513       This variable is the Debug variant of  the  CMAKE_<LANG>_FLAGS_<CONFIG>
4514       variable.
4515
4516   CMAKE_<LANG>_FLAGS_DEBUG_INIT
4517       This  variable  is  the  Debug  variant of the CMAKE_<LANG>_FLAGS_<CON‐
4518       FIG>_INIT variable.
4519
4520   CMAKE_<LANG>_FLAGS_INIT
4521       Value used to initialize the CMAKE_<LANG>_FLAGS cache entry  the  first
4522       time  a build tree is configured for language <LANG>.  This variable is
4523       meant to be set by a toolchain file.  CMake may prepend or append  con‐
4524       tent to the value based on the environment and target platform.
4525
4526       See  also  the  configuration-specific CMAKE_<LANG>_FLAGS_<CONFIG>_INIT
4527       variable.
4528
4529   CMAKE_<LANG>_FLAGS_MINSIZEREL
4530       This variable is the MinSizeRel variant of the CMAKE_<LANG>_FLAGS_<CON‐
4531       FIG> variable.
4532
4533   CMAKE_<LANG>_FLAGS_MINSIZEREL_INIT
4534       This variable is the MinSizeRel variant of the CMAKE_<LANG>_FLAGS_<CON‐
4535       FIG>_INIT variable.
4536
4537   CMAKE_<LANG>_FLAGS_RELEASE
4538       This variable is the Release variant of the CMAKE_<LANG>_FLAGS_<CONFIG>
4539       variable.
4540
4541   CMAKE_<LANG>_FLAGS_RELEASE_INIT
4542       This  variable  is  the Release variant of the CMAKE_<LANG>_FLAGS_<CON‐
4543       FIG>_INIT variable.
4544
4545   CMAKE_<LANG>_FLAGS_RELWITHDEBINFO
4546       This    variable    is    the    RelWithDebInfo    variant    of    the
4547       CMAKE_<LANG>_FLAGS_<CONFIG> variable.
4548
4549   CMAKE_<LANG>_FLAGS_RELWITHDEBINFO_INIT
4550       This    variable    is    the    RelWithDebInfo    variant    of    the
4551       CMAKE_<LANG>_FLAGS_<CONFIG>_INIT variable.
4552
4553   CMAKE_<LANG>_IGNORE_EXTENSIONS
4554       File extensions that should be ignored by the build.
4555
4556       This is a list of file extensions that may be part of a project  for  a
4557       given language but are not compiled.
4558
4559   CMAKE_<LANG>_IMPLICIT_INCLUDE_DIRECTORIES
4560       Directories implicitly searched by the compiler for header files.
4561
4562       CMake does not explicitly specify these directories on compiler command
4563       lines for language <LANG>.  This prevents  system  include  directories
4564       from being treated as user include directories on some compilers, which
4565       is important for C, CXX, and CUDA to avoid overriding standard  library
4566       headers.
4567
4568       This  value  is not used for Fortran because it has no standard library
4569       headers and some compilers do not search their implicit include  direc‐
4570       tories for module .mod files.
4571
4572   CMAKE_<LANG>_IMPLICIT_LINK_DIRECTORIES
4573       Implicit linker search path detected for language <LANG>.
4574
4575       Compilers   typically  pass  directories  containing  language  runtime
4576       libraries and default library search paths when they invoke  a  linker.
4577       These  paths  are implicit linker search directories for the compiler’s
4578       language.  CMake automatically detects these directories for each  lan‐
4579       guage and reports the results in this variable.
4580
4581       Some  toolchains read implicit directories from an environment variable
4582       such as LIBRARY_PATH.  If using such an environment variable, keep  its
4583       value  consistent  when  operating  in a given build tree because CMake
4584       saves the value detected when first creating a build tree.
4585
4586       If policy CMP0060 is not set to NEW, then when  a  library  in  one  of
4587       these  directories  is  given  by  full path to target_link_libraries()
4588       CMake will generate the -l<name> form on link lines for historical pur‐
4589       poses.
4590
4591   CMAKE_<LANG>_IMPLICIT_LINK_FRAMEWORK_DIRECTORIES
4592       Implicit linker framework search path detected for language <LANG>.
4593
4594       These  paths  are  implicit linker framework search directories for the
4595       compiler’s language.  CMake automatically detects these directories for
4596       each language and reports the results in this variable.
4597
4598   CMAKE_<LANG>_IMPLICIT_LINK_LIBRARIES
4599       Implicit link libraries and flags detected for language <LANG>.
4600
4601       Compilers typically pass language runtime library names and other flags
4602       when they invoke a linker.  These flags are implicit link  options  for
4603       the  compiler’s  language.  CMake automatically detects these libraries
4604       and flags for each language and reports the results in this variable.
4605
4606   CMAKE_<LANG>_LIBRARY_ARCHITECTURE
4607       Target architecture library directory name detected for <LANG>.
4608
4609       If the <LANG> compiler passes to the  linker  an  architecture-specific
4610       system  library search directory such as <prefix>/lib/<arch> this vari‐
4611       able contains the <arch> name if/as detected by CMake.
4612
4613   CMAKE_<LANG>_LINKER_PREFERENCE
4614       Preference value for linker language selection.
4615
4616       The “linker language” for executable, shared library, and  module  tar‐
4617       gets  is  the  language  whose  compiler  will  invoke the linker.  The
4618       LINKER_LANGUAGE target property sets the language  explicitly.   Other‐
4619       wise,  the  linker  language  is  that whose linker preference value is
4620       highest among languages compiled and linked into the target.  See  also
4621       the CMAKE_<LANG>_LINKER_PREFERENCE_PROPAGATES variable.
4622
4623   CMAKE_<LANG>_LINKER_PREFERENCE_PROPAGATES
4624       True if CMAKE_<LANG>_LINKER_PREFERENCE propagates across targets.
4625
4626       This  is  used when CMake selects a linker language for a target.  Lan‐
4627       guages compiled directly into the target are always considered.  A lan‐
4628       guage compiled into static libraries linked by the target is considered
4629       if this variable is true.
4630
4631   CMAKE_<LANG>_LINKER_WRAPPER_FLAG
4632       Defines the syntax of compiler driver option to  pass  options  to  the
4633       linker  tool.  It  will  be used to translate the LINKER: prefix in the
4634       link options (see add_link_options() and target_link_options()).
4635
4636       This variable holds a semicolon-separated list of tokens.  If  a  space
4637       (i.e.  ” “) is specified as last token, flag and LINKER: arguments will
4638       be specified  as  separate  arguments  to  the  compiler  driver.   The
4639       CMAKE_<LANG>_LINKER_WRAPPER_FLAG_SEP  variable can be specified to man‐
4640       age concatenation of arguments.
4641
4642       For example, for Clang we have:
4643
4644          set (CMAKE_C_LINKER_WRAPPER_FLAG "-Xlinker" " ")
4645
4646       Specifying "LINKER:-z,defs" will be transformed in -Xlinker -z -Xlinker
4647       defs.
4648
4649       For GNU GCC:
4650
4651          set (CMAKE_C_LINKER_WRAPPER_FLAG "-Wl,")
4652          set (CMAKE_C_LINKER_WRAPPER_FLAG_SEP ",")
4653
4654       Specifying "LINKER:-z,defs" will be transformed in -Wl,-z,defs.
4655
4656       And for SunPro:
4657
4658          set (CMAKE_C_LINKER_WRAPPER_FLAG "-Qoption" "ld" " ")
4659          set (CMAKE_C_LINKER_WRAPPER_FLAG_SEP ",")
4660
4661       Specifying "LINKER:-z,defs" will be transformed in -Qoption ld -z,defs.
4662
4663   CMAKE_<LANG>_LINKER_WRAPPER_FLAG_SEP
4664       This variable is used with CMAKE_<LANG>_LINKER_WRAPPER_FLAG variable to
4665       format LINKER: prefix in the link options (see  add_link_options()  and
4666       target_link_options()).
4667
4668       When  specified,  arguments  of the LINKER: prefix will be concatenated
4669       using this value as separator.
4670
4671   CMAKE_<LANG>_LINK_EXECUTABLE
4672       Rule variable to link an executable.
4673
4674       Rule variable to link an executable for the given language.
4675
4676   CMAKE_<LANG>_OUTPUT_EXTENSION
4677       Extension for the output of a compile for a single file.
4678
4679       This is the extension for an object file for  the  given  <LANG>.   For
4680       example .obj for C on Windows.
4681
4682   CMAKE_<LANG>_SIMULATE_ID
4683       Identification string of “simulated” compiler.
4684
4685       Some  compilers  simulate  other compilers to serve as drop-in replace‐
4686       ments.  When CMake detects such a compiler it  sets  this  variable  to
4687       what  would  have  been  the CMAKE_<LANG>_COMPILER_ID for the simulated
4688       compiler.
4689
4690   CMAKE_<LANG>_SIMULATE_VERSION
4691       Version string of “simulated” compiler.
4692
4693       Some compilers simulate other compilers to serve  as  drop-in  replace‐
4694       ments.   When  CMake  detects  such a compiler it sets this variable to
4695       what would have been the CMAKE_<LANG>_COMPILER_VERSION  for  the  simu‐
4696       lated compiler.
4697
4698   CMAKE_<LANG>_SIZEOF_DATA_PTR
4699       Size of pointer-to-data types for language <LANG>.
4700
4701       This  holds  the size (in bytes) of pointer-to-data types in the target
4702       platform ABI.  It is defined for languages C and CXX (C++).
4703
4704   CMAKE_<LANG>_SOURCE_FILE_EXTENSIONS
4705       Extensions of source files for the given language.
4706
4707       This is the list of extensions for a given language’s source files.
4708
4709   CMAKE_<LANG>_STANDARD_INCLUDE_DIRECTORIES
4710       Include directories to be used for every source file compiled with  the
4711       <LANG>  compiler.   This  is  meant for specification of system include
4712       directories needed by the  language  for  the  current  platform.   The
4713       directories  always appear at the end of the include path passed to the
4714       compiler.
4715
4716       This variable should not be set by project code.  It is meant to be set
4717       by  CMake’s  platform information modules for the current toolchain, or
4718       by a toolchain file when used with CMAKE_TOOLCHAIN_FILE.
4719
4720       See also CMAKE_<LANG>_STANDARD_LIBRARIES.
4721
4722   CMAKE_<LANG>_STANDARD_LIBRARIES
4723       Libraries linked into every executable and shared  library  linked  for
4724       language  <LANG>.   This is meant for specification of system libraries
4725       needed by the language for the current platform.
4726
4727       This variable should not be set by project code.  It is meant to be set
4728       by  CMake’s  platform information modules for the current toolchain, or
4729       by a toolchain file when used with CMAKE_TOOLCHAIN_FILE.
4730
4731       See also CMAKE_<LANG>_STANDARD_INCLUDE_DIRECTORIES.
4732
4733   CMAKE_OBJC_EXTENSIONS
4734       Default value for OBJC_EXTENSIONS property of targets.
4735
4736       This variable is used to initialize the OBJC_EXTENSIONS property on all
4737       targets.  See that target property for additional information.
4738
4739       See  the  cmake-compile-features(7)  manual  for information on compile
4740       features and a list of supported compilers.
4741
4742   CMAKE_OBJC_STANDARD
4743       Default value for OBJC_STANDARD property of targets.
4744
4745       This variable is used to initialize the OBJC_STANDARD property  on  all
4746       targets.  See that target property for additional information.
4747
4748       See  the  cmake-compile-features(7)  manual  for information on compile
4749       features and a list of supported compilers.
4750
4751   CMAKE_OBJC_STANDARD_REQUIRED
4752       Default value for OBJC_STANDARD_REQUIRED property of targets.
4753
4754       This variable is used to initialize the OBJC_STANDARD_REQUIRED property
4755       on all targets.  See that target property for additional information.
4756
4757       See  the  cmake-compile-features(7)  manual  for information on compile
4758       features and a list of supported compilers.
4759
4760   CMAKE_OBJCXX_EXTENSIONS
4761       Default value for OBJCXX_EXTENSIONS property of targets.
4762
4763       This variable is used to initialize the OBJCXX_EXTENSIONS  property  on
4764       all targets.  See that target property for additional information.
4765
4766       See  the  cmake-compile-features(7)  manual  for information on compile
4767       features and a list of supported compilers.
4768
4769   CMAKE_OBJCXX_STANDARD
4770       Default value for OBJCXX_STANDARD property of targets.
4771
4772       This variable is used to initialize the OBJCXX_STANDARD property on all
4773       targets.  See that target property for additional information.
4774
4775       See  the  cmake-compile-features(7)  manual  for information on compile
4776       features and a list of supported compilers.
4777
4778   CMAKE_OBJCXX_STANDARD_REQUIRED
4779       Default value for OBJCXX_STANDARD_REQUIRED property of targets.
4780
4781       This variable is used to initialize the OBJCXX_STANDARD_REQUIRED  prop‐
4782       erty  on all targets.  See that target property for additional informa‐
4783       tion.
4784
4785       See the cmake-compile-features(7) manual  for  information  on  compile
4786       features and a list of supported compilers.
4787
4788   CMAKE_Swift_LANGUAGE_VERSION
4789       Set  to  the  Swift  language  version  number.  If not set, the oldest
4790       legacy version known to be available  in  the  host  Xcode  version  is
4791       assumed:
4792
4793       · Swift 4.0 for Xcode 10.2 and above.
4794
4795       · Swift 3.0 for Xcode 8.3 and above.
4796
4797       · Swift 2.3 for Xcode 8.2 and below.
4798
4799   CMAKE_USER_MAKE_RULES_OVERRIDE_<LANG>
4800       Specify a CMake file that overrides platform information for <LANG>.
4801
4802       This  is  a language-specific version of CMAKE_USER_MAKE_RULES_OVERRIDE
4803       loaded only when enabling language <LANG>.
4804

VARIABLES FOR CTEST

4806   CTEST_BINARY_DIRECTORY
4807       Specify the CTest BuildDirectory setting in a ctest(1) dashboard client
4808       script.
4809
4810   CTEST_BUILD_COMMAND
4811       Specify  the  CTest  MakeCommand setting in a ctest(1) dashboard client
4812       script.
4813
4814   CTEST_BUILD_NAME
4815       Specify the CTest BuildName setting  in  a  ctest(1)  dashboard  client
4816       script.
4817
4818   CTEST_BZR_COMMAND
4819       Specify  the  CTest  BZRCommand  setting in a ctest(1) dashboard client
4820       script.
4821
4822   CTEST_BZR_UPDATE_OPTIONS
4823       Specify the CTest BZRUpdateOptions  setting  in  a  ctest(1)  dashboard
4824       client script.
4825
4826   CTEST_CHANGE_ID
4827       Specify  the  CTest  ChangeId  setting  in  a ctest(1) dashboard client
4828       script.
4829
4830       This setting allows CTest to  pass  arbitrary  information  about  this
4831       build  up  to CDash.  One use of this feature is to allow CDash to post
4832       comments on your pull request if anything goes wrong with your build.
4833
4834   CTEST_CHECKOUT_COMMAND
4835       Tell the ctest_start() command how to checkout or initialize the source
4836       directory in a ctest(1) dashboard client script.
4837
4838   CTEST_CONFIGURATION_TYPE
4839       Specify  the  CTest DefaultCTestConfigurationType setting in a ctest(1)
4840       dashboard client script.
4841
4842   CTEST_CONFIGURE_COMMAND
4843       Specify the CTest ConfigureCommand  setting  in  a  ctest(1)  dashboard
4844       client script.
4845
4846   CTEST_COVERAGE_COMMAND
4847       Specify  the  CTest  CoverageCommand  setting  in  a ctest(1) dashboard
4848       client script.
4849
4850   Cobertura
4851       Using Cobertura as the coverage  generation  within  your  multi-module
4852       Java project can generate a series of XML files.
4853
4854       The  Cobertura Coverage parser expects to read the coverage data from a
4855       single XML file which contains  the  coverage  data  for  all  modules.
4856       Cobertura  has  a program with the ability to merge given cobertura.ser
4857       files and then another program to generate a combined XML file from the
4858       previous  merged  file.   For command line testing, this can be done by
4859       hand prior to CTest looking for the coverage files. For script  builds,
4860       set  the  CTEST_COVERAGE_COMMAND variable to point to a file which will
4861       perform these same steps, such as a .sh or .bat file.
4862
4863          set(CTEST_COVERAGE_COMMAND .../run-coverage-and-consolidate.sh)
4864
4865       where the run-coverage-and-consolidate.sh script is perhaps created  by
4866       the configure_file() command and might contain the following code:
4867
4868          #!/usr/bin/env bash
4869          CoberturaFiles="$(find "/path/to/source" -name "cobertura.ser")"
4870          SourceDirs="$(find "/path/to/source" -name "java" -type d)"
4871          cobertura-merge --datafile coberturamerge.ser $CoberturaFiles
4872          cobertura-report --datafile coberturamerge.ser --destination . \
4873                           --format xml $SourceDirs
4874
4875       The  script  uses find to capture the paths to all of the cobertura.ser
4876       files found below the project’s source directory.  It keeps the list of
4877       files  and  supplies  it as an argument to the cobertura-merge program.
4878       The --datafile argument signifies where the result of the merge will be
4879       kept.
4880
4881       The  combined  coberturamerge.ser file is then used to generate the XML
4882       report using the cobertura-report program.   The  call  to  the  cober‐
4883       tura-report program requires some named arguments.
4884
4885       --datafila
4886              path to the merged .ser file
4887
4888       --destination
4889              path to put the output files(s)
4890
4891       --format
4892              file format to write output in: xml or html
4893
4894       The  rest  of  the  supplied arguments consist of the full paths to the
4895       /src/main/java directories of each module within the source tree. These
4896       directories are needed and should not be forgotten.
4897
4898   CTEST_COVERAGE_EXTRA_FLAGS
4899       Specify  the  CTest  CoverageExtraFlags setting in a ctest(1) dashboard
4900       client script.
4901
4902   CTEST_CURL_OPTIONS
4903       Specify the CTest CurlOptions setting in a  ctest(1)  dashboard  client
4904       script.
4905
4906   CTEST_CUSTOM_COVERAGE_EXCLUDE
4907       A  list  of  regular expressions which will be used to exclude files by
4908       their path from coverage output by the ctest_coverage() command.
4909
4910       It is initialized by ctest(1), but may be edited in a CTestCustom file.
4911       See ctest_read_custom_files() documentation.
4912
4913   CTEST_CUSTOM_ERROR_EXCEPTION
4914       A  list  of  regular  expressions  which  will  be used to exclude when
4915       detecting error messages in build outputs by the ctest_test() command.
4916
4917       It is initialized by ctest(1), but may be edited in a CTestCustom file.
4918       See ctest_read_custom_files() documentation.
4919
4920   CTEST_CUSTOM_ERROR_MATCH
4921       A  list  of regular expressions which will be used to detect error mes‐
4922       sages in build outputs by the ctest_test() command.
4923
4924       It is initialized by ctest(1), but may be edited in a CTestCustom file.
4925       See ctest_read_custom_files() documentation.
4926
4927   CTEST_CUSTOM_ERROR_POST_CONTEXT
4928       The number of lines to include as context which follow an error message
4929       by the ctest_test() command. The default is 10.
4930
4931       It is initialized by ctest(1), but may be edited in a CTestCustom file.
4932       See ctest_read_custom_files() documentation.
4933
4934   CTEST_CUSTOM_ERROR_PRE_CONTEXT
4935       The  number  of lines to include as context which precede an error mes‐
4936       sage by the ctest_test() command. The default is 10.
4937
4938       It is initialized by ctest(1), but may be edited in a CTestCustom file.
4939       See ctest_read_custom_files() documentation.
4940
4941   CTEST_CUSTOM_MAXIMUM_FAILED_TEST_OUTPUT_SIZE
4942       When  saving  a  failing  test’s  output,  this is the maximum size, in
4943       bytes, that will be collected by the ctest_test() command. Defaults  to
4944       307200 (300 KiB).
4945
4946       It is initialized by ctest(1), but may be edited in a CTestCustom file.
4947       See ctest_read_custom_files() documentation.
4948
4949   CTEST_CUSTOM_MAXIMUM_NUMBER_OF_ERRORS
4950       The maximum number of errors in a  single  build  step  which  will  be
4951       detected.   After this, the ctest_test() command will truncate the out‐
4952       put.  Defaults to 50.
4953
4954       It is initialized by ctest(1), but may be edited in a CTestCustom file.
4955       See ctest_read_custom_files() documentation.
4956
4957   CTEST_CUSTOM_MAXIMUM_NUMBER_OF_WARNINGS
4958       The  maximum  number  of  warnings in a single build step which will be
4959       detected.  After this, the ctest_test() command will truncate the  out‐
4960       put.  Defaults to 50.
4961
4962       It is initialized by ctest(1), but may be edited in a CTestCustom file.
4963       See ctest_read_custom_files() documentation.
4964
4965   CTEST_CUSTOM_MAXIMUM_PASSED_TEST_OUTPUT_SIZE
4966       When saving a passing test’s output,  this  is  the  maximum  size,  in
4967       bytes,  that will be collected by the ctest_test() command. Defaults to
4968       1024 (1 KiB).
4969
4970       It is initialized by ctest(1), but may be edited in a CTestCustom file.
4971       See ctest_read_custom_files() documentation.
4972
4973   CTEST_CUSTOM_MEMCHECK_IGNORE
4974       A  list  of  regular  expressions  to  use  to exclude tests during the
4975       ctest_memcheck() command.
4976
4977       It is initialized by ctest(1), but may be edited in a CTestCustom file.
4978       See ctest_read_custom_files() documentation.
4979
4980   CTEST_CUSTOM_POST_MEMCHECK
4981       A list of commands to run at the end of the ctest_memcheck() command.
4982
4983       It is initialized by ctest(1), but may be edited in a CTestCustom file.
4984       See ctest_read_custom_files() documentation.
4985
4986   CTEST_CUSTOM_POST_TEST
4987       A list of commands to run at the end of the ctest_test() command.
4988
4989       It is initialized by ctest(1), but may be edited in a CTestCustom file.
4990       See ctest_read_custom_files() documentation.
4991
4992   CTEST_CUSTOM_PRE_MEMCHECK
4993       A list of commands to run at the start of the ctest_memcheck() command.
4994
4995       It is initialized by ctest(1), but may be edited in a CTestCustom file.
4996       See ctest_read_custom_files() documentation.
4997
4998   CTEST_CUSTOM_PRE_TEST
4999       A list of commands to run at the start of the ctest_test() command.
5000
5001       It is initialized by ctest(1), but may be edited in a CTestCustom file.
5002       See ctest_read_custom_files() documentation.
5003
5004   CTEST_CUSTOM_TESTS_IGNORE
5005       A  list  of  regular  expressions  to  use  to exclude tests during the
5006       ctest_test() command.
5007
5008       It is initialized by ctest(1), but may be edited in a CTestCustom file.
5009       See ctest_read_custom_files() documentation.
5010
5011   CTEST_CUSTOM_WARNING_EXCEPTION
5012       A  list  of  regular  expressions  which  will  be used to exclude when
5013       detecting warning messages in build outputs by the  ctest_build()  com‐
5014       mand.
5015
5016       It is initialized by ctest(1), but may be edited in a CTestCustom file.
5017       See ctest_read_custom_files() documentation.
5018
5019   CTEST_CUSTOM_WARNING_MATCH
5020       A list of regular expressions which will be used to detect warning mes‐
5021       sages in build outputs by the ctest_build() command.
5022
5023       It is initialized by ctest(1), but may be edited in a CTestCustom file.
5024       See ctest_read_custom_files() documentation.
5025
5026   CTEST_CVS_CHECKOUT
5027       Deprecated.  Use CTEST_CHECKOUT_COMMAND instead.
5028
5029   CTEST_CVS_COMMAND
5030       Specify the CTest CVSCommand setting in  a  ctest(1)  dashboard  client
5031       script.
5032
5033   CTEST_CVS_UPDATE_OPTIONS
5034       Specify  the  CTest  CVSUpdateOptions  setting  in a ctest(1) dashboard
5035       client script.
5036
5037   CTEST_DROP_LOCATION
5038       Specify the CTest DropLocation setting in a ctest(1)  dashboard  client
5039       script.
5040
5041   CTEST_DROP_METHOD
5042       Specify  the  CTest  DropMethod  setting in a ctest(1) dashboard client
5043       script.
5044
5045   CTEST_DROP_SITE
5046       Specify the CTest DropSite  setting  in  a  ctest(1)  dashboard  client
5047       script.
5048
5049   CTEST_DROP_SITE_CDASH
5050       Specify  the  CTest  IsCDash  setting  in  a  ctest(1) dashboard client
5051       script.
5052
5053   CTEST_DROP_SITE_PASSWORD
5054       Specify the CTest DropSitePassword  setting  in  a  ctest(1)  dashboard
5055       client script.
5056
5057   CTEST_DROP_SITE_USER
5058       Specify  the  CTest DropSiteUser setting in a ctest(1) dashboard client
5059       script.
5060
5061   CTEST_EXTRA_COVERAGE_GLOB
5062       A list of regular expressions which will be used to  find  files  which
5063       should be covered by the ctest_coverage() command.
5064
5065       It is initialized by ctest(1), but may be edited in a CTestCustom file.
5066       See ctest_read_custom_files() documentation.
5067
5068   CTEST_GIT_COMMAND
5069       Specify the CTest GITCommand setting in  a  ctest(1)  dashboard  client
5070       script.
5071
5072   CTEST_GIT_INIT_SUBMODULES
5073       Specify  the  CTest  GITInitSubmodules  setting in a ctest(1) dashboard
5074       client script.
5075
5076   CTEST_GIT_UPDATE_CUSTOM
5077       Specify the CTest  GITUpdateCustom  setting  in  a  ctest(1)  dashboard
5078       client script.
5079
5080   CTEST_GIT_UPDATE_OPTIONS
5081       Specify  the  CTest  GITUpdateOptions  setting  in a ctest(1) dashboard
5082       client script.
5083
5084   CTEST_HG_COMMAND
5085       Specify the CTest HGCommand setting  in  a  ctest(1)  dashboard  client
5086       script.
5087
5088   CTEST_HG_UPDATE_OPTIONS
5089       Specify  the  CTest  HGUpdateOptions  setting  in  a ctest(1) dashboard
5090       client script.
5091
5092   CTEST_LABELS_FOR_SUBPROJECTS
5093       Specify the CTest LabelsForSubprojects setting in a ctest(1)  dashboard
5094       client script.
5095
5096   CTEST_MEMORYCHECK_COMMAND
5097       Specify  the  CTest  MemoryCheckCommand setting in a ctest(1) dashboard
5098       client script.
5099
5100   CTEST_MEMORYCHECK_COMMAND_OPTIONS
5101       Specify the CTest MemoryCheckCommandOptions setting in a ctest(1) dash‐
5102       board client script.
5103
5104   CTEST_MEMORYCHECK_SANITIZER_OPTIONS
5105       Specify  the  CTest  MemoryCheckSanitizerOptions  setting in a ctest(1)
5106       dashboard client script.
5107
5108   CTEST_MEMORYCHECK_SUPPRESSIONS_FILE
5109       Specify the CTest  MemoryCheckSuppressionFile  setting  in  a  ctest(1)
5110       dashboard client script.
5111
5112   CTEST_MEMORYCHECK_TYPE
5113       Specify  the  CTest  MemoryCheckType  setting  in  a ctest(1) dashboard
5114       client script.  Valid values are Valgrind, Purify,  BoundsChecker,  and
5115       ThreadSanitizer,  AddressSanitizer, LeakSanitizer, MemorySanitizer, and
5116       UndefinedBehaviorSanitizer.
5117
5118   CTEST_NIGHTLY_START_TIME
5119       Specify the CTest NightlyStartTime  setting  in  a  ctest(1)  dashboard
5120       client script.
5121
5122   CTEST_P4_CLIENT
5123       Specify  the  CTest  P4Client  setting  in  a ctest(1) dashboard client
5124       script.
5125
5126   CTEST_P4_COMMAND
5127       Specify the CTest P4Command setting  in  a  ctest(1)  dashboard  client
5128       script.
5129
5130   CTEST_P4_OPTIONS
5131       Specify  the  CTest  P4Options  setting  in a ctest(1) dashboard client
5132       script.
5133
5134   CTEST_P4_UPDATE_OPTIONS
5135       Specify the CTest  P4UpdateOptions  setting  in  a  ctest(1)  dashboard
5136       client script.
5137
5138   CTEST_RUN_CURRENT_SCRIPT
5139       Setting  this  to  0  prevents  ctest(1)  from  being run again when it
5140       reaches the end of a script run by calling ctest -S.
5141
5142   CTEST_SCP_COMMAND
5143       Legacy option.  Not used.
5144
5145   CTEST_SITE
5146       Specify the CTest Site setting in a ctest(1) dashboard client script.
5147
5148   CTEST_SUBMIT_URL
5149       Specify the CTest SubmitURL setting  in  a  ctest(1)  dashboard  client
5150       script.
5151
5152   CTEST_SOURCE_DIRECTORY
5153       Specify  the  CTest  SourceDirectory  setting  in  a ctest(1) dashboard
5154       client script.
5155
5156   CTEST_SVN_COMMAND
5157       Specify the CTest SVNCommand setting in  a  ctest(1)  dashboard  client
5158       script.
5159
5160   CTEST_SVN_OPTIONS
5161       Specify  the  CTest  SVNOptions  setting in a ctest(1) dashboard client
5162       script.
5163
5164   CTEST_SVN_UPDATE_OPTIONS
5165       Specify the CTest SVNUpdateOptions  setting  in  a  ctest(1)  dashboard
5166       client script.
5167
5168   CTEST_TEST_LOAD
5169       Specify the TestLoad setting in the CTest Test Step of a ctest(1) dash‐
5170       board client script.  This sets the default  value  for  the  TEST_LOAD
5171       option of the ctest_test() command.
5172
5173   CTEST_TEST_TIMEOUT
5174       Specify  the  CTest  TimeOut  setting  in  a  ctest(1) dashboard client
5175       script.
5176
5177   CTEST_TRIGGER_SITE
5178       Legacy option.  Not used.
5179
5180   CTEST_UPDATE_COMMAND
5181       Specify the CTest UpdateCommand setting in a ctest(1) dashboard  client
5182       script.
5183
5184   CTEST_UPDATE_OPTIONS
5185       Specify  the CTest UpdateOptions setting in a ctest(1) dashboard client
5186       script.
5187
5188   CTEST_UPDATE_VERSION_ONLY
5189       Specify the CTest UpdateVersionOnly setting  in  a  ctest(1)  dashboard
5190       client script.
5191
5192   CTEST_UPDATE_VERSION_OVERRIDE
5193       Specify the CTest UpdateVersionOverride setting in a ctest(1) dashboard
5194       client script.
5195
5196   CTEST_USE_LAUNCHERS
5197       Specify the CTest UseLaunchers setting in a ctest(1)  dashboard  client
5198       script.
5199

VARIABLES FOR CPACK

5201   CPACK_ABSOLUTE_DESTINATION_FILES
5202       List  of  files which have been installed using an ABSOLUTE DESTINATION
5203       path.
5204
5205       This variable is a Read-Only variable which is set internally by  CPack
5206       during  installation and before packaging using CMAKE_ABSOLUTE_DESTINA‐
5207       TION_FILES defined in cmake_install.cmake scripts.  The  value  can  be
5208       used  within  CPack  project configuration file and/or CPack<GEN>.cmake
5209       file of <GEN> generator.
5210
5211   CPACK_COMPONENT_INCLUDE_TOPLEVEL_DIRECTORY
5212       Boolean toggle to include/exclude top level directory (component case).
5213
5214       Similar usage as CPACK_INCLUDE_TOPLEVEL_DIRECTORY but for the component
5215       case.    See  CPACK_INCLUDE_TOPLEVEL_DIRECTORY  documentation  for  the
5216       detail.
5217
5218   CPACK_ERROR_ON_ABSOLUTE_INSTALL_DESTINATION
5219       Ask CPack to error out as soon as a file with absolute INSTALL DESTINA‐
5220       TION is encountered.
5221
5222       The  fatal  error  is  emitted before the installation of the offending
5223       file takes place.  Some  CPack  generators,  like  NSIS,  enforce  this
5224       internally.     This    variable    triggers    the    definition    of
5225       CMAKE_ERROR_ON_ABSOLUTE_INSTALL_DESTINATION when CPack runs.
5226
5227   CPACK_INCLUDE_TOPLEVEL_DIRECTORY
5228       Boolean toggle to include/exclude top level directory.
5229
5230       When preparing a package CPack installs the item  under  the  so-called
5231       top  level  directory.  The purpose of is to include (set to 1 or ON or
5232       TRUE) the top level directory in the package or not (set to 0 or OFF or
5233       FALSE).
5234
5235       Each  CPack  generator  has a built-in default value for this variable.
5236       E.g.  Archive generators (ZIP, TGZ, …) includes the top  level  whereas
5237       RPM  or  DEB don’t.  The user may override the default value by setting
5238       this variable.
5239
5240       There is a similar variable  CPACK_COMPONENT_INCLUDE_TOPLEVEL_DIRECTORY
5241       which  may be used to override the behavior for the component packaging
5242       case which may have different default value for historical  (now  back‐
5243       ward compatibility) reason.
5244
5245   CPACK_INSTALL_DEFAULT_DIRECTORY_PERMISSIONS
5246       Default  permissions  for implicitly created directories during packag‐
5247       ing.
5248
5249       This  variable  serves  the  same  purpose  during  packaging  as   the
5250       CMAKE_INSTALL_DEFAULT_DIRECTORY_PERMISSIONS   variable   serves  during
5251       installation (e.g. make install).
5252
5253       If include(CPack) is used then by default this variable is set  to  the
5254       content of CMAKE_INSTALL_DEFAULT_DIRECTORY_PERMISSIONS.
5255
5256   CPACK_PACKAGING_INSTALL_PREFIX
5257       The prefix used in the built package.
5258
5259       Each  CPack  generator  has  a default value (like /usr).  This default
5260       value may be overwritten from the CMakeLists.txt or the  cpack(1)  com‐
5261       mand line by setting an alternative value.  Example:
5262
5263          set(CPACK_PACKAGING_INSTALL_PREFIX "/opt")
5264
5265       This is not the same purpose as CMAKE_INSTALL_PREFIX which is used when
5266       installing from the build tree without building a package.
5267
5268   CPACK_SET_DESTDIR
5269       Boolean toggle to make CPack use DESTDIR mechanism when packaging.
5270
5271       DESTDIR means DESTination DIRectory.  It is commonly used  by  makefile
5272       users  in  order  to install software at non-default location.  It is a
5273       basic relocation mechanism that should not  be  used  on  Windows  (see
5274       CMAKE_INSTALL_PREFIX documentation).  It is usually invoked like this:
5275
5276          make DESTDIR=/home/john install
5277
5278       which  will  install the concerned software using the installation pre‐
5279       fix, e.g. /usr/local prepended with the  DESTDIR  value  which  finally
5280       gives  /home/john/usr/local.   When  preparing  a  package, CPack first
5281       installs the items to be packaged in a local (to the build tree) direc‐
5282       tory   by   using   the   same  DESTDIR  mechanism.   Nevertheless,  if
5283       CPACK_SET_DESTDIR is set then CPack will set DESTDIR before  doing  the
5284       local   install.   The  most  noticeable  difference  is  that  without
5285       CPACK_SET_DESTDIR, CPack uses CPACK_PACKAGING_INSTALL_PREFIX as a  pre‐
5286       fix    whereas    with    CPACK_SET_DESTDIR   set,   CPack   will   use
5287       CMAKE_INSTALL_PREFIX as a prefix.
5288
5289       Manually setting CPACK_SET_DESTDIR may help (or simply be necessary) if
5290       some  install rules uses absolute DESTINATION (see CMake install() com‐
5291       mand).  However, starting with CPack/CMake 2.8.3 RPM and DEB installers
5292       tries  to  handle  DESTDIR automatically so that it is seldom necessary
5293       for the user to set it.
5294
5295   CPACK_WARN_ON_ABSOLUTE_INSTALL_DESTINATION
5296       Ask CPack to warn each time a file with absolute INSTALL DESTINATION is
5297       encountered.
5298
5299       This   variable   triggers   the   definition   of  CMAKE_WARN_ON_ABSO‐
5300       LUTE_INSTALL_DESTINATION when CPack runs cmake_install.cmake scripts.
5301

VARIABLE EXPANSION OPERATORS

5303   CACHE
5304       Operator to read cache variables.
5305
5306       Use the syntax $CACHE{VAR} to read cache entry VAR.  See the cmake-lan‐
5307       guage(7) variables documentation for more complete documentation of the
5308       interaction of normal variables and cache entries.
5309
5310       When evaluating Variable References of the  form  ${VAR},  CMake  first
5311       searches  for  a normal variable with that name, and if not found CMake
5312       will search for a cache entry with that name.  The  $CACHE{VAR}  syntax
5313       can  be  used  to do direct cache lookup and ignore any existing normal
5314       variable.
5315
5316       See the set() and unset() commands to see how to write or remove  cache
5317       variables.
5318
5319   ENV
5320       Operator to read environment variables.
5321
5322       Use the syntax $ENV{VAR} to read environment variable VAR.
5323
5324       To  test  whether an environment variable is defined, use the signature
5325       if(DEFINED ENV{<name>}) of the if() command.
5326
5327       See the set() and unset() commands to see how to write or remove  envi‐
5328       ronment variables.
5329

INTERNAL VARIABLES

5331       CMake  has  many  internal  variables.   Most of them are undocumented.
5332       Some of them, however, were at some point  described  as  normal  vari‐
5333       ables,  and  therefore may be encountered in legacy code. They are sub‐
5334       ject to change, and not recommended for use in project code.
5335
5336   CMAKE_HOME_DIRECTORY
5337       Path to top of source tree. Same as CMAKE_SOURCE_DIR.
5338
5339       This is an internal cache entry used to  locate  the  source  directory
5340       when loading a CMakeCache.txt from a build tree.  It should not be used
5341       in project code.  The variable CMAKE_SOURCE_DIR has the same value  and
5342       should be preferred.
5343
5344   CMAKE_INTERNAL_PLATFORM_ABI
5345       An internal variable subject to change.
5346
5347       This is used in determining the compiler ABI and is subject to change.
5348
5349   CMAKE_<LANG>_COMPILER_ABI
5350       An internal variable subject to change.
5351
5352       This is used in determining the compiler ABI and is subject to change.
5353
5354   CMAKE_<LANG>_COMPILER_ARCHITECTURE_ID
5355       An internal variable subject to change.
5356
5357       This  is used to identify the variant of a compiler based on its target
5358       architecture.  For some compilers this is needed to determine the  cor‐
5359       rect usage.
5360
5361   CMAKE_<LANG>_COMPILER_VERSION_INTERNAL
5362       An internal variable subject to change.
5363
5364       This is used to identify the variant of a compiler based on an internal
5365       version number.  For some compilers this is  needed  to  determine  the
5366       correct usage.
5367
5368   CMAKE_<LANG>_PLATFORM_ID
5369       An internal variable subject to change.
5370
5371       This is used in determining the platform and is subject to change.
5372
5373   CMAKE_NOT_USING_CONFIG_FLAGS
5374       Skip _BUILD_TYPE flags if true.
5375
5376       This  is an internal flag used by the generators in CMake to tell CMake
5377       to skip the _BUILD_TYPE flags.
5378
5379   CMAKE_VS_INTEL_Fortran_PROJECT_VERSION
5380       When generating for Visual Studio 9 2008 or greater with the Intel For‐
5381       tran  plugin  installed, this specifies the .vfproj project file format
5382       version.  This is intended for internal use by CMake and should not  be
5383       used by project code.
5384
5386       2000-2019 Kitware, Inc. and Contributors
5387
5388
5389
5390
53913.16.1                           Dec 14, 2019               CMAKE-VARIABLES(7)
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