# %ifdef et al based on config.h settings or other %include'd files.
define preprocess-versions
sed 's/#.*$$//;s/^[ ]*%/#/' \
-| $(CC) -E -undef -traditional-cpp -I$(common-objdir) -I$(..)include \
+| $(CC) -E -undef -I$(common-objdir) -I$(..)include \
-include $(common-objpfx)config.h \
-x c - \
| sed 's/#.*$$//;/^[ ]*$$/d'