include config.mak SRC_DIR := $(TOPSRC_DIR)/pc-bios/optionrom VPATH = $(SRC_DIR) all: multiboot.bin multiboot_dma.bin linuxboot.bin linuxboot_dma.bin kvmvapic.bin pvh.bin # Dummy command so that make thinks it has done something @true include ../../config-host.mak CFLAGS = -O2 -g quiet-command = $(if $(V),$1,$(if $(2),@printf " %-7s %s\n" $2 $3 && $1, @$1)) cc-option = $(if $(shell $(CC) $1 -c -o /dev/null -xc /dev/null >/dev/null 2>&1 && echo OK), $1, $2) override CFLAGS += -march=i486 -Wall # If -fcf-protection is enabled in flags or compiler defaults that will # conflict with -march=i486 override CFLAGS += $(call cc-option, -fcf-protection=none) # Flags for dependency generation override CPPFLAGS += -MMD -MP -MT $@ -MF $(@D)/$(*F).d override CFLAGS += $(filter -W%, $(QEMU_CFLAGS)) override CFLAGS += $(call cc-option, -fno-pie) override CFLAGS += -ffreestanding -I$(TOPSRC_DIR)/include override CFLAGS += $(call cc-option, -fno-stack-protector) override CFLAGS += $(call cc-option, -m16) override CFLAGS += $(call cc-option, -Wno-array-bounds) ifeq ($(filter -m16, $(CFLAGS)),) # Attempt to work around compilers that lack -m16 (GCC <= 4.8, clang <= ??) # On GCC we add -fno-toplevel-reorder to keep the order of asm blocks with # respect to the rest of the code. clang does not have -fno-toplevel-reorder, # but it places all asm blocks at the beginning and we're relying on it for # the option ROM header. So just force clang not to use the integrated # assembler, which doesn't support .code16gcc. override CFLAGS += $(call cc-option, -fno-toplevel-reorder) override CFLAGS += $(call cc-option, -no-integrated-as) override CFLAGS += -m32 -include $(SRC_DIR)/code16gcc.h endif Wa = -Wa, override ASFLAGS += -32 override CFLAGS += $(call cc-option, $(Wa)-32) LD_I386_EMULATION ?= elf_i386 override LDFLAGS = -m $(LD_I386_EMULATION) -T $(SRC_DIR)/flat.lds pvh.img: pvh.o pvh_main.o %.o: %.S $(call quiet-command,$(CPP) $(CPPFLAGS) -c -o - $< | $(AS) $(ASFLAGS) -o $@,"AS","$@") %.o: %.c $(call quiet-command,$(CC) $(CPPFLAGS) $(CFLAGS) -c $< -o $@,"CC","$@") %.img: %.o $(call quiet-command,$(LD) $(LDFLAGS) -s -o $@ $^,"BUILD","$@") %.raw: %.img $(call quiet-command,$(OBJCOPY) -O binary -j .text $< $@,"BUILD","$@") %.bin: %.raw $(call quiet-command,$(PYTHON) $(TOPSRC_DIR)/scripts/signrom.py $< $@,"SIGN","$@") include $(wildcard *.d) clean: rm -f *.o *.d *.raw *.img *.bin *~ # suppress auto-removal of intermediate files .SECONDARY: .PHONY: all clean