[PATCH 4.8 66/92] x86/build: Fix build with older GCC versions

From: Greg Kroah-Hartman
Date: Thu Nov 17 2016 - 05:36:52 EST

4.8-stable review patch. If anyone has any objections, please let me know.


From: Jan Beulich <JBeulich@xxxxxxxx>

commit a2209b742e6cf978b85d4f31a25a269c3d3b062b upstream.

Older GCC (observed with 4.1.x) doesn't support -Wno-override-init and
also doesn't ignore unknown -Wno-* options.

Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Valdis Kletnieks <valdis.kletnieks@xxxxxx>
Cc: Valdis.Kletnieks@xxxxxx
Fixes: 5e44258d16 "x86/build: Reduce the W=1 warnings noise when compiling x86 syscall tables"
Link: http://lkml.kernel.org/r/580E3E1C02000078001191C4@xxxxxxxxxxxxxxxxxxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

arch/x86/entry/Makefile | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

--- a/arch/x86/entry/Makefile
+++ b/arch/x86/entry/Makefile
@@ -5,8 +5,8 @@
OBJECT_FILES_NON_STANDARD_entry_64_compat.o := y

-CFLAGS_syscall_64.o += -Wno-override-init
-CFLAGS_syscall_32.o += -Wno-override-init
+CFLAGS_syscall_64.o += $(call cc-option,-Wno-override-init,)
+CFLAGS_syscall_32.o += $(call cc-option,-Wno-override-init,)
obj-y := entry_$(BITS).o thunk_$(BITS).o syscall_$(BITS).o
obj-y += common.o