- $(Q) m4 -I $(m4_ggo_dir) --debug=i $< 3>&1 1>/dev/null 2>&3 \
- | awk '{if ($$0 ~ "^m4debug: input read from ") \
- print "$(ggo_dir)/$(*F).ggo: " $$NF}' > $@
+ $(Q) $(M4) -I $(m4_ggo_dir) -s $< \
+ | awk '{if ($$1 ~ /#line/) {gsub(/"/, "", $$3); if ($$3 != "$<") \
+ print "$(ggo_dir)/$(*F).ggo: " $$3}}' | sort | uniq > $@