MirBSD manpage: gccmakedep(1)

gccmakedep(1)       UNIX Programmer's Manual        gccmakedep(1)


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


     gccmakedep [ -sseparator ] [ -fmakefile ] [ -a ] [ --
     options -- ] sourcefile ...


     The gccmakedep program calls 'gcc -M' to output makefile
     rules describing the dependencies of each sourcefile, so
     that make(1) knows which object files must be recompiled
     when a dependency has changed.

     By default, gccmakedep places its output in the file named
     makefile if it exists, otherwise Makefile. An alternate
     makefile may be specified with the -f option. It first
     searches the makefile for a line beginning with

         # DO NOT DELETE

     or one provided with the -s option, as a delimiter for the
     dependency output. If it finds it, it will delete everything
     following this up to the end of the makefile and put the
     output after this line. If it doesn't find it, the program
     will append the string to the makefile and place the output
     after that.


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


     The program will ignore any option that it does not under-
     stand, so you may use the same arguments that you would for
     gcc(1), including -D and -U options to define and undefine
     symbols and -I to set the include path.

     -a   Append the dependencies to the file instead of replac-
          ing existing dependencies.

          Filename. This allows you to specify an alternate
          makefile in which gccmakedep can place its output.
          Specifying - as the file name (that is, -f-) sends the
          output to standard output instead of modifying an
          existing file.

XFree86                   Version 4.5.0                         1

gccmakedep(1)       UNIX Programmer's Manual        gccmakedep(1)

          Starting string delimiter. This option permits you to
          specify a different string for gccmakedep to look for
          in the makefile. The default is # DO NOT DELETE.

     -- options --
          If gccmakedep encounters a double hyphen (--) in the
          argument list, then any unrecognized arguments follow-
          ing it will be silently ignored. A second double hyphen
          terminates this special treatment. In this way, gccmak-
          edep can be made to safely ignore esoteric compiler
          arguments that might normally be found in a CFLAGS make
          macro (see the EXAMPLE section above). -D, -I, and -U
          options appearing between the pair of double hyphens
          are still processed normally.


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


     gccmakedep was written by the XFree86 Project based on code
     supplied by Hongjiu Lu.

     Colin Watson wrote this manual page, originally for the
     Debian Project, based partly on the manual page for mak-

XFree86                   Version 4.5.0                         2

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