pc-bios/optionrom/Makefile

   1 CURRENT_MAKEFILE := $(realpath $(word $(words $(MAKEFILE_LIST)),$(MAKEFILE_LIST)))
   2 SRC_DIR := $(dir $(CURRENT_MAKEFILE))
   3 TOPSRC_DIR := $(SRC_DIR)/../..
   4 VPATH = $(SRC_DIR)
   5
   6 all: multiboot.bin linuxboot.bin linuxboot_dma.bin kvmvapic.bin pvh.bin
   7 # Dummy command so that make thinks it has done something
   8         @true
   9
  10 include ../../config-host.mak
  11 CFLAGS = -O2 -g
  12
  13 quiet-command = $(if $(V),$1,$(if $(2),@printf "  %-7s %s\n" $2 $3 && $1, @$1))
  14 cc-option = $(if $(shell $(CC) $1 -c -o /dev/null -xc /dev/null >/dev/null 2>&1 && echo OK), $1, $2)
  15
  16 override CFLAGS += -march=i486 -Wall
  17
  18 # Flags for dependency generation
  19 override CPPFLAGS += -MMD -MP -MT $@ -MF $(@D)/$(*F).d
  20
  21 override CFLAGS += $(filter -W%, $(QEMU_CFLAGS))
  22 override CFLAGS += $(CFLAGS_NOPIE) -ffreestanding -I$(TOPSRC_DIR)/include
  23 override CFLAGS += $(call cc-option, -fno-stack-protector)
  24 override CFLAGS += $(call cc-option, -m16)
  25
  26 ifeq ($(filter -m16, $(CFLAGS)),)
  27 # Attempt to work around compilers that lack -m16 (GCC <= 4.8, clang <= ??)
  28 # On GCC we add -fno-toplevel-reorder to keep the order of asm blocks with
  29 # respect to the rest of the code.  clang does not have -fno-toplevel-reorder,
  30 # but it places all asm blocks at the beginning and we're relying on it for
  31 # the option ROM header.  So just force clang not to use the integrated
  32 # assembler, which doesn't support .code16gcc.
  33 override CFLAGS += $(call cc-option, -fno-toplevel-reorder)
  34 override CFLAGS += $(call cc-option, -no-integrated-as)
  35 override CFLAGS += -m32 -include $(SRC_DIR)/code16gcc.h
  36 endif
  37
  38 Wa = -Wa,
  39 override ASFLAGS += -32
  40 override CFLAGS += $(call cc-option, $(Wa)-32)
  41
  42 LD_I386_EMULATION ?= elf_i386
  43 override LDFLAGS = -m $(LD_I386_EMULATION) -T $(SRC_DIR)/flat.lds
  44
  45 all: multiboot.bin linuxboot.bin linuxboot_dma.bin kvmvapic.bin pvh.bin
  46
  47 pvh.img: pvh.o pvh_main.o
  48
  49 %.o: %.S
  50         $(call quiet-command,$(CPP) $(CPPFLAGS) -c -o - $< | $(AS) $(ASFLAGS) -o $@,"AS","$@")
  51
  52 %.o: %.c
  53         $(call quiet-command,$(CC) $(CPPFLAGS) $(CFLAGS) -c $< -o $@,"CC","$@")
  54
  55 %.img: %.o
  56         $(call quiet-command,$(LD) $(LDFLAGS) -s -o $@ $^,"BUILD","$@")
  57
  58 %.raw: %.img
  59         $(call quiet-command,$(OBJCOPY) -O binary -j .text $< $@,"BUILD","$@")
  60
  61 %.bin: %.raw
  62         $(call quiet-command,$(PYTHON) $(TOPSRC_DIR)/scripts/signrom.py $< $@,"SIGN","$@")
  63
  64 include $(wildcard *.d)
  65
  66 clean:
  67         rm -f *.o *.d *.raw *.img *.bin *~
  68
  69 # suppress auto-removal of intermediate files
  70 .SECONDARY:
  71
  72 .PHONY: all clean