gccmakedep man page on aLinux

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gccmakedep(1)							 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 describ‐
       ing  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	begin‐
       ning with


       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 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

       -a     Append the dependencies to the file instead of replacing	exist‐
	      ing 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.

	      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  spe‐
	      cial  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.

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

       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 1.0.2			 gccmakedep(1)

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