1include config.mak 2SRC_DIR := $(TOPSRC_DIR)/pc-bios/optionrom 3VPATH = $(SRC_DIR) 4 5all: multiboot.bin multiboot_dma.bin linuxboot.bin linuxboot_dma.bin kvmvapic.bin pvh.bin 6# Dummy command so that make thinks it has done something 7 @true 8 9CFLAGS = -O2 -g 10 11quiet-command = $(if $(V),$1,$(if $(2),@printf " %-7s %s\n" $2 $3 && $1, @$1)) 12cc-option = $(if $(shell $(CC) $1 -c -o /dev/null -xc /dev/null >/dev/null 2>&1 && echo OK), $1, $2) 13 14override CFLAGS += -march=i486 -Wall 15 16# If -fcf-protection is enabled in flags or compiler defaults that will 17# conflict with -march=i486 18override CFLAGS += $(call cc-option, -fcf-protection=none) 19 20# Flags for dependency generation 21override CPPFLAGS += -MMD -MP -MT $@ -MF $(@D)/$(*F).d 22 23override CFLAGS += $(filter -W%, $(QEMU_CFLAGS)) 24override CFLAGS += $(call cc-option, -fno-pie) 25override CFLAGS += -ffreestanding -I$(TOPSRC_DIR)/include 26override CFLAGS += $(call cc-option, -fno-stack-protector) 27override CFLAGS += $(call cc-option, -m16) 28override CFLAGS += $(call cc-option, -Wno-array-bounds) 29 30ifeq ($(filter -m16, $(CFLAGS)),) 31# Attempt to work around compilers that lack -m16 (GCC <= 4.8, clang <= ??) 32# On GCC we add -fno-toplevel-reorder to keep the order of asm blocks with 33# respect to the rest of the code. clang does not have -fno-toplevel-reorder, 34# but it places all asm blocks at the beginning and we're relying on it for 35# the option ROM header. So just force clang not to use the integrated 36# assembler, which doesn't support .code16gcc. 37override CFLAGS += $(call cc-option, -fno-toplevel-reorder) 38override CFLAGS += $(call cc-option, -no-integrated-as) 39override CFLAGS += -m32 -include $(SRC_DIR)/code16gcc.h 40endif 41 42Wa = -Wa, 43override ASFLAGS += -32 44override CFLAGS += $(call cc-option, $(Wa)-32) 45 46override LDFLAGS = -m $(LD_I386_EMULATION) -T $(SRC_DIR)/flat.lds 47 48pvh.img: pvh.o pvh_main.o 49 50%.o: %.S 51 $(call quiet-command,$(CC) $(CPPFLAGS) -E -o - $< | $(AS) $(ASFLAGS) -o $@,"AS","$@") 52 53%.o: %.c 54 $(call quiet-command,$(CC) $(CPPFLAGS) $(CFLAGS) -c $< -o $@,"CC","$@") 55 56%.img: %.o 57 $(call quiet-command,$(LD) $(LDFLAGS) -s -o $@ $^,"BUILD","$@") 58 59%.raw: %.img 60 $(call quiet-command,$(OBJCOPY) -O binary -j .text $< $@,"BUILD","$@") 61 62%.bin: %.raw 63 $(call quiet-command,$(PYTHON) $(TOPSRC_DIR)/scripts/signrom.py $< $@,"SIGN","$@") 64 65include $(wildcard *.d) 66 67clean: 68 rm -f *.o *.d *.raw *.img *.bin *~ 69 70# suppress auto-removal of intermediate files 71.SECONDARY: 72 73.PHONY: all clean 74