proto.h

[Martin Pool]

(Please cc me on replies.)

After borrowing tridge's mkproto.awk script for n4, I put in these
Makefile rules, which mean that prototype.h is rebuilt every time, but
it does not in turn require everything else to be rebuilt.  This seems
like a good tradeoff: only changed sources are rebuilt, but errors in
prototypes are caught earlier.

proto: prototype.h

.proto.stamp: prototype.h
	@[ -f $@ ] || touch $@

prototype.h: script/mkproto.awk $(MKPROTO_C)
	@echo Checking prototype.h
	@cd $(srcdir) && $(AWK) -f script/mkproto.awk $(MKPROTO_C) \
		>prototype.h.new
	@if test -f prototype.h && cmp -s prototype.h.new prototype.h; \
	then rm -f prototype.h.new; \
	echo No changes to prototypes; \
	else \
	echo Installing new prototype.h; \
	mv prototype.h.new prototype.h; \
	fi

$(ALL_OBJ): .proto.stamp config.h

-- 
Martin 
VA Linux Systems                        GnuPG encrypted email preferred