1CPP(1)                                GNU                               CPP(1)
2
3
4

NAME

6       cpp - The C Preprocessor
7

SYNOPSIS

9       cpp [-Dmacro[=defn]...] [-Umacro]
10           [-Idir...] [-iquotedir...]
11           [-Wwarn...]
12           [-M-MM] [-MG] [-MF filename]
13           [-MP] [-MQ target...]
14           [-MT target...]
15           [-P] [-fno-working-directory]
16           [-x language] [-std=standard]
17           infile outfile
18
19       Only the most useful options are listed here; see below for the remain‐
20       der.
21

DESCRIPTION

23       The C preprocessor, often known as cpp, is a macro processor that is
24       used automatically by the C compiler to transform your program before
25       compilation.  It is called a macro processor because it allows you to
26       define macros, which are brief abbreviations for longer constructs.
27
28       The C preprocessor is intended to be used only with C, C++, and Objec‐
29       tive-C source code.  In the past, it has been abused as a general text
30       processor.  It will choke on input which does not obey C's lexical
31       rules.  For example, apostrophes will be interpreted as the beginning
32       of character constants, and cause errors.  Also, you cannot rely on it
33       preserving characteristics of the input which are not significant to
34       C-family languages.  If a Makefile is preprocessed, all the hard tabs
35       will be removed, and the Makefile will not work.
36
37       Having said that, you can often get away with using cpp on things which
38       are not C.  Other Algol-ish programming languages are often safe (Pas‐
39       cal, Ada, etc.) So is assembly, with caution.  -traditional-cpp mode
40       preserves more white space, and is otherwise more permissive.  Many of
41       the problems can be avoided by writing C or C++ style comments instead
42       of native language comments, and keeping macros simple.
43
44       Wherever possible, you should use a preprocessor geared to the language
45       you are writing in.  Modern versions of the GNU assembler have macro
46       facilities.  Most high level programming languages have their own con‐
47       ditional compilation and inclusion mechanism.  If all else fails, try a
48       true general text processor, such as GNU M4.
49
50       C preprocessors vary in some details.  This manual discusses the GNU C
51       preprocessor, which provides a small superset of the features of ISO
52       Standard C.  In its default mode, the GNU C preprocessor does not do a
53       few things required by the standard.  These are features which are
54       rarely, if ever, used, and may cause surprising changes to the meaning
55       of a program which does not expect them.  To get strict ISO Standard C,
56       you should use the -std=c89 or -std=c99 options, depending on which
57       version of the standard you want.  To get all the mandatory diagnos‐
58       tics, you must also use -pedantic.
59
60       This manual describes the behavior of the ISO preprocessor.  To mini‐
61       mize gratuitous differences, where the ISO preprocessor's behavior does
62       not conflict with traditional semantics, the traditional preprocessor
63       should behave the same way.  The various differences that do exist are
64       detailed in the section Traditional Mode.
65
66       For clarity, unless noted otherwise, references to CPP in this manual
67       refer to GNU CPP.
68

OPTIONS

70       The C preprocessor expects two file names as arguments, infile and out‐
71       file.  The preprocessor reads infile together with any other files it
72       specifies with #include.  All the output generated by the combined
73       input files is written in outfile.
74
75       Either infile or outfile may be -, which as infile means to read from
76       standard input and as outfile means to write to standard output.  Also,
77       if either file is omitted, it means the same as if - had been specified
78       for that file.
79
80       Unless otherwise noted, or the option ends in =, all options which take
81       an argument may have that argument appear either immediately after the
82       option, or with a space between option and argument: -Ifoo and -I foo
83       have the same effect.
84
85       Many options have multi-letter names; therefore multiple single-letter
86       options may not be grouped: -dM is very different from -d -M.
87
88       -D name
89           Predefine name as a macro, with definition 1.
90
91       -D name=definition
92           The contents of definition are tokenized and processed as if they
93           appeared during translation phase three in a #define directive.  In
94           particular, the definition will be truncated by embedded newline
95           characters.
96
97           If you are invoking the preprocessor from a shell or shell-like
98           program you may need to use the shell's quoting syntax to protect
99           characters such as spaces that have a meaning in the shell syntax.
100
101           If you wish to define a function-like macro on the command line,
102           write its argument list with surrounding parentheses before the
103           equals sign (if any).  Parentheses are meaningful to most shells,
104           so you will need to quote the option.  With sh and csh,
105           -D'name(args...)=definition' works.
106
107           -D and -U options are processed in the order they are given on the
108           command line.  All -imacros file and -include file options are pro‐
109           cessed after all -D and -U options.
110
111       -U name
112           Cancel any previous definition of name, either built in or provided
113           with a -D option.
114
115       -undef
116           Do not predefine any system-specific or GCC-specific macros.  The
117           standard predefined macros remain defined.
118
119       -I dir
120           Add the directory dir to the list of directories to be searched for
121           header files.
122
123           Directories named by -I are searched before the standard system
124           include directories.  If the directory dir is a standard system
125           include directory, the option is ignored to ensure that the default
126           search order for system directories and the special treatment of
127           system headers are not defeated .
128
129       -o file
130           Write output to file.  This is the same as specifying file as the
131           second non-option argument to cpp.  gcc has a different interpreta‐
132           tion of a second non-option argument, so you must use -o to specify
133           the output file.
134
135       -Wall
136           Turns on all optional warnings which are desirable for normal code.
137           At present this is -Wcomment, -Wtrigraphs, -Wmultichar and a warn‐
138           ing about integer promotion causing a change of sign in "#if"
139           expressions.  Note that many of the preprocessor's warnings are on
140           by default and have no options to control them.
141
142       -Wcomment
143       -Wcomments
144           Warn whenever a comment-start sequence /* appears in a /* comment,
145           or whenever a backslash-newline appears in a // comment.  (Both
146           forms have the same effect.)
147
148       -Wtrigraphs
149           @anchor{Wtrigraphs} Most trigraphs in comments cannot affect the
150           meaning of the program.  However, a trigraph that would form an
151           escaped newline (??/ at the end of a line) can, by changing where
152           the comment begins or ends.  Therefore, only trigraphs that would
153           form escaped newlines produce warnings inside a comment.
154
155           This option is implied by -Wall.  If -Wall is not given, this
156           option is still enabled unless trigraphs are enabled.  To get tri‐
157           graph conversion without warnings, but get the other -Wall warn‐
158           ings, use -trigraphs -Wall -Wno-trigraphs.
159
160       -Wtraditional
161           Warn about certain constructs that behave differently in tradi‐
162           tional and ISO C.  Also warn about ISO C constructs that have no
163           traditional C equivalent, and problematic constructs which should
164           be avoided.
165
166       -Wimport
167           Warn the first time #import is used.
168
169       -Wundef
170           Warn whenever an identifier which is not a macro is encountered in
171           an #if directive, outside of defined.  Such identifiers are
172           replaced with zero.
173
174       -Wunused-macros
175           Warn about macros defined in the main file that are unused.  A
176           macro is used if it is expanded or tested for existence at least
177           once.  The preprocessor will also warn if the macro has not been
178           used at the time it is redefined or undefined.
179
180           Built-in macros, macros defined on the command line, and macros
181           defined in include files are not warned about.
182
183           Note: If a macro is actually used, but only used in skipped condi‐
184           tional blocks, then CPP will report it as unused.  To avoid the
185           warning in such a case, you might improve the scope of the macro's
186           definition by, for example, moving it into the first skipped block.
187           Alternatively, you could provide a dummy use with something like:
188
189                   #if defined the_macro_causing_the_warning
190                   #endif
191
192       -Wendif-labels
193           Warn whenever an #else or an #endif are followed by text.  This
194           usually happens in code of the form
195
196                   #if FOO
197                   ...
198                   #else FOO
199                   ...
200                   #endif FOO
201
202           The second and third "FOO" should be in comments, but often are not
203           in older programs.  This warning is on by default.
204
205       -Werror
206           Make all warnings into hard errors.  Source code which triggers
207           warnings will be rejected.
208
209       -Wsystem-headers
210           Issue warnings for code in system headers.  These are normally
211           unhelpful in finding bugs in your own code, therefore suppressed.
212           If you are responsible for the system library, you may want to see
213           them.
214
215       -w  Suppress all warnings, including those which GNU CPP issues by
216           default.
217
218       -pedantic
219           Issue all the mandatory diagnostics listed in the C standard.  Some
220           of them are left out by default, since they trigger frequently on
221           harmless code.
222
223       -pedantic-errors
224           Issue all the mandatory diagnostics, and make all mandatory diag‐
225           nostics into errors.  This includes mandatory diagnostics that GCC
226           issues without -pedantic but treats as warnings.
227
228       -M  Instead of outputting the result of preprocessing, output a rule
229           suitable for make describing the dependencies of the main source
230           file.  The preprocessor outputs one make rule containing the object
231           file name for that source file, a colon, and the names of all the
232           included files, including those coming from -include or -imacros
233           command line options.
234
235           Unless specified explicitly (with -MT or -MQ), the object file name
236           consists of the basename of the source file with any suffix
237           replaced with object file suffix.  If there are many included files
238           then the rule is split into several lines using \-newline.  The
239           rule has no commands.
240
241           This option does not suppress the preprocessor's debug output, such
242           as -dM.  To avoid mixing such debug output with the dependency
243           rules you should explicitly specify the dependency output file with
244           -MF, or use an environment variable like DEPENDENCIES_OUTPUT.
245           Debug output will still be sent to the regular output stream as
246           normal.
247
248           Passing -M to the driver implies -E, and suppresses warnings with
249           an implicit -w.
250
251       -MM Like -M but do not mention header files that are found in system
252           header directories, nor header files that are included, directly or
253           indirectly, from such a header.
254
255           This implies that the choice of angle brackets or double quotes in
256           an #include directive does not in itself determine whether that
257           header will appear in -MM dependency output.  This is a slight
258           change in semantics from GCC versions 3.0 and earlier.
259
260           @anchor{dashMF}
261
262       -MF file
263           When used with -M or -MM, specifies a file to write the dependen‐
264           cies to.  If no -MF switch is given the preprocessor sends the
265           rules to the same place it would have sent preprocessed output.
266
267           When used with the driver options -MD or -MMD, -MF overrides the
268           default dependency output file.
269
270       -MG In conjunction with an option such as -M requesting dependency gen‐
271           eration, -MG assumes missing header files are generated files and
272           adds them to the dependency list without raising an error.  The
273           dependency filename is taken directly from the "#include" directive
274           without prepending any path.  -MG also suppresses preprocessed out‐
275           put, as a missing header file renders this useless.
276
277           This feature is used in automatic updating of makefiles.
278
279       -MP This option instructs CPP to add a phony target for each dependency
280           other than the main file, causing each to depend on nothing.  These
281           dummy rules work around errors make gives if you remove header
282           files without updating the Makefile to match.
283
284           This is typical output:
285
286                   test.o: test.c test.h
287
288                   test.h:
289
290       -MT target
291           Change the target of the rule emitted by dependency generation.  By
292           default CPP takes the name of the main input file, including any
293           path, deletes any file suffix such as .c, and appends the plat‐
294           form's usual object suffix.  The result is the target.
295
296           An -MT option will set the target to be exactly the string you
297           specify.  If you want multiple targets, you can specify them as a
298           single argument to -MT, or use multiple -MT options.
299
300           For example, -MT '$(objpfx)foo.o' might give
301
302                   $(objpfx)foo.o: foo.c
303
304       -MQ target
305           Same as -MT, but it quotes any characters which are special to
306           Make.  -MQ '$(objpfx)foo.o' gives
307
308                   $$(objpfx)foo.o: foo.c
309
310           The default target is automatically quoted, as if it were given
311           with -MQ.
312
313       -MD -MD is equivalent to -M -MF file, except that -E is not implied.
314           The driver determines file based on whether an -o option is given.
315           If it is, the driver uses its argument but with a suffix of .d,
316           otherwise it take the basename of the input file and applies a .d
317           suffix.
318
319           If -MD is used in conjunction with -E, any -o switch is understood
320           to specify the dependency output file (but @pxref{dashMF,,-MF}),
321           but if used without -E, each -o is understood to specify a target
322           object file.
323
324           Since -E is not implied, -MD can be used to generate a dependency
325           output file as a side-effect of the compilation process.
326
327       -MMD
328           Like -MD except mention only user header files, not system header
329           files.
330
331       -x c
332       -x c++
333       -x objective-c
334       -x assembler-with-cpp
335           Specify the source language: C, C++, Objective-C, or assembly.
336           This has nothing to do with standards conformance or extensions; it
337           merely selects which base syntax to expect.  If you give none of
338           these options, cpp will deduce the language from the extension of
339           the source file: .c, .cc, .m, or .S.  Some other common extensions
340           for C++ and assembly are also recognized.  If cpp does not recog‐
341           nize the extension, it will treat the file as C; this is the most
342           generic mode.
343
344           Note: Previous versions of cpp accepted a -lang option which
345           selected both the language and the standards conformance level.
346           This option has been removed, because it conflicts with the -l
347           option.
348
349       -std=standard
350       -ansi
351           Specify the standard to which the code should conform.  Currently
352           CPP knows about C and C++ standards; others may be added in the
353           future.
354
355           standard may be one of:
356
357           "iso9899:1990"
358           "c89"
359               The ISO C standard from 1990.  c89 is the customary shorthand
360               for this version of the standard.
361
362               The -ansi option is equivalent to -std=c89.
363
364           "iso9899:199409"
365               The 1990 C standard, as amended in 1994.
366
367           "iso9899:1999"
368           "c99"
369           "iso9899:199x"
370           "c9x"
371               The revised ISO C standard, published in December 1999.  Before
372               publication, this was known as C9X.
373
374           "gnu89"
375               The 1990 C standard plus GNU extensions.  This is the default.
376
377           "gnu99"
378           "gnu9x"
379               The 1999 C standard plus GNU extensions.
380
381           "c++98"
382               The 1998 ISO C++ standard plus amendments.
383
384           "gnu++98"
385               The same as -std=c++98 plus GNU extensions.  This is the
386               default for C++ code.
387
388       -I- Split the include path.  Any directories specified with -I options
389           before -I- are searched only for headers requested with
390           "#include "file""; they are not searched for "#include <file>".  If
391           additional directories are specified with -I options after the -I-,
392           those directories are searched for all #include directives.
393
394           In addition, -I- inhibits the use of the directory of the current
395           file directory as the first search directory for "#include "file"".
396
397           This option has been deprecated.
398
399       -nostdinc
400           Do not search the standard system directories for header files.
401           Only the directories you have specified with -I options (and the
402           directory of the current file, if appropriate) are searched.
403
404       -nostdinc++
405           Do not search for header files in the C++-specific standard direc‐
406           tories, but do still search the other standard directories.  (This
407           option is used when building the C++ library.)
408
409       -include file
410           Process file as if "#include "file"" appeared as the first line of
411           the primary source file.  However, the first directory searched for
412           file is the preprocessor's working directory instead of the direc‐
413           tory containing the main source file.  If not found there, it is
414           searched for in the remainder of the "#include "..."" search chain
415           as normal.
416
417           If multiple -include options are given, the files are included in
418           the order they appear on the command line.
419
420       -imacros file
421           Exactly like -include, except that any output produced by scanning
422           file is thrown away.  Macros it defines remain defined.  This
423           allows you to acquire all the macros from a header without also
424           processing its declarations.
425
426           All files specified by -imacros are processed before all files
427           specified by -include.
428
429       -idirafter dir
430           Search dir for header files, but do it after all directories speci‐
431           fied with -I and the standard system directories have been
432           exhausted.  dir is treated as a system include directory.
433
434       -iprefix prefix
435           Specify prefix as the prefix for subsequent -iwithprefix options.
436           If the prefix represents a directory, you should include the final
437           /.
438
439       -iwithprefix dir
440       -iwithprefixbefore dir
441           Append dir to the prefix specified previously with -iprefix, and
442           add the resulting directory to the include search path.  -iwithpre‐
443           fixbefore puts it in the same place -I would; -iwithprefix puts it
444           where -idirafter would.
445
446       -isysroot dir
447           This option is like the --sysroot option, but applies only to
448           header files.  See the --sysroot option for more information.
449
450       -isystem dir
451           Search dir for header files, after all directories specified by -I
452           but before the standard system directories.  Mark it as a system
453           directory, so that it gets the same special treatment as is applied
454           to the standard system directories.
455
456       -iquote dir
457           Search dir only for header files requested with "#include "file"";
458           they are not searched for "#include <file>", before all directories
459           specified by -I and before the standard system directories.
460
461       -fdollars-in-identifiers
462           @anchor{fdollars-in-identifiers} Accept $ in identifiers.
463
464       -fextended-identifiers
465           Accept universal character names in identifiers.  This option is
466           experimental; in a future version of GCC, it will be enabled by
467           default for C99 and C++.
468
469       -fpreprocessed
470           Indicate to the preprocessor that the input file has already been
471           preprocessed.  This suppresses things like macro expansion, tri‐
472           graph conversion, escaped newline splicing, and processing of most
473           directives.  The preprocessor still recognizes and removes com‐
474           ments, so that you can pass a file preprocessed with -C to the com‐
475           piler without problems.  In this mode the integrated preprocessor
476           is little more than a tokenizer for the front ends.
477
478           -fpreprocessed is implicit if the input file has one of the exten‐
479           sions .i, .ii or .mi.  These are the extensions that GCC uses for
480           preprocessed files created by -save-temps.
481
482       -ftabstop=width
483           Set the distance between tab stops.  This helps the preprocessor
484           report correct column numbers in warnings or errors, even if tabs
485           appear on the line.  If the value is less than 1 or greater than
486           100, the option is ignored.  The default is 8.
487
488       -fexec-charset=charset
489           Set the execution character set, used for string and character con‐
490           stants.  The default is UTF-8.  charset can be any encoding sup‐
491           ported by the system's "iconv" library routine.
492
493       -fwide-exec-charset=charset
494           Set the wide execution character set, used for wide string and
495           character constants.  The default is UTF-32 or UTF-16, whichever
496           corresponds to the width of "wchar_t".  As with -fexec-charset,
497           charset can be any encoding supported by the system's "iconv"
498           library routine; however, you will have problems with encodings
499           that do not fit exactly in "wchar_t".
500
501       -finput-charset=charset
502           Set the input character set, used for translation from the charac‐
503           ter set of the input file to the source character set used by GCC.
504           If the locale does not specify, or GCC cannot get this information
505           from the locale, the default is UTF-8.  This can be overridden by
506           either the locale or this command line option.  Currently the com‐
507           mand line option takes precedence if there's a conflict.  charset
508           can be any encoding supported by the system's "iconv" library rou‐
509           tine.
510
511       -fworking-directory
512           Enable generation of linemarkers in the preprocessor output that
513           will let the compiler know the current working directory at the
514           time of preprocessing.  When this option is enabled, the preproces‐
515           sor will emit, after the initial linemarker, a second linemarker
516           with the current working directory followed by two slashes.  GCC
517           will use this directory, when it's present in the preprocessed
518           input, as the directory emitted as the current working directory in
519           some debugging information formats.  This option is implicitly
520           enabled if debugging information is enabled, but this can be inhib‐
521           ited with the negated form -fno-working-directory.  If the -P flag
522           is present in the command line, this option has no effect, since no
523           "#line" directives are emitted whatsoever.
524
525       -fno-show-column
526           Do not print column numbers in diagnostics.  This may be necessary
527           if diagnostics are being scanned by a program that does not under‐
528           stand the column numbers, such as dejagnu.
529
530       -A predicate=answer
531           Make an assertion with the predicate predicate and answer answer.
532           This form is preferred to the older form -A predicate(answer),
533           which is still supported, because it does not use shell special
534           characters.
535
536       -A -predicate=answer
537           Cancel an assertion with the predicate predicate and answer answer.
538
539       -dCHARS
540           CHARS is a sequence of one or more of the following characters, and
541           must not be preceded by a space.  Other characters are interpreted
542           by the compiler proper, or reserved for future versions of GCC, and
543           so are silently ignored.  If you specify characters whose behavior
544           conflicts, the result is undefined.
545
546           M   Instead of the normal output, generate a list of #define direc‐
547               tives for all the macros defined during the execution of the
548               preprocessor, including predefined macros.  This gives you a
549               way of finding out what is predefined in your version of the
550               preprocessor.  Assuming you have no file foo.h, the command
551
552                       touch foo.h; cpp -dM foo.h
553
554               will show all the predefined macros.
555
556           D   Like M except in two respects: it does not include the prede‐
557               fined macros, and it outputs both the #define directives and
558               the result of preprocessing.  Both kinds of output go to the
559               standard output file.
560
561           N   Like D, but emit only the macro names, not their expansions.
562
563           I   Output #include directives in addition to the result of prepro‐
564               cessing.
565
566       -P  Inhibit generation of linemarkers in the output from the preproces‐
567           sor.  This might be useful when running the preprocessor on some‐
568           thing that is not C code, and will be sent to a program which might
569           be confused by the linemarkers.
570
571       -C  Do not discard comments.  All comments are passed through to the
572           output file, except for comments in processed directives, which are
573           deleted along with the directive.
574
575           You should be prepared for side effects when using -C; it causes
576           the preprocessor to treat comments as tokens in their own right.
577           For example, comments appearing at the start of what would be a
578           directive line have the effect of turning that line into an ordi‐
579           nary source line, since the first token on the line is no longer a
580           #.
581
582       -CC Do not discard comments, including during macro expansion.  This is
583           like -C, except that comments contained within macros are also
584           passed through to the output file where the macro is expanded.
585
586           In addition to the side-effects of the -C option, the -CC option
587           causes all C++-style comments inside a macro to be converted to
588           C-style comments.  This is to prevent later use of that macro from
589           inadvertently commenting out the remainder of the source line.
590
591           The -CC option is generally used to support lint comments.
592
593       -traditional-cpp
594           Try to imitate the behavior of old-fashioned C preprocessors, as
595           opposed to ISO C preprocessors.
596
597       -trigraphs
598           Process trigraph sequences.
599
600       -remap
601           Enable special code to work around file systems which only permit
602           very short file names, such as MS-DOS.
603
604       --help
605       --target-help
606           Print text describing all the command line options instead of pre‐
607           processing anything.
608
609       -v  Verbose mode.  Print out GNU CPP's version number at the beginning
610           of execution, and report the final form of the include path.
611
612       -H  Print the name of each header file used, in addition to other nor‐
613           mal activities.  Each name is indented to show how deep in the
614           #include stack it is.  Precompiled header files are also printed,
615           even if they are found to be invalid; an invalid precompiled header
616           file is printed with ...x and a valid one with ...! .
617
618       -version
619       --version
620           Print out GNU CPP's version number.  With one dash, proceed to pre‐
621           process as normal.  With two dashes, exit immediately.
622

ENVIRONMENT

624       This section describes the environment variables that affect how CPP
625       operates.  You can use them to specify directories or prefixes to use
626       when searching for include files, or to control dependency output.
627
628       Note that you can also specify places to search using options such as
629       -I, and control dependency output with options like -M.  These take
630       precedence over environment variables, which in turn take precedence
631       over the configuration of GCC.
632
633       CPATH
634       C_INCLUDE_PATH
635       CPLUS_INCLUDE_PATH
636       OBJC_INCLUDE_PATH
637           Each variable's value is a list of directories separated by a spe‐
638           cial character, much like PATH, in which to look for header files.
639           The special character, "PATH_SEPARATOR", is target-dependent and
640           determined at GCC build time.  For Microsoft Windows-based targets
641           it is a semicolon, and for almost all other targets it is a colon.
642
643           CPATH specifies a list of directories to be searched as if speci‐
644           fied with -I, but after any paths given with -I options on the com‐
645           mand line.  This environment variable is used regardless of which
646           language is being preprocessed.
647
648           The remaining environment variables apply only when preprocessing
649           the particular language indicated.  Each specifies a list of direc‐
650           tories to be searched as if specified with -isystem, but after any
651           paths given with -isystem options on the command line.
652
653           In all these variables, an empty element instructs the compiler to
654           search its current working directory.  Empty elements can appear at
655           the beginning or end of a path.  For instance, if the value of
656           CPATH is ":/special/include", that has the same effect as
657           -I. -I/special/include.
658
659       DEPENDENCIES_OUTPUT
660           If this variable is set, its value specifies how to output depen‐
661           dencies for Make based on the non-system header files processed by
662           the compiler.  System header files are ignored in the dependency
663           output.
664
665           The value of DEPENDENCIES_OUTPUT can be just a file name, in which
666           case the Make rules are written to that file, guessing the target
667           name from the source file name.  Or the value can have the form
668           file target, in which case the rules are written to file file using
669           target as the target name.
670
671           In other words, this environment variable is equivalent to combin‐
672           ing the options -MM and -MF, with an optional -MT switch too.
673
674       SUNPRO_DEPENDENCIES
675           This variable is the same as DEPENDENCIES_OUTPUT (see above),
676           except that system header files are not ignored, so it implies -M
677           rather than -MM.  However, the dependence on the main input file is
678           omitted.
679

SEE ALSO

681       gpl(7), gfdl(7), fsf-funding(7), gcc(1), as(1), ld(1), and the Info
682       entries for cpp, gcc, and binutils.
683
685       Copyright (c) 1987, 1989, 1991, 1992, 1993, 1994, 1995, 1996, 1997,
686       1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005 Free Software Founda‐
687       tion, Inc.
688
689       Permission is granted to copy, distribute and/or modify this document
690       under the terms of the GNU Free Documentation License, Version 1.1 or
691       any later version published by the Free Software Foundation.  A copy of
692       the license is included in the man page gfdl(7).  This manual contains
693       no Invariant Sections.  The Front-Cover Texts are (a) (see below), and
694       the Back-Cover Texts are (b) (see below).
695
696       (a) The FSF's Front-Cover Text is:
697
698            A GNU Manual
699
700       (b) The FSF's Back-Cover Text is:
701
702            You have freedom to copy and modify this GNU Manual, like GNU
703            software.  Copies published by the Free Software Foundation raise
704            funds for GNU development.
705
706
707
708gcc-4.1.2                         2007-02-14                            CPP(1)
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