Apparently pre 5.1 gcc defaulted to gnu89, but we decided it was ok to
use some c99 features.
'-std=c99' by itself is not enough for notmuch to compile.
'-std=gnu99' seems to work with clang and gcc, so I'm not convinced
configuration support is needed.
PV_FILE=bindings/python/notmuch/version.py
# Smash together user's values with our extra values
-FINAL_CFLAGS = -DNOTMUCH_VERSION=$(VERSION) $(CPPFLAGS) $(CFLAGS) $(WARN_CFLAGS) $(extra_cflags) $(CONFIGURE_CFLAGS)
+STD_CFLAGS := -std=gnu99
+FINAL_CFLAGS = -DNOTMUCH_VERSION=$(VERSION) $(CPPFLAGS) $(STD_CFLAGS) $(CFLAGS) $(WARN_CFLAGS) $(extra_cflags) $(CONFIGURE_CFLAGS)
FINAL_CXXFLAGS = $(CPPFLAGS) $(CXXFLAGS) $(WARN_CXXFLAGS) $(extra_cflags) $(extra_cxxflags) $(CONFIGURE_CXXFLAGS)
FINAL_NOTMUCH_LDFLAGS = $(LDFLAGS) -Lutil -lutil -Llib -lnotmuch
ifeq ($(LIBDIR_IN_LDCONFIG),0)