pc-bios/optionrom/Makefile

   1 include config.mak
   2 SRC_DIR := $(TOPSRC_DIR)/pc-bios/optionrom
   3 VPATH = $(SRC_DIR)
   4
   5 all: 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
   9 CFLAGS = -O2 -g
  10
  11 quiet-command = $(if $(V),$1,$(if $(2),@printf "  %-7s %s\n" $2 $3 && $1, @$1))
  12 cc-option = $(if $(shell $(CC) $1 -c -o /dev/null -xc /dev/null >/dev/null 2>&1 && echo OK), $1, $2)
  13
  14 override CFLAGS += -march=i486 -Wall
  15
  16 # If -fcf-protection is enabled in flags or compiler defaults that will
  17 # conflict with -march=i486
  18 override CFLAGS += $(call cc-option, -fcf-protection=none)
  19
  20 # Flags for dependency generation
  21 override CPPFLAGS += -MMD -MP -MT $@ -MF $(@D)/$(*F).d
  22
  23 override CFLAGS += $(filter -W%, $(QEMU_CFLAGS))
  24 override CFLAGS += $(call cc-option, -fno-pie)
  25 override CFLAGS += -ffreestanding -I$(TOPSRC_DIR)/include
  26 override CFLAGS += $(call cc-option, -fno-stack-protector)
  27 override CFLAGS += $(call cc-option, -m16)
  28 override CFLAGS += $(call cc-option, -Wno-array-bounds)
  29
  30 ifeq ($(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.
  37 override CFLAGS += $(call cc-option, -fno-toplevel-reorder)
  38 override CFLAGS += $(call cc-option, -no-integrated-as)
  39 override CFLAGS += -m32 -include $(SRC_DIR)/code16gcc.h
  40 endif
  41
  42 Wa = -Wa,
  43 override ASFLAGS += -32
  44 override CFLAGS += $(call cc-option, $(Wa)-32)
  45
  46 override LDFLAGS = -m $(LD_I386_EMULATION) -T $(SRC_DIR)/flat.lds
  47
  48 pvh.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
  65 include $(wildcard *.d)
  66
  67 clean:
  68         rm -f *.o *.d *.raw *.img *.bin *~
  69
  70 # suppress auto-removal of intermediate files
  71 .SECONDARY:
  72
  73 .PHONY: all clean