From c8d33ea6aaa49529df4f50a9a8c8ad1a202a1973 Mon Sep 17 00:00:00 2001
From: Davis King <davis@dlib.net>
Date: Mon, 19 Oct 2015 15:18:30 -0400
Subject: [PATCH] Require the compiler to support the thread_local C++11
 feature.

---
 dlib/use_cpp_11.cmake | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/dlib/use_cpp_11.cmake b/dlib/use_cpp_11.cmake
index 872c8346d..339940828 100644
--- a/dlib/use_cpp_11.cmake
+++ b/dlib/use_cpp_11.cmake
@@ -59,7 +59,9 @@ else()
        ";${CMAKE_CXX_COMPILE_FEATURES};" MATCHES ";cxx_lambdas;" AND
        ";${CMAKE_CXX_COMPILE_FEATURES};" MATCHES ";cxx_defaulted_move_initializers;" AND
        ";${CMAKE_CXX_COMPILE_FEATURES};" MATCHES ";cxx_delegating_constructors;" AND
+       ";${CMAKE_CXX_COMPILE_FEATURES};" MATCHES ";cxx_thread_local;" AND
        ";${CMAKE_CXX_COMPILE_FEATURES};" MATCHES ";cxx_auto_type;")
+
       set(COMPILER_CAN_DO_CPP_11 1)
       # Set which standard to use unless someone has already set it to something
       # newer.