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 9include ../../config-host.mak 10CFLAGS = -O2 -g 11 12quiet-command = $(if $(V),$1,$(if $(2),@printf " %-7s %s\n" $2 $3 && $1, @$1)) 13cc-option = $(if $(shell $(CC) $1 -c -o /dev/null -xc /dev/null >/dev/null 2>&1 && echo OK), $1, $2) 14 15override CFLAGS += -march=i486 -Wall 16 17# If -fcf-protection is enabled in flags or compiler defaults that will 18# conflict with -march=i486 19override CFLAGS += $(call cc-option, -fcf-protection=none) 20 21# Flags for dependency generation 22override CPPFLAGS += -MMD -MP -MT $@ -MF $(@D)/$(*F).d 23 24override CFLAGS += $(filter -W%, $(QEMU_CFLAGS)) 25override CFLAGS += $(call cc-option, -fno-pie) 26override CFLAGS += -ffreestanding -I$(TOPSRC_DIR)/include 27override CFLAGS += $(call cc-option, -fno-stack-protector) 28override CFLAGS += $(call cc-option, -m16) 29 30ifeq ($(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 46LD_I386_EMULATION ?= elf_i386 47override LDFLAGS = -m $(LD_I386_EMULATION) -T $(SRC_DIR)/flat.lds 48 49pvh.img: pvh.o pvh_main.o 50 51%.o: %.S 52 $(call quiet-command,$(CPP) $(CPPFLAGS) -c -o - $< | $(AS) $(ASFLAGS) -o $@,"AS","$@") 53 54%.o: %.c 55 $(call quiet-command,$(CC) $(CPPFLAGS) $(CFLAGS) -c $< -o $@,"CC","$@") 56 57%.img: %.o 58 $(call quiet-command,$(LD) $(LDFLAGS) -s -o $@ $^,"BUILD","$@") 59 60%.raw: %.img 61 $(call quiet-command,$(OBJCOPY) -O binary -j .text $< $@,"BUILD","$@") 62 63%.bin: %.raw 64 $(call quiet-command,$(PYTHON) $(TOPSRC_DIR)/scripts/signrom.py $< $@,"SIGN","$@") 65 66include $(wildcard *.d) 67 68clean: 69 rm -f *.o *.d *.raw *.img *.bin *~ 70 71# suppress auto-removal of intermediate files 72.SECONDARY: 73 74.PHONY: all clean 75