Makefile, header dependencies

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If you are using a GNU compiler, the compiler can assemble a list of dependencies for you. Makefile fragment:

depend: .depend

.depend: $(SRCS)
        rm -f "$@"
        $(CC) $(CFLAGS) -MM $^ -MF "$@"

include .depend

or

depend: .depend

.depend: $(SRCS)
        rm -f "$@"
        $(CC) $(CFLAGS) -MM $^ > "$@"

include .depend

where SRCS is a variable pointing to your entire list of source files.

There is also the tool makedepend, but I never liked it as much as gcc -MM

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