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| author | Denis Kaganovich <mahatma@eu.by> | 2016-10-20 22:01:39 +0200 |
|---|---|---|
| committer | Mike Frysinger <vapier@gentoo.org> | 2016-11-15 14:32:21 -0500 |
| commit | e474f526b4ece48cc081a4434b165b3c9082a360 (patch) | |
| tree | 8c933b9170c4bc42d8a9aa49ff6619b72264f827 | |
| parent | 2286e84a642ddeef1df3c485cd63ce354d266140 (diff) | |
| download | glibc-e474f526b4ece48cc081a4434b165b3c9082a360.zip glibc-e474f526b4ece48cc081a4434b165b3c9082a360.tar.gz glibc-e474f526b4ece48cc081a4434b165b3c9082a360.tar.bz2 | |
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
(cherry picked from commit c7409aded44634411a19b0b7178b7faa237835e6)
(cherry picked from commit a6a59e99d1249dc386d0a042c39e3860fbb7b6b6)
| -rwxr-xr-x | configure | 8 | ||||
| -rw-r--r-- | configure.ac | 8 |
2 files changed, 10 insertions, 6 deletions
@@ -6252,12 +6252,14 @@ echo >&5 "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 ;; *) as_fn_error $? "unexpected symbols in test: $libc_undefs" "$LINENO" 5 ;; esac diff --git a/configure.ac b/configure.ac index 3c766b7..5932138 100644 --- a/configure.ac +++ b/configure.ac @@ -1603,12 +1603,14 @@ 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], |