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gccmakedep(1)          DragonFly General Commands Manual         gccmakedep(1)

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

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

DESCRIPTION
       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.

EXAMPLE
       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
           depend:
                   gccmakedep -- $(CFLAGS) -- $(SRCS)

OPTIONS
       The program will ignore any option that it does not understand, 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 replacing
              existing dependencies.

       -fmakefile
              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.

       -sstring
              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 following it will be
              silently ignored.  A second double hyphen terminates this
              special treatment.  In this way, gccmakedep 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.

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

AUTHOR
       The version of the gccmakedep included in this X.Org Foundation release
       was originally 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 makedepend(1).

X Version 11                   gccmakedep 1.0.3                  gccmakedep(1)