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-rw-r--r--Makefile7
1 files changed, 7 insertions, 0 deletions
diff --git a/Makefile b/Makefile
index 34d6176..c3a7271 100644
--- a/Makefile
+++ b/Makefile
@@ -263,6 +263,13 @@ export quiet Q KBUILD_VERBOSE
# cc support functions to be used (only) in arch/$(ARCH)/Makefile
# See documentation in Documentation/kbuild/makefiles.txt
+# as-option
+# Usage: cflags-y += $(call as-option, -Wa$(comma)-isa=foo,)
+
+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 ;)
+
# cc-option
# Usage: cflags-y += $(call cc-option, -march=winchip-c6, -march=i586)
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