pc-bios/optionrom/Makefile

   1 all: build-all
   2 # Dummy command so that make thinks it has done something
   3         @true
   4
   5 include ../../config-host.mak
   6 include $(SRC_PATH)/rules.mak
   7
   8 $(call set-vpath, $(SRC_PATH)/pc-bios/optionrom)
   9
  10 .PHONY : all clean build-all
  11
  12 # Compiling with no optimization creates ROMs that are too large
  13 ifeq ($(lastword $(filter -O%, -O0 $(CFLAGS))),-O0)
  14 override CFLAGS += -O2
  15 endif
  16 override CFLAGS += -march=i486
  17
  18 # Drop -fstack-protector and the like
  19 QEMU_CFLAGS := $(filter -W%, $(QEMU_CFLAGS)) $(CFLAGS_NOPIE) -ffreestanding
  20 QEMU_CFLAGS += $(call cc-option, $(QEMU_CFLAGS), -fno-stack-protector)
  21 QEMU_CFLAGS += $(call cc-option, $(QEMU_CFLAGS), -m16)
  22 ifeq ($(filter -m16, $(QEMU_CFLAGS)),)
  23 # Attempt to work around compilers that lack -m16 (GCC <= 4.8, clang <= ??)
  24 # On GCC we add -fno-toplevel-reorder to keep the order of asm blocks with
  25 # respect to the rest of the code.  clang does not have -fno-toplevel-reorder,
  26 # but it places all asm blocks at the beginning and we're relying on it for
  27 # the option ROM header.  So just force clang not to use the integrated
  28 # assembler, which doesn't support .code16gcc.
  29 QEMU_CFLAGS += $(call cc-option, $(QEMU_CFLAGS), -fno-toplevel-reorder)
  30 QEMU_CFLAGS += $(call cc-option, $(QEMU_CFLAGS), -no-integrated-as)
  31 QEMU_CFLAGS += -m32 -include $(SRC_PATH)/pc-bios/optionrom/code16gcc.h
  32 endif
  33
  34 QEMU_INCLUDES += -I$(SRC_PATH)
  35
  36 Wa = -Wa,
  37 ASFLAGS += -32
  38 QEMU_CFLAGS += $(call cc-c-option, $(QEMU_CFLAGS), $(Wa)-32)
  39
  40 build-all: multiboot.bin linuxboot.bin linuxboot_dma.bin kvmvapic.bin
  41
  42 # suppress auto-removal of intermediate files
  43 .SECONDARY:
  44
  45
  46 %.o: %.S
  47         $(call quiet-command,$(CPP) $(QEMU_INCLUDES) $(QEMU_DGFLAGS) -c -o - $< | $(AS) $(ASFLAGS) -o $@,"AS","$(TARGET_DIR)$@")
  48
  49 %.img: %.o
  50         $(call quiet-command,$(LD) $(LDFLAGS_NOPIE) -m $(LD_I386_EMULATION) -T $(SRC_PATH)/pc-bios/optionrom/flat.lds -s -o $@ $<,"BUILD","$(TARGET_DIR)$@")
  51
  52 %.raw: %.img
  53         $(call quiet-command,$(OBJCOPY) -O binary -j .text $< $@,"BUILD","$(TARGET_DIR)$@")
  54
  55 %.bin: %.raw
  56         $(call quiet-command,$(PYTHON) $(SRC_PATH)/scripts/signrom.py $< $@,"SIGN","$(TARGET_DIR)$@")
  57
  58 clean:
  59         rm -f *.o *.d *.raw *.img *.bin *~