gccmakedep - create dependencies in makefiles using 'gcc -M'
] [ -fmakefile
] [ -- options
-- ] sourcefile
program calls 'gcc -M' to output makefile
describing the dependencies of each sourcefile
, so that make
knows which object files must be recompiled when a dependency has changed.
By default, gccmakedep
places its output in the file named
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
will be used in a makefile target so that typing
'make depend' will bring the dependencies up to date for the makefile. For
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
options to define and undefine symbols and -I
to set the
- Append the dependencies to the file instead of replacing
- 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 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.
The version of the gccmakedep
included in this X.Org Foundation release
was originally written by the XFree86 Project based on code supplied by
Colin Watson wrote this manual page, originally for the Debian Project, based
partly on the manual page for makedepend