mn10300: only add -mmem-funcs to KBUILD_CFLAGS if gcc supports it

commit 9957423f035c2071f6d1c5d2f095cdafbeb25ad7 upstream.

It seems the current (gcc 4.6.3) no longer provides this so make it
conditional.

As reported by Tony before, the mn10300 architecture cross-compiles with
gcc-4.6.3 if -mmem-funcs is not added to KBUILD_CFLAGS.

Reported-by: Tony Breeds <tony@bakeyournoodle.com>
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: David Howells <dhowells@redhat.com>
Cc: Koichi Yasutake <yasutake.koichi@jp.panasonic.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

diff --git a/arch/mn10300/Makefile b/arch/mn10300/Makefile
index 7120282bf0d89c3240886cbad32b973bda1bfc6f..3eb4a52ff9a786d5352fad68213268b37307e31f 100644 (file)
--- a/arch/mn10300/Makefile
+++ b/arch/mn10300/Makefile
@@ -26,7 +26,7 @@ CHECKFLAGS    +=
 PROCESSOR      := unset
 UNIT           := unset
 
-KBUILD_CFLAGS  += -mam33 -mmem-funcs -DCPU=AM33
+KBUILD_CFLAGS  += -mam33 -DCPU=AM33 $(call cc-option,-mmem-funcs,)
 KBUILD_AFLAGS  += -mam33 -DCPU=AM33
 
 ifeq ($(CONFIG_MN10300_CURRENT_IN_E2),y)