pc-bios/optionrom/Makefile

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