linux-kernel - [tip:x86/urgent] x86/build: Fix build with older GCC versions

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Date:   Tue, 25 Oct 2016 03:31:23 -0700
From:   tip-bot for Jan Beulich <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     hpa@...or.com, mingo@...nel.org, jbeulich@...e.com,
        torvalds@...ux-foundation.org, valdis.kletnieks@...edu,
        linux-kernel@...r.kernel.org, peterz@...radead.org,
        tglx@...utronix.de, JBeulich@...e.com
Subject: [tip:x86/urgent] x86/build: Fix build with older GCC versions

Commit-ID:  a2209b742e6cf978b85d4f31a25a269c3d3b062b
Gitweb:     http://git.kernel.org/tip/a2209b742e6cf978b85d4f31a25a269c3d3b062b
Author:     Jan Beulich <JBeulich@...e.com>
AuthorDate: Mon, 24 Oct 2016 09:00:12 -0600
Committer:  Ingo Molnar <mingo@...nel.org>
CommitDate: Tue, 25 Oct 2016 11:44:25 +0200

x86/build: Fix build with older GCC versions

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@...e.com>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Valdis Kletnieks <valdis.kletnieks@...edu>
Cc: Valdis.Kletnieks@...edu
Fixes: 5e44258d16 "x86/build: Reduce the W=1 warnings noise when compiling x86 syscall tables"
Link: http://lkml.kernel.org/r/580E3E1C02000078001191C4@prv-mh.provo.novell.com
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 arch/x86/entry/Makefile | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/x86/entry/Makefile b/arch/x86/entry/Makefile
index 77f28ce..9976fce 100644
--- a/arch/x86/entry/Makefile
+++ b/arch/x86/entry/Makefile
@@ -5,8 +5,8 @@
 OBJECT_FILES_NON_STANDARD_entry_$(BITS).o   := y
 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