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ccmakedep - create dependencies in makefiles using a C compiler
[ cpp-flags ] [ -wwidth ] [ -smagic-string ] [ -fmakefile ] [ -oobject-suffix
] [ -v ] [ -a ] [ -cccompiler ] [ -- options -- ] sourcefile ...
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
# 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
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.
was written by the X Consortium.
- Append the dependencies to the file instead of replacing existing dependencies.
- Use this compiler to generate dependencies.
This allows you to specify an alternate makefile in which ccmakedep can
place its output. Specifying lq-rq 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 ccmakedep to look for in the makefile. The default is lq# DO
- Be verbose: display the C compiler command before running
- -- 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
Colin Watson wrote this manual page, originally
for the Debian Project, based partly on the manual page for makedepend(1)
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