test: append $(CFLAGS_add), which includes fno-builtin

test/Makefile

@@ -14,22 +14,22 @@ all: test-double test-float # test-double-system test-float-system
 bench: bench-syslibm bench-openlibm
 
 test-double: test-double.c libm-test.c libm-test-ulps.h
-	$(CC) $(CPPFLAGS) $(CFLAGS) $(CFLAGS_arch) $(LDFLAGS) $(LDFLAGS_arch) [email protected] -D__BSD_VISIBLE -I ../include -I../src $(OPENLIBM_LIB) -o $@
+	$(CC) $(CPPFLAGS) $(CFLAGS) $(CFLAGS_add) $(LDFLAGS) $(LDFLAGS_arch) [email protected] -D__BSD_VISIBLE -I ../include -I../src $(OPENLIBM_LIB) -o $@
 
 test-float: test-float.c libm-test.c libm-test-ulps.h
-	$(CC) $(CPPFLAGS) $(CFLAGS) $(CFLAGS_arch) $(LDFLAGS) $(LDFLAGS_arch) [email protected] -D__BSD_VISIBLE -I ../include -I../src $(OPENLIBM_LIB) -o $@
+	$(CC) $(CPPFLAGS) $(CFLAGS) $(CFLAGS_add) $(LDFLAGS) $(LDFLAGS_arch) [email protected] -D__BSD_VISIBLE -I ../include -I../src $(OPENLIBM_LIB) -o $@
 
 test-double-system: test-double.c libm-test.c libm-test-ulps.h
-	$(CC) $(CPPFLAGS) $(CFLAGS) $(CFLAGS_arch) $(LDFLAGS) $(LDFLAGS_arch) $< -DSYS_MATH_H -lm -o $@
+	$(CC) $(CPPFLAGS) $(CFLAGS) $(CFLAGS_add) $(LDFLAGS) $(LDFLAGS_arch) $< -DSYS_MATH_H -lm -o $@
 
 test-float-system: test-float.c libm-test.c libm-test-ulps.h
-	$(CC) $(CPPFLAGS) $(CFLAGS) $(CFLAGS_arch) $(LDFLAGS) $(LDFLAGS_arch) $< -DSYS_MATH_H -lm -o $@
+	$(CC) $(CPPFLAGS) $(CFLAGS) $(CFLAGS_add) $(LDFLAGS) $(LDFLAGS_arch) $< -DSYS_MATH_H -lm -o $@
 
 bench-openlibm: libm-bench.cpp
-	$(CC) $(CPPFLAGS) $(CFLAGS) $(CFLAGS_arch) $(LDFLAGS) $(LDFLAGS_arch) $< $(OPENLIBM_LIB) -o $@
+	$(CC) $(CPPFLAGS) $(CFLAGS) $(CFLAGS_add) $(LDFLAGS) $(LDFLAGS_arch) $< $(OPENLIBM_LIB) -o $@
 
 bench-syslibm: libm-bench.cpp
-	$(CC) $(CPPFLAGS) $(CFLAGS) $(CFLAGS_arch) $(LDFLAGS) $(LDFLAGS_arch) $< -lm -o $@
+	$(CC) $(CPPFLAGS) $(CFLAGS) $(CFLAGS_add) $(LDFLAGS) $(LDFLAGS_arch) $< -lm -o $@
 
 clean:
 	rm -fr test-double test-float test-double-system test-float-system bench-openlibm bench-syslibm *.dSYM