1gccmakedep(1)               General Commands Manual              gccmakedep(1)
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NAME

6       gccmakedep - create dependencies in makefiles using 'gcc -M'
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SYNOPSIS

9       gccmakedep  [  -sseparator  ]  [  -fmakefile ] [ -a ] [ -- options -- ]
10       sourcefile ...
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DESCRIPTION

13       The gccmakedep program calls 'gcc -M' to output makefile rules describ‐
14       ing  the  dependencies  of each sourcefile, so that make(1) knows which
15       object files must be recompiled when a dependency has changed.
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17       By default, gccmakedep places its output in the file named makefile  if
18       it  exists, otherwise Makefile.  An alternate makefile may be specified
19       with the -f option.  It first searches the makefile for a  line  begin‐
20       ning with
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22           # DO NOT DELETE
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24       or  one  provided with the -s option, as a delimiter for the dependency
25       output.  If it finds it, it will delete everything following this up to
26       the  end  of  the  makefile  and put the output after this line.  If it
27       doesn't find it, the program will append the string to the makefile and
28       place the output after that.
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EXAMPLE

31       Normally,  gccmakedep  will be used in a makefile target so that typing
32       'make depend' will bring the dependencies up to date for the  makefile.
33       For example,
34           SRCS = file1.c file2.c ...
35           CFLAGS = -O -DHACK -I../foobar -xyz
36           depend:
37                   gccmakedep -- $(CFLAGS) -- $(SRCS)
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OPTIONS

40       The  program will ignore any option that it does not understand, so you
41       may use the same arguments that you would for gcc(1), including -D  and
42       -U  options  to  define  and undefine symbols and -I to set the include
43       path.
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45       -a     Append the dependencies to the file instead of replacing  exist‐
46              ing dependencies.
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48       -fmakefile
49              Filename.   This  allows you to specify an alternate makefile in
50              which gccmakedep can place its output.  Specifying  “-”  as  the
51              file  name  (that  is,  -f-) sends the output to standard output
52              instead of modifying an existing file.
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54       -sstring
55              Starting string delimiter.  This option permits you to specify a
56              different  string  for  gccmakedep  to look for in the makefile.
57              The default is “# DO NOT DELETE”.
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59       -- options --
60              If gccmakedep encounters a double hyphen (--)  in  the  argument
61              list,  then  any  unrecognized  arguments  following  it will be
62              silently ignored.  A second double hyphen terminates  this  spe‐
63              cial  treatment.   In this way, gccmakedep can be made to safely
64              ignore esoteric compiler arguments that might normally be  found
65              in a CFLAGS make macro (see the EXAMPLE section above).  -D, -I,
66              and -U options appearing between the pair of double hyphens  are
67              still processed normally.
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SEE ALSO

70       gcc(1), make(1), makedepend(1).
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AUTHOR

73       The version of the gccmakedep included in this X.Org Foundation release
74       was originally written by the XFree86 Project based on code supplied by
75       Hongjiu Lu.
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77       Colin Watson wrote this manual page, originally for the Debian Project,
78       based partly on the manual page for makedepend(1).
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82X Version 11                   gccmakedep 1.0.3                  gccmakedep(1)