diff --git a/pc-bios/optionrom/Makefile b/pc-bios/optionrom/Makefile
index 2a0a7e71839b1f4ff91a0d32c81cc0ae6e6cc067..b3f487b6b676d20a81d39f09d7c5882b4a05fd77 100644
--- a/pc-bios/optionrom/Makefile
+++ b/pc-bios/optionrom/Makefile
@@ -5,29 +5,9 @@ include ../../rules.mak
 
 VPATH=$(SRC_PATH)/pc-bios/optionrom
 
-# from kernel sources - scripts/Kbuild.include
-# try-run
-# Usage: option = $(call try-run, $(CC)...-o "$$TMP",option-ok,otherwise)
-# Exit code chooses option. "$$TMP" is can be used as temporary file and
-# is automatically cleaned up.
-try-run = $(shell set -e;		\
-	TMP="$(TMPOUT).$$$$.tmp";	\
-	if ($(1)) >/dev/null 2>&1;	\
-	then echo "$(2)";		\
-	else echo "$(3)";		\
-	fi;				\
-	rm -f "$$TMP")
-
-# cc-option-yn
-# Usage: flag := $(call cc-option-yn,-march=winchip-c6)
-cc-option-yn = $(call try-run,\
-	$(CC) $(KBUILD_CFLAGS) $(1) -S -xc /dev/null -o "$$TMP",y,n)
-
 CPPFLAGS = -Wall -Wstrict-prototypes -Werror -fomit-frame-pointer -fno-builtin
 CPPFLAGS += -I$(SRC_PATH)
-ifeq ($(call cc-option-yn,-fno-stack-protector),y)
-CPPFLAGS += -fno-stack-protector
-endif
+CPPFLAGS += $(call cc-option, $(CFLAGS), -fno-stack-protector,"")
 
 build-all: multiboot.bin