pc-bios/optionrom/Makefile

   1 all: build-all
   2
   3 include ../../config-host.mak
   4
   5 VPATH=$(SRC_PATH)/pc-bios/optionrom
   6
   7 # from kernel sources - scripts/Kbuild.include
   8 # try-run
   9 # Usage: option = $(call try-run, $(CC)...-o "$$TMP",option-ok,otherwise)
  10 # Exit code chooses option. "$$TMP" is can be used as temporary file and
  11 # is automatically cleaned up.
  12 try-run = $(shell set -e;               \
  13         TMP="$(TMPOUT).$$$$.tmp";       \
  14         if ($(1)) >/dev/null 2>&1;      \
  15         then echo "$(2)";               \
  16         else echo "$(3)";               \
  17         fi;                             \
  18         rm -f "$$TMP")
  19
  20 # cc-option-yn
  21 # Usage: flag := $(call cc-option-yn,-march=winchip-c6)
  22 cc-option-yn = $(call try-run,\
  23         $(CC) $(KBUILD_CFLAGS) $(1) -S -xc /dev/null -o "$$TMP",y,n)
  24
  25 CFLAGS = -Wall -Wstrict-prototypes -Werror -fomit-frame-pointer -fno-builtin
  26 CFLAGS += -I$(SRC_PATH)
  27 ifeq ($(call cc-option-yn,-fno-stack-protector),y)
  28 CFLAGS += -fno-stack-protector
  29 endif
  30
  31 build-all: multiboot.bin extboot.bin
  32
  33 %.o: %.S
  34         $(CC) $(CFLAGS) -o $@ -c $<
  35
  36 %.img: %.o
  37         $(LD) -Ttext 0 -e _start -s -o $@ $<
  38
  39 %.raw: %.img
  40         $(OBJCOPY) -O binary -j .text $< $@
  41
  42 %.bin: %.raw
  43         $(SRC_PATH)/pc-bios/optionrom/signrom.sh $< $@
  44         cp $@ $(SRC_PATH)/pc-bios/
  45
  46 clean:
  47         $(RM) *.o *.img *.bin *~