| From: Baruch Siach <baruch@tkos.co.il> |
| 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 <baruch@tkos.co.il> |
| --- |
| 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 |
| |
