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
  12 quiet-command = $(if $(V),$1,$(if $(2),@printf "  %-7s %s\n" $2 $3 && $1, @$1))
  13 cc-option = $(if $(shell $(CC) $1 -S -o /dev/null -xc /dev/null >/dev/null 2>&1 && echo OK), $1, $2)
  14
  15 # Compiling with no optimization creates ROMs that are too large
  16 ifeq ($(lastword $(filter -O%, -O0 $(CFLAGS))),-O0)
  17 override CFLAGS += -O2
  18 endif
  19 override CFLAGS += -march=i486
  20
  21 # Flags for dependency generation
  22 override CPPFLAGS += -MMD -MP -MT $@ -MF $(@D)/$(*F).d
  23
  24 override CFLAGS += $(filter -W%, $(QEMU_CFLAGS))
  25 override CFLAGS += $(CFLAGS_NOPIE) -ffreestanding -I$(TOPSRC_DIR)/include
  26 override CFLAGS += $(call cc-option, -fno-stack-protector)
  27 override CFLAGS += $(call cc-option, -m16)
  28
  29 ifeq ($(filter -m16, $(CFLAGS)),)
  30 # Attempt to work around compilers that lack -m16 (GCC <= 4.8, clang <= ??)
  31 # On GCC we add -fno-toplevel-reorder to keep the order of asm blocks with
  32 # respect to the rest of the code.  clang does not have -fno-toplevel-reorder,
  33 # but it places all asm blocks at the beginning and we're relying on it for
  34 # the option ROM header.  So just force clang not to use the integrated
  35 # assembler, which doesn't support .code16gcc.
  36 override CFLAGS += $(call cc-option, -fno-toplevel-reorder)
  37 override CFLAGS += $(call cc-option, -no-integrated-as)
  38 override CFLAGS += -m32 -include $(SRC_DIR)/code16gcc.h
  39 endif
  40
  41 Wa = -Wa,
  42 override ASFLAGS += -32
  43 override CFLAGS += $(call cc-option, $(Wa)-32)
  44
  45
  46 LD_I386_EMULATION ?= elf_i386
  47 override LDFLAGS = -m $(LD_I386_EMULATION) -T $(SRC_DIR)/flat.lds
  48 override LDFLAGS += $(LDFLAGS_NOPIE)
  49
  50 all: multiboot.bin linuxboot.bin linuxboot_dma.bin kvmvapic.bin pvh.bin
  51
  52 pvh.img: pvh.o pvh_main.o
  53
  54 %.o: %.S
  55         $(call quiet-command,$(CPP) $(CPPFLAGS) -c -o - $< | $(AS) $(ASFLAGS) -o $@,"AS","$@")
  56
  57 %.o: %.c
  58         $(call quiet-command,$(CC) $(CPPFLAGS) $(CFLAGS) -c $< -o $@,"CC","$@")
  59
  60 %.img: %.o
  61         $(call quiet-command,$(LD) $(LDFLAGS) -s -o $@ $^,"BUILD","$@")
  62
  63 %.raw: %.img
  64         $(call quiet-command,$(OBJCOPY) -O binary -j .text $< $@,"BUILD","$@")
  65
  66 %.bin: %.raw
  67         $(call quiet-command,$(PYTHON) $(TOPSRC_DIR)/scripts/signrom.py $< $@,"SIGN","$@")
  68
  69 include $(wildcard *.d)
  70
  71 clean:
  72         rm -f *.o *.d *.raw *.img *.bin *~
  73
  74 # suppress auto-removal of intermediate files
  75 .SECONDARY:
  76
  77 .PHONY: all clean