46 lines
1.6 KiB
Diff
46 lines
1.6 KiB
Diff
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From: Baruch Siach <baruch@tkos.co.il>
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Date: Tue, 27 Oct 2015 13:58:24 +0200
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Subject: [PATCH] configure.ac: fix stack protector test
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gcc does not generate stack protection check code for function that does not
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use its stack. Some toolchain (most notable uClibc based) accept the
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-fstack-protector option, but don't provide libssp. The current test will
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incorrectly identify this case, leading to link failures like:
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ipmiutil.o: In function `main':
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ipmiutil.c:(.text.startup+0x1c0): undefined reference to
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`__stack_chk_fail_local'
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ialarms.o: In function `get_alarms_picmg':
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ialarms.c:(.text+0x1c5): undefined reference to `__stack_chk_fail_local'
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ialarms.o: In function `.L46':
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ialarms.c:(.text+0x362): undefined reference to `__stack_chk_fail_local'
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ialarms.o: In function `get_enc_leds':
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ialarms.c:(.text+0x45f): undefined reference to `__stack_chk_fail_local'
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Add stack usage code to the test to correctly identify missing libssp.
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Patch status: sent upstream
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(http://sourceforge.net/p/ipmiutil/mailman/message/34572536/)
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Signed-off-by: Baruch Siach <baruch@tkos.co.il>
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---
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configure.ac | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/configure.ac b/configure.ac
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index 41b6ea89167a..f3f60fb9ff69 100644
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--- a/configure.ac
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+++ b/configure.ac
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@@ -334,7 +334,7 @@ else
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rm -f $tmpc $tmpo >/dev/null 2>&1
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echo $ECHO_N "checking compile fortify flags ... $ECHO_C"
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cfhard="-fstack-protector --param=ssp-buffer-size=4 -D_FORTIFY_SOURCE=2"
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- echo "int main() { return(1); }" >$tmpc
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+ echo "int main() { alloca(100); return(1); }" >$tmpc
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$CC -o $tmpo $cfhard $tmpc >/dev/null 2>&1
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if test $? -ne 0 ; then
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cfhard=
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--
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2.6.1
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