optionrom: build with discrete CPP and AS steps
Build option ROM .S files with separate preprocessor and
assembler steps because the C compiler could be unsuitable.
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
diff --git a/rules.mak b/rules.mak
index 8448b94..fe0c881 100644
--- a/rules.mak
+++ b/rules.mak
@@ -28,8 +28,11 @@
$(call quiet-command,$(LIBTOOL) --mode=compile --quiet --tag=CC $(CC) $(QEMU_INCLUDES) $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) -c -o $@ $<," lt CC $@")
endif
-%.o: %.S
- $(call quiet-command,$(CC) $(QEMU_INCLUDES) $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) -c -o $@ $<," AS $(TARGET_DIR)$@")
+%.asm: %.S
+ $(call quiet-command,$(CPP) $(QEMU_INCLUDES) $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) -o $@ $<," CPP $(TARGET_DIR)$@")
+
+%.o: %.asm
+ $(call quiet-command,$(AS) $(ASFLAGS) -o $@ $<," AS $(TARGET_DIR)$@")
%.o: %.m
$(call quiet-command,$(OBJCC) $(QEMU_INCLUDES) $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) -c -o $@ $<," OBJC $(TARGET_DIR)$@")