From 21d4a791da47cf35956102d0b96208e3e595b617 Mon Sep 17 00:00:00 2001
From: Avi Kivity <avi@redhat.com>
Date: Wed, 23 Nov 2011 11:24:25 +0200
Subject: [PATCH] configure: tighten pie toolchain support test for tls
 variables

Some toolchains don't support pie properly when tls variables are
in use.  Disallow pie when such toolchains are detected.

Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
---
 configure | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/configure b/configure
index f033438..a7caf1e 100755
--- a/configure
+++ b/configure
@@ -1120,7 +1120,17 @@ fi
 
 if test "$pie" != "no" ; then
   cat > $TMPC << EOF
-int main(void) { return 0; }
+
+#ifdef __linux__
+#  define THREAD __thread
+#else
+#  define THREAD
+#endif
+
+static THREAD int tls_var;
+
+int main(void) { return tls_var; }
+
 EOF
   if compile_prog "-fPIE -DPIE" "-pie"; then
     QEMU_CFLAGS="-fPIE -DPIE $QEMU_CFLAGS"
-- 
2.7.4