From: Avi Kivity <avi@redhat.com>
Date: Wed, 23 Nov 2011 09:24:25 +0000 (+0200)
Subject: configure: tighten pie toolchain support test for tls variables
X-Git-Tag: Tizen_Studio_1.3_Release_p2.3.1~1405^2~17^2~1325
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=21d4a791da47cf35956102d0b96208e3e595b617;p=sdk%2Femulator%2Fqemu.git

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>
---

diff --git a/configure b/configure
index f033438210..a7caf1e190 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"