grep '^Makefile\.am:1:.*CFLAGS' stderr
grep '^Makefile\.am:2:.*LDFLAGS' stderr
# No reason to warn about CXXFLAGS since it's not used.
grep '^Makefile\.am:1:.*CFLAGS' stderr
grep '^Makefile\.am:2:.*LDFLAGS' stderr
# No reason to warn about CXXFLAGS since it's not used.