1all: build-all 2# Dummy command so that make thinks it has done something 3 @true 4 5include ../../config-host.mak 6include $(SRC_PATH)/rules.mak 7 8$(call set-vpath, $(SRC_PATH)/pc-bios/optionrom) 9 10.PHONY : all clean build-all 11 12# Compiling with no optimization creates ROMs that are too large 13ifeq ($(lastword $(filter -O%, -O0 $(CFLAGS))),-O0) 14override CFLAGS += -O2 15endif 16 17# Drop -fstack-protector and the like 18QEMU_CFLAGS := $(filter -W%, $(QEMU_CFLAGS)) $(CFLAGS_NOPIE) -ffreestanding 19QEMU_CFLAGS += $(call cc-option, $(QEMU_CFLAGS), -fno-stack-protector) 20QEMU_CFLAGS += $(call cc-option, $(QEMU_CFLAGS), -m16) 21ifeq ($(filter -m16, $(QEMU_CFLAGS)),) 22# Attempt to work around compilers that lack -m16 (GCC <= 4.8, clang <= ??) 23# On GCC we add -fno-toplevel-reorder to keep the order of asm blocks with 24# respect to the rest of the code. clang does not have -fno-toplevel-reorder, 25# but it places all asm blocks at the beginning and we're relying on it for 26# the option ROM header. So just force clang not to use the integrated 27# assembler, which doesn't support .code16gcc. 28QEMU_CFLAGS += $(call cc-option, $(QEMU_CFLAGS), -fno-toplevel-reorder) 29QEMU_CFLAGS += $(call cc-option, $(QEMU_CFLAGS), -no-integrated-as) 30QEMU_CFLAGS += -m32 -include $(SRC_PATH)/pc-bios/optionrom/code16gcc.h 31endif 32 33QEMU_INCLUDES += -I$(SRC_PATH) 34 35Wa = -Wa, 36ASFLAGS += -32 37QEMU_CFLAGS += $(call cc-c-option, $(QEMU_CFLAGS), $(Wa)-32) 38 39build-all: multiboot.bin linuxboot.bin linuxboot_dma.bin kvmvapic.bin 40 41# suppress auto-removal of intermediate files 42.SECONDARY: 43 44 45%.o: %.S 46 $(call quiet-command,$(CPP) $(QEMU_INCLUDES) $(QEMU_DGFLAGS) -c -o - $< | $(AS) $(ASFLAGS) -o $@,"AS","$(TARGET_DIR)$@") 47 48%.img: %.o 49 $(call quiet-command,$(LD) $(LDFLAGS_NOPIE) -m $(LD_I386_EMULATION) -T $(SRC_PATH)/pc-bios/optionrom/flat.lds -s -o $@ $<,"BUILD","$(TARGET_DIR)$@") 50 51%.raw: %.img 52 $(call quiet-command,$(OBJCOPY) -O binary -j .text $< $@,"BUILD","$(TARGET_DIR)$@") 53 54%.bin: %.raw 55 $(call quiet-command,$(PYTHON) $(SRC_PATH)/scripts/signrom.py $< $@,"SIGN","$(TARGET_DIR)$@") 56 57clean: 58 rm -f *.o *.d *.raw *.img *.bin *~ 59