-CPPFLAGS = -DVERSION=\"${VERSION}\" -D_BSD_SOURCE
-CFLAGS = -std=c99 -pedantic -Wall -Os ${INCS} ${CPPFLAGS}
-LDFLAGS = -g ${LIBS}
+CPPFLAGS = -DVERSION=\"${VERSION}\" -DWEBEXTDIR=\"${LIBPREFIX}\" \
+ -D_DEFAULT_SOURCE -DGCR_API_SUBJECT_TO_CHANGE
+SURF_CFLAGS = $(INCS) $(CPPFLAGS) $(CFLAGS)
+SURF_LDFLAGS = $(LIBS) $(LDFLAGS)