linux-kernel - [tip:x86/urgent] x86, gcc-4.6: Use gcc -m options when building vdso

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Message-ID: <tip-0406d960122bce54e6610e2e6a63e8cc6f3699e3@git.kernel.org>
Date:	Tue, 14 Dec 2010 00:06:59 GMT
From:	"tip-bot for H. Peter Anvin" <hpa@...ux.intel.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...hat.com,
	tglx@...utronix.de, hpa@...ux.intel.com, hjl.tools@...il.com
Subject: [tip:x86/urgent] x86, gcc-4.6: Use gcc -m options when building vdso

Commit-ID:  0406d960122bce54e6610e2e6a63e8cc6f3699e3
Gitweb:     http://git.kernel.org/tip/0406d960122bce54e6610e2e6a63e8cc6f3699e3
Author:     H. Peter Anvin <hpa@...ux.intel.com>
AuthorDate: Mon, 13 Dec 2010 16:01:38 -0800
Committer:  H. Peter Anvin <hpa@...ux.intel.com>
CommitDate: Mon, 13 Dec 2010 16:01:38 -0800

x86, gcc-4.6: Use gcc -m options when building vdso

The vdso Makefile passes linker-style -m options not to the linker but
to gcc.  This happens to work with earlier gcc, but fails with gcc
4.6.  Pass gcc-style -m options, instead.

Note: all currently supported versions of gcc supports -m32, so there
is no reason to conditionalize it any more.

Reported-by: H. J. Lu <hjl.tools@...il.com>
Signed-off-by: H. Peter Anvin <hpa@...ux.intel.com>
LKML-Reference: <tip-*@....kernel.org>
---
 arch/x86/vdso/Makefile |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/x86/vdso/Makefile b/arch/x86/vdso/Makefile
index 4a2afa1..b6552b1 100644
--- a/arch/x86/vdso/Makefile
+++ b/arch/x86/vdso/Makefile
@@ -25,7 +25,7 @@ targets += vdso.so vdso.so.dbg vdso.lds $(vobjs-y)
 
 export CPPFLAGS_vdso.lds += -P -C
 
-VDSO_LDFLAGS_vdso.lds = -m elf_x86_64 -Wl,-soname=linux-vdso.so.1 \
+VDSO_LDFLAGS_vdso.lds = -m64 -Wl,-soname=linux-vdso.so.1 \
 		      	-Wl,-z,max-page-size=4096 -Wl,-z,common-page-size=4096
 
 $(obj)/vdso.o: $(src)/vdso.S $(obj)/vdso.so
@@ -69,7 +69,7 @@ vdso32.so-$(VDSO32-y)		+= sysenter
 vdso32-images			= $(vdso32.so-y:%=vdso32-%.so)
 
 CPPFLAGS_vdso32.lds = $(CPPFLAGS_vdso.lds)
-VDSO_LDFLAGS_vdso32.lds = -m elf_i386 -Wl,-soname=linux-gate.so.1
+VDSO_LDFLAGS_vdso32.lds = -m32 -Wl,-soname=linux-gate.so.1
 
 # This makes sure the $(obj) subdirectory exists even though vdso32/
 # is not a kbuild sub-make subdirectory.
--
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