gccmakedep(1) UNIX Programmer's Manual 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 describing 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 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 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 depend: gccmakedep -- $(CFLAGS) -- $(SRCS)
The program will ignore any option that it does not under- stand, 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 path. -a Append the dependencies to the file instead of replac- ing existing dependencies. -fmakefile 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. XFree86 Version 4.5.0 1 gccmakedep(1) UNIX Programmer's Manual gccmakedep(1) -sstring 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 follow- ing it will be silently ignored. A second double hyphen terminates this special treatment. In this way, gccmak- edep 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).
gccmakedep was 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 mak- edepend(1). XFree86 Version 4.5.0 2
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