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