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Date:	Fri, 15 Jul 2011 04:23:42 GMT
From:	tip-bot for Andy Lutomirski <luto@....edu>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...hat.com,
	luto@....edu, tglx@...utronix.de, hpa@...ux.intel.com
Subject: [tip:x86/vdso] x86-64: Add --no-undefined to vDSO build

Commit-ID:  7f79ad15f33cf4968cafb0e3d2beba427de01d3a
Gitweb:     http://git.kernel.org/tip/7f79ad15f33cf4968cafb0e3d2beba427de01d3a
Author:     Andy Lutomirski <luto@....edu>
AuthorDate: Wed, 13 Jul 2011 09:24:12 -0400
Committer:  H. Peter Anvin <hpa@...ux.intel.com>
CommitDate: Wed, 13 Jul 2011 11:23:09 -0700

x86-64: Add --no-undefined to vDSO build

This gives much nicer diagnostics when something goes wrong.  It's
supported at least as far back as binutils 2.15.

Signed-off-by: Andy Lutomirski <luto@....edu>
Link: http://lkml.kernel.org/r/de0b50920469ff6359c529526e7639fdd36fa83c.1310563276.git.luto@mit.edu
Signed-off-by: H. Peter Anvin <hpa@...ux.intel.com>
---
 arch/x86/vdso/Makefile |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/arch/x86/vdso/Makefile b/arch/x86/vdso/Makefile
index bef0bc9..5d17950 100644
--- a/arch/x86/vdso/Makefile
+++ b/arch/x86/vdso/Makefile
@@ -26,6 +26,7 @@ targets += vdso.so vdso.so.dbg vdso.lds $(vobjs-y)
 export CPPFLAGS_vdso.lds += -P -C
 
 VDSO_LDFLAGS_vdso.lds = -m64 -Wl,-soname=linux-vdso.so.1 \
+			-Wl,--no-undefined \
 		      	-Wl,-z,max-page-size=4096 -Wl,-z,common-page-size=4096
 
 $(obj)/vdso.o: $(src)/vdso.S $(obj)/vdso.so
--
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