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authorDenis Kaganovich <mahatma@eu.by>2016-10-20 22:01:39 +0200
committerMike Frysinger <vapier@gentoo.org>2016-11-15 14:15:19 -0500
commitc7409aded44634411a19b0b7178b7faa237835e6 (patch)
treea3fbfec4d7a785a397fe9bb2fed98c7dbf86b855 /configure.ac
parent001f81ad1e792dddd75aa8a6f9d1d9b0ba8dc16e (diff)
downloadglibc-c7409aded44634411a19b0b7178b7faa237835e6.tar.gz
configure: accept __stack_chk_fail_local for ssp support too [BZ #20662]
When glibc is compiled with gcc 6.2 that has been configured with --enable-default-pie and --enable-default-ssp, the configure script fails to detect that the compiler has ssp turned on by default when being built for i686-linux-gnu. This is because gcc is emitting __stack_chk_fail_local but the script is only looking for __stack_chk_fail. Support both. Example output: checking whether x86_64-pc-linux-gnu-gcc -m32 -Wl,-O1 -Wl,--as-needed implicitly enables -fstack-protector... no
Diffstat (limited to 'configure.ac')
-rw-r--r--configure.ac8
1 files changed, 5 insertions, 3 deletions
diff --git a/configure.ac b/configure.ac
index a64aeb9979..de0a40f1a7 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1667,12 +1667,14 @@ echo >&AS_MESSAGE_LOG_FD "libc_undefs='$libc_undefs'"
# symbols (resolved by the linker), so filter out unknown symbols.
# This will fail to produce the correct result if the compiler
# defaults to -fstack-protector but this produces an undefined symbol
-# other than __stack_chk_fail. However, compilers like that have not
-# been encountered in practice.
-libc_undefs=`echo "$libc_undefs" | egrep '^(foobar|__stack_chk_fail)$'`
+# other than __stack_chk_fail or __stack_chk_fail_local. However,
+# compilers like that have not been encountered in practice.
+libc_undefs=`echo "$libc_undefs" | \
+ egrep '^(foobar|__stack_chk_fail|__stack_chk_fail_local)$'`
case "$libc_undefs" in
foobar) libc_cv_predef_stack_protector=no ;;
'__stack_chk_fail
+foobar'|'__stack_chk_fail_local
foobar') libc_cv_predef_stack_protector=yes ;;
*) AC_MSG_ERROR([unexpected symbols in test: $libc_undefs]) ;;
esac],