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 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 doesnt find it, the program will append the string to the makefile and place the output after that.
SRCS = file1.c file2.c ... CFLAGS = -O -DHACK -I../foobar -xyz depend: gccmakedep -- $(CFLAGS) -- $(SRCS) |
Tag | Description |
---|---|
-a | Append the dependencies to the file instead of replacing existing dependencies. |
-fmakefile | |
Filename.
This allows you to specify an alternate makefile in which
gccmakedep can place its output.
Specifying - | |
-sstring | |
Starting string delimiter.
This option permits you to specify a different string for
gccmakedep to look for in the makefile.
The default is | |
-- 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. |
Normally, gccmakedep will be used in a makefile target so that typing 'make depend' will bring the dependencies up to date for the makefile.
Consider below make file:SRCS = HelloWorld.c HelloUniverse.c CFLAGS = -O -DHACK -I../foobar -xyz depend: gccmakedep -- $(CFLAGS) -- $(SRCS)
$ make depend gccmakedep -- -O -DHACK -I../foobar -xyz -- HelloWorld.c HelloUniverse.c SRCS = HelloWorld.c HelloUniverse.c CFLAGS = -O -DHACK -I../foobar -xyz depend: gccmakedep -- $(CFLAGS) -- $(SRCS) # DO NOT DELETE HelloWorld.o: HelloWorld.c /usr/include/stdio.h /usr/include/features.h \ /usr/include/sys/cdefs.h /usr/include/bits/wordsize.h \ /usr/include/gnu/stubs.h /usr/include/gnu/stubs-32.h \ /usr/lib/gcc/i386-redhat-linux/4.1.2/include/stddef.h \ /usr/include/bits/types.h /usr/include/bits/typesizes.h \ /usr/include/libio.h /usr/include/_G_config.h /usr/include/wchar.h \ /usr/include/bits/wchar.h /usr/include/gconv.h \ /usr/lib/gcc/i386-redhat-linux/4.1.2/include/stdarg.h \ /usr/include/bits/stdio_lim.h /usr/include/bits/sys_errlist.h HelloUniverse.o: HelloUniverse.c /usr/include/stdio.h \ /usr/include/features.h /usr/include/sys/cdefs.h \ /usr/include/bits/wordsize.h /usr/include/gnu/stubs.h \ /usr/include/gnu/stubs-32.h \ /usr/lib/gcc/i386-redhat-linux/4.1.2/include/stddef.h \ /usr/include/bits/types.h /usr/include/bits/typesizes.h \ /usr/include/libio.h /usr/include/_G_config.h /usr/include/wchar.h \ /usr/include/bits/wchar.h /usr/include/gconv.h \ /usr/lib/gcc/i386-redhat-linux/4.1.2/include/stdarg.h \ /usr/include/bits/stdio_lim.h /usr/include/bits/sys_errlist.h \ /usr/include/stdlib.h /usr/include/sys/types.h /usr/include/time.h \ /usr/include/endian.h /usr/include/bits/endian.h \ /usr/include/sys/select.h /usr/include/bits/select.h \ /usr/include/bits/sigset.h /usr/include/bits/time.h \ /usr/include/sys/sysmacros.h /usr/include/bits/pthreadtypes.h \ /usr/include/alloca.h