diff -C 2 -r qemu-2.11.0/pc-bios/optionrom/Makefile qemu-2.11.0-patched/pc-bios/optionrom/Makefile
*** qemu-2.11.0/pc-bios/optionrom/Makefile	2017-12-14 02:27:20.000000000 +0900
--- qemu-2.11.0-patched/pc-bios/optionrom/Makefile	2018-02-15 17:25:43.387705308 +0900
***************
*** 45,49 ****
  
  %.o: %.S
! 	$(call quiet-command,$(CPP) $(QEMU_INCLUDES) $(QEMU_DGFLAGS) -c -o - $< | $(AS) $(ASFLAGS) -o $@,"AS","$(TARGET_DIR)$@")
  
  %.img: %.o
--- 45,49 ----
  
  %.o: %.S
! 	$(call quiet-command,$(CPP) $(QEMU_INCLUDES) $(QEMU_DGFLAGS) -o - $< | $(AS) $(ASFLAGS) -o $@,"AS","$(TARGET_DIR)$@")
  
  %.img: %.o