summary refs log tree commit diff
path: root/sysdeps/i386/configure
diff options
context:
space:
mode:
authorH.J. Lu <hjl.tools@gmail.com>2017-10-04 17:18:23 -0700
committerH.J. Lu <hjl.tools@gmail.com>2017-10-04 17:18:42 -0700
commitee417882e07277b2a36e7e61e6ef7edd96415b3f (patch)
treebdd0f60f81b8a631c63275ea083308ad4127f404 /sysdeps/i386/configure
parenta67029ff12319300458a502be1d12aa2065c48da (diff)
downloadglibc-ee417882e07277b2a36e7e61e6ef7edd96415b3f.tar.gz
glibc-ee417882e07277b2a36e7e61e6ef7edd96415b3f.tar.xz
glibc-ee417882e07277b2a36e7e61e6ef7edd96415b3f.zip
Don't use hidden visibility in libc.a with PIE on i386
On i386, when multi-arch is enabled, all external functions must be
called via PIC PLT in PIE, which requires setting up EBX register,
since they may be IFUNC functions.

	* config.h.in (NO_HIDDEN_EXTERN_FUNC_IN_PIE): New.
	* include/libc-symbols.h (__hidden_proto_hiddenattr): Add check
	for PIC and NO_HIDDEN_EXTERN_FUNC_IN_PIE.
	* sysdeps/i386/configure.ac (NO_HIDDEN_EXTERN_FUNC_IN_PIE): New
	AC_DEFINE if multi-arch is enabled.
	* sysdeps/i386/configure: Regenerated.
Diffstat (limited to 'sysdeps/i386/configure')
-rw-r--r--sysdeps/i386/configure7
1 files changed, 6 insertions, 1 deletions
diff --git a/sysdeps/i386/configure b/sysdeps/i386/configure
index 4d6685f7c2..4cf968d8bc 100644
--- a/sysdeps/i386/configure
+++ b/sysdeps/i386/configure
@@ -26,7 +26,7 @@ libc_compiler_builtin_inlined=no
 cat > conftest.c <<EOF
 int _start (void) { int a, b, c; __sync_val_compare_and_swap (&a, b, c); return 0; }
 EOF
-if ! { ac_try='${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
+if ! { ac_try='${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS $no_ssp
 		     -O0 -nostdlib -nostartfiles
 		     -S conftest.c -o - | fgrep "__sync_val_compare_and_swap"
 		     1>&5'
@@ -79,3 +79,8 @@ fi
 
 $as_echo "#define PI_STATIC_AND_HIDDEN 1" >>confdefs.h
 
+
+if test x"$multi_arch" != xno; then
+  $as_echo "#define NO_HIDDEN_EXTERN_FUNC_IN_PIE 1" >>confdefs.h
+
+fi