From 6716aa83526b3f866d73a033970cc920bc61c13f Mon Sep 17 00:00:00 2001
From: Jason Evans <je@fb.com>
Date: Mon, 23 Apr 2012 13:04:55 -0700
Subject: [PATCH] Force use of TLS if heap profiling is enabled.

---
 configure.ac | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/configure.ac b/configure.ac
index 73389905..98211c8c 100644
--- a/configure.ac
+++ b/configure.ac
@@ -678,6 +678,10 @@ fi
 AC_MSG_CHECKING([configured backtracing method])
 AC_MSG_RESULT([$backtrace_method])
 if test "x$enable_prof" = "x1" ; then
+  if test "x${force_tls}" = "x0" ; then
+    AC_MSG_ERROR([Heap profiling requires TLS]);
+  fi
+  force_tls="1"
   AC_DEFINE([JEMALLOC_PROF], [ ])
 fi
 AC_SUBST([enable_prof])