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MKDEPEND(1)							   MKDEPEND(1)

NAME    [Toc]    [Back]

     mkdepend -	compute	header file dependencies

SYNOPSIS    [Toc]    [Back]

     mkdepend [-c compiler] [-e	sedprog] [-f force] [-i] [-p count] [-r] [-s
     sentinel] depfile [file ...]

DESCRIPTION    [Toc]    [Back]

     Mkdepend infers make(1) dependencies from source containing C #include
     directives.  It invokes cc(1) with	the -M option to compile dependencies
     given a list of source files, and edits the generated dependency
     information into depfile, which may be a makefile or a make include file.

     The -c option substitutes compiler, which may be an elaborate, quoted
     invocation	of a compiler, for the default cc -M.  This option is useful
     in	an environment where the -D and	-I options of cc are used to govern
     header file inclusion.

     The -e option passes an editing program to	sed(1),	which is applied to
     raw dependency information	of the following form:

	  object: source

     Thus one may substitute pathname prefixes with envariable parameters, or
     rewrite the conventional .o object	suffix.

     The -f option causes mkdepend to add a dependent named force to each
     target file's dependency list.  Using -f '$(FORCE)' and setting
     FORCE=FORCE in a make's environment, one may rebuild certain objects
     without first removing them.  This	example	assumes	that no	file named
     FORCE exists in any of make's current working directories.

     Normally, existing	dependencies are deleted from the makefile.  The -i
     option causes mkdepend to preserve	old dependencies, replacing only those
     involving targets based on	the file arguments.  The following rule
     incrementally updates a dependency	file named Makedepend:

	  Makedepend: $(CFILES)
	       mkdepend	-c "$(CC) $(CFLAGS) -M"	-i $@ $?

     The -r option causes mkdepend to read raw dependencies from its file
     arguments,	or from	standard input if no file arguments are	given.	The -p
     option is like -r,	but also collapses dependencies	of targets in
     subdirectories where possible.  The count argument	specifies the number
     of	subdirectories.	 For example,

	  subdir1/object: source
	  subdir2/object: source
	  subdir3/object: source

									Page 1

MKDEPEND(1)							   MKDEPEND(1)

     would be rewritten	by mkdepend -p 3 as

	  object: source

     -p	is useful in conjunction with make's VPATH variable.

     The -c, -p, and -r	options	override one another.

     The -s option inserts its sentinel	argument in the	comment	lines which
     delimit dependencies in depfile.  This option is useful for maintaining
     multiple sets of dependencies in a	single file.

NOTES    [Toc]    [Back]

     This command will be removed from the next	major release.	Use cc
     -MDupdate instead.

SEE ALSO    [Toc]    [Back]

     cc(1), cpp(1), make(1), sed(1)

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