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 include ../../config-host.mak
  10 CFLAGS = -O2 -g
  11
  12 quiet-command = $(if $(V),$1,$(if $(2),@printf "  %-7s %s\n" $2 $3 && $1, @$1))
  13 cc-option = $(if $(shell $(CC) $1 -c -o /dev/null -xc /dev/null >/dev/null 2>&1 && echo OK), $1, $2)
  14
  15 override CFLAGS += -march=i486 -Wall
  16
  17 # Flags for dependency generation
  18 override CPPFLAGS += -MMD -MP -MT $@ -MF $(@D)/$(*F).d
  19
  20 override CFLAGS += $(filter -W%, $(QEMU_CFLAGS))
  21 override CFLAGS += $(CFLAGS_NOPIE) -ffreestanding -I$(TOPSRC_DIR)/include
  22 override CFLAGS += $(call cc-option, -fno-stack-protector)
  23 override CFLAGS += $(call cc-option, -m16)
  24
  25 ifeq ($(filter -m16, $(CFLAGS)),)
  26 # Attempt to work around compilers that lack -m16 (GCC <= 4.8, clang <= ??)
  27 # On GCC we add -fno-toplevel-reorder to keep the order of asm blocks with
  28 # respect to the rest of the code.  clang does not have -fno-toplevel-reorder,
  29 # but it places all asm blocks at the beginning and we're relying on it for
  30 # the option ROM header.  So just force clang not to use the integrated
  31 # assembler, which doesn't support .code16gcc.
  32 override CFLAGS += $(call cc-option, -fno-toplevel-reorder)
  33 override CFLAGS += $(call cc-option, -no-integrated-as)
  34 override CFLAGS += -m32 -include $(SRC_DIR)/code16gcc.h
  35 endif
  36
  37 Wa = -Wa,
  38 override ASFLAGS += -32
  39 override CFLAGS += $(call cc-option, $(Wa)-32)
  40
  41 LD_I386_EMULATION ?= elf_i386
  42 override LDFLAGS = -m $(LD_I386_EMULATION) -T $(SRC_DIR)/flat.lds
  43
  44 pvh.img: pvh.o pvh_main.o
  45
  46 %.o: %.S
  47         $(call quiet-command,$(CPP) $(CPPFLAGS) -c -o - $< | $(AS) $(ASFLAGS) -o $@,"AS","$@")
  48
  49 %.o: %.c
  50         $(call quiet-command,$(CC) $(CPPFLAGS) $(CFLAGS) -c $< -o $@,"CC","$@")
  51
  52 %.img: %.o
  53         $(call quiet-command,$(LD) $(LDFLAGS) -s -o $@ $^,"BUILD","$@")
  54
  55 %.raw: %.img
  56         $(call quiet-command,$(OBJCOPY) -O binary -j .text $< $@,"BUILD","$@")
  57
  58 %.bin: %.raw
  59         $(call quiet-command,$(PYTHON) $(TOPSRC_DIR)/scripts/signrom.py $< $@,"SIGN","$@")
  60
  61 include $(wildcard *.d)
  62
  63 clean:
  64         rm -f *.o *.d *.raw *.img *.bin *~
  65
  66 # suppress auto-removal of intermediate files
  67 .SECONDARY:
  68
  69 .PHONY: all clean