There is already $(CFLAGS-$@) to add extra flags for a particular target. This could easily be extended by adding $(CFLAGS-$(@D)) to add flags for all targets in a directory.
-- Andreas Schwab, SUSE Labs, sch...@suse.de GPG Key fingerprint = 0196 BAD8 1CE9 1970 F4BE 1748 E4D4 88E3 0EEA B9D7 "And now for something completely different."