ccmakedep - create dependencies in makefiles using a C compiler
ccmakedep [ cpp-flags ] [ -wwidth ] [
  -smagic-string ] [ -fmakefile ] [
  -oobject-suffix ] [ -v ] [ -a ] [
  -cccompiler ] [ -- options -- ] sourcefile ...
The ccmakedep program calls a C compiler to preprocess each
  sourcefile, and uses the output to construct makefile rules
  describing their dependencies. These rules instruct make(1) on which
  object files must be recompiled when a dependency has changed.
By default, ccmakedep 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, ccmakedep 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:
            ccmakedep -- $(CFLAGS) -- $(SRCS)
The program will ignore any option that it does not understand, so you may use
  the same arguments that you would for cc(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.
- -cccompiler
- Use this compiler to generate dependencies.
- -fmakefile
- Filename. This allows you to specify an alternate makefile in which
      ccmakedep 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 ccmakedep to look for in the makefile. The default is
      “# DO NOT DELETE”.
- -v
- Be verbose: display the C compiler command before running it.
- -- options --
- If ccmakedep 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,
      ccmakedep 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.
cc(1), make(1), makedepend(1), ccmakedep(1).
ccmakedep was written by the X Consortium.Colin Watson wrote this manual page, originally for the Debian
    Project, based partly on the manual page for makedepend(1).