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

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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@mit.edu>
Link: http://lkml.kernel.org/r/de0b50920469ff6359c529526e7639fdd36fa83c.1310563276.git.luto@mit.edu
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
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Andy Lutomirski 2011-07-13 09:24:12 -04:00 committed by H. Peter Anvin
parent 1b3f2a72bb
commit 7f79ad15f3
1 changed files with 1 additions and 0 deletions
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arch/x86/vdso/Makefile
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@ -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