[PATCH] x86: Detect CFI support in the assembler at runtime
[linux-2.6.git] / scripts / Kbuild.include
index 3d52389..7adef12 100644 (file)
@@ -63,6 +63,13 @@ as-option = $(shell if $(CC) $(CFLAGS) $(1) -Wa,-Z -c -o /dev/null \
             -xassembler /dev/null > /dev/null 2>&1; then echo "$(1)"; \
             else echo "$(2)"; fi ;)
 
+# as-instr
+# Usage: cflags-y += $(call as-instr, instr, option1, option2)
+
+as-instr = $(shell if echo -e "$(1)" | $(AS) -Z -o astest$$$$.out \
+                  2>&1 >/dev/null ; then echo "$(2)"; else echo "$(3)"; fi; \
+                  rm -f astest$$$$.out)
+
 # cc-option
 # Usage: cflags-y += $(call cc-option, -march=winchip-c6, -march=i586)