optionrom: simplify Makefile
Make it independent from the rules.mak, and clean up to use pattern rules. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Marc-André Lureau
Paolo Bonzini
parent
77afc75f69
commit
bf708f3c4a
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@ -1,13 +1,16 @@
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all: build-all
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CURRENT_MAKEFILE := $(realpath $(word $(words $(MAKEFILE_LIST)),$(MAKEFILE_LIST)))
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SRC_DIR := $(dir $(CURRENT_MAKEFILE))
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TOPSRC_DIR := $(SRC_DIR)/../..
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VPATH = $(SRC_DIR)
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all: multiboot.bin linuxboot.bin linuxboot_dma.bin kvmvapic.bin pvh.bin
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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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quiet-command = $(if $(V),$1,$(if $(2),@printf " %-7s %s\n" $2 $3 && $1, @$1))
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cc-option = $(if $(shell $(CC) $1 -S -o /dev/null -xc /dev/null >/dev/null 2>&1 && echo OK), $1, $2)
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# Compiling with no optimization creates ROMs that are too large
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ifeq ($(lastword $(filter -O%, -O0 $(CFLAGS))),-O0)
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@ -15,48 +18,60 @@ override CFLAGS += -O2
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endif
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override CFLAGS += -march=i486
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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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# Flags for dependency generation
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override CPPFLAGS += -MMD -MP -MT $@ -MF $(@D)/$(*F).d
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override CFLAGS += $(filter -W%, $(QEMU_CFLAGS))
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override CFLAGS += $(CFLAGS_NOPIE) -ffreestanding -I$(TOPSRC_DIR)/include
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override CFLAGS += $(call cc-option, -fno-stack-protector)
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override CFLAGS += $(call cc-option, -m16)
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ifeq ($(filter -m16, $(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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override CFLAGS += $(call cc-option, -fno-toplevel-reorder)
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override CFLAGS += $(call cc-option, -no-integrated-as)
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override CFLAGS += -m32 -include $(SRC_DIR)/code16gcc.h
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endif
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QEMU_INCLUDES += -I$(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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override ASFLAGS += -32
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override CFLAGS += $(call cc-option, $(Wa)-32)
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build-all: multiboot.bin linuxboot.bin linuxboot_dma.bin kvmvapic.bin pvh.bin
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LD_I386_EMULATION ?= elf_i386
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override LDFLAGS = -m $(LD_I386_EMULATION) -T $(SRC_DIR)/flat.lds
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override LDFLAGS += $(LDFLAGS_NOPIE)
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all: multiboot.bin linuxboot.bin linuxboot_dma.bin kvmvapic.bin pvh.bin
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pvh.img: pvh.o pvh_main.o
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%.o: %.S
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$(call quiet-command,$(CPP) $(CPPFLAGS) -c -o - $< | $(AS) $(ASFLAGS) -o $@,"AS","$@")
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%.o: %.c
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$(call quiet-command,$(CC) $(CPPFLAGS) $(CFLAGS) -c $< -o $@,"CC","$@")
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%.img: %.o
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$(call quiet-command,$(LD) $(LDFLAGS) -s -o $@ $^,"BUILD","$@")
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%.raw: %.img
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$(call quiet-command,$(OBJCOPY) -O binary -j .text $< $@,"BUILD","$@")
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%.bin: %.raw
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$(call quiet-command,$(PYTHON) $(TOPSRC_DIR)/scripts/signrom.py $< $@,"SIGN","$@")
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include $(wildcard *.d)
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clean:
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rm -f *.o *.d *.raw *.img *.bin *~
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# suppress auto-removal of intermediate files
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.SECONDARY:
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%.o: %.S
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$(call quiet-command,$(CPP) $(QEMU_INCLUDES) $(QEMU_DGFLAGS) -c -o - $< | $(AS) $(ASFLAGS) -o $@,"AS","$(TARGET_DIR)$@")
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pvh.img: pvh.o pvh_main.o
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$(call quiet-command,$(LD) $(LDFLAGS_NOPIE) -m $(LD_I386_EMULATION) -T $(SRC_PATH)/pc-bios/optionrom/flat.lds -s -o $@ $^,"BUILD","$(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 $@ $<,"BUILD","$(TARGET_DIR)$@")
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%.raw: %.img
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$(call quiet-command,$(OBJCOPY) -O binary -j .text $< $@,"BUILD","$(TARGET_DIR)$@")
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%.bin: %.raw
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$(call quiet-command,$(PYTHON) $(SRC_PATH)/scripts/signrom.py $< $@,"SIGN","$(TARGET_DIR)$@")
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clean:
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rm -f *.o *.d *.raw *.img *.bin *~
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.PHONY: all clean
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