e57218b6ed
The various host OSes are irritatingly variable about the name of the linker emulation we need to pass to ld's -m option to build the i386 option ROMs. Instead of doing this via a CONFIG ifdef, check in configure whether any of the emulation names we know about will work and pass the right answer through to the makefile. If we can't find one, we fall back to not trying to build the option ROMs, in the same way we would for a non-x86 host platform. This is in particular necessary to unbreak the build on OpenBSD, since it wants a different answer to FreeBSD and we don't have an existing CONFIG_ variable that distinguishes the two. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Sean Bruno <sbruno@freebsd.org> Message-id: 1470672688-6754-1-git-send-email-peter.maydell@linaro.org
62 lines
2.1 KiB
Makefile
62 lines
2.1 KiB
Makefile
all: build-all
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# Dummy command so that make thinks it has done something
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@true
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include ../../config-host.mak
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include $(SRC_PATH)/rules.mak
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$(call set-vpath, $(SRC_PATH)/pc-bios/optionrom)
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.PHONY : all clean build-all
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# Compiling with no optimization creates ROMs that are too large
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ifeq ($(filter -O%, $(CFLAGS)),)
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override CFLAGS += -O2
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endif
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ifeq ($(filter -O%, $(CFLAGS)),-O0)
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override CFLAGS += -O2
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endif
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# Drop -fstack-protector and the like
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QEMU_CFLAGS := $(filter -W%, $(QEMU_CFLAGS)) $(CFLAGS_NOPIE) -ffreestanding
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QEMU_CFLAGS += $(call cc-option, $(QEMU_CFLAGS), -fno-stack-protector)
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QEMU_CFLAGS += $(call cc-option, $(QEMU_CFLAGS), -m16)
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ifeq ($(filter -m16, $(QEMU_CFLAGS)),)
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# Attempt to work around compilers that lack -m16 (GCC <= 4.8, clang <= ??)
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# On GCC we add -fno-toplevel-reorder to keep the order of asm blocks with
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# respect to the rest of the code. clang does not have -fno-toplevel-reorder,
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# but it places all asm blocks at the beginning and we're relying on it for
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# the option ROM header. So just force clang not to use the integrated
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# assembler, which doesn't support .code16gcc.
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QEMU_CFLAGS += $(call cc-option, $(QEMU_CFLAGS), -fno-toplevel-reorder)
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QEMU_CFLAGS += $(call cc-option, $(QEMU_CFLAGS), -no-integrated-as)
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QEMU_CFLAGS += -m32 -include $(SRC_PATH)/pc-bios/optionrom/code16gcc.h
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endif
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QEMU_INCLUDES += -I$(SRC_PATH)
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Wa = -Wa,
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ASFLAGS += -32
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QEMU_CFLAGS += $(call cc-c-option, $(QEMU_CFLAGS), $(Wa)-32)
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build-all: multiboot.bin linuxboot.bin linuxboot_dma.bin kvmvapic.bin
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# suppress auto-removal of intermediate files
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.SECONDARY:
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%.o: %.S
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$(call quiet-command,$(CPP) $(QEMU_INCLUDES) $(QEMU_DGFLAGS) -c -o - $< | $(AS) $(ASFLAGS) -o $@," AS $(TARGET_DIR)$@")
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%.img: %.o
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$(call quiet-command,$(LD) $(LDFLAGS_NOPIE) -m $(LD_I386_EMULATION) -T $(SRC_PATH)/pc-bios/optionrom/flat.lds -s -o $@ $<," Building $(TARGET_DIR)$@")
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%.raw: %.img
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$(call quiet-command,$(OBJCOPY) -O binary -j .text $< $@," Building $(TARGET_DIR)$@")
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%.bin: %.raw
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$(call quiet-command,$(PYTHON) $(SRC_PATH)/scripts/signrom.py $< $@," Signing $(TARGET_DIR)$@")
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clean:
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rm -f *.o *.d *.raw *.img *.bin *~
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