[Mesa-dev] [PATCH] build: Error on --enable-glx-tls when building with Clang.

Kenneth Graunke kenneth at whitecape.org
Tue Jan 8 12:36:11 PST 2013

Clang doesn't support the TLS mode we use, so building Mesa with Clang
and --enable-glx-tls simply causes every Piglit test under the sun to
crash when calling glGetString().  Good times.

To avoid catastrophic failure and confusion, simply bail in configure.
 configure.ac | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/configure.ac b/configure.ac
index 1414ce8..e7c6d8d 100644
--- a/configure.ac
+++ b/configure.ac
@@ -981,6 +981,10 @@ AC_ARG_ENABLE([glx-tls],
+if test "x$GLX_USE_TLS" = xyes -a "x$acv_mesa_CLANG" = xyes; then
+    AC_MSG_ERROR([Clang does not support building GLX with TLS])
 AS_IF([test "x$GLX_USE_TLS" = xyes -a "x$ax_pthread_ok" = xyes],

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