The issue is that the bison rule says it creates a %.output file, but doesn't actually do that.
%.tab.c %.tab.h %.output: %.y
@$(VECHO) BISON $@
$(BISON) -b $(basename $(basename $@)) -d $<
Note that no target actually depends on any *.output file.
--
Andreas Schwab, SUSE Labs, sch...@suse.de
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"And now for something completely different."
