From 520025d9047ae470360e447e768fe35571ba6965 Mon Sep 17 00:00:00 2001
From: binary1248 <binary1248@hotmail.com>
Date: Sun, 13 Jul 2014 09:22:25 +0200
Subject: [PATCH] Fixed a crash caused by the stack being unaligned when
 entering ThreadImpl::entryPoint if compiled by GCC or clang and run on
 Windows XP 32-bit. (#412)

---
 src/SFML/System/Win32/ThreadImpl.hpp | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/src/SFML/System/Win32/ThreadImpl.hpp b/src/SFML/System/Win32/ThreadImpl.hpp
index 49d7a671b..619d5c3ab 100644
--- a/src/SFML/System/Win32/ThreadImpl.hpp
+++ b/src/SFML/System/Win32/ThreadImpl.hpp
@@ -31,6 +31,17 @@
 #include <SFML/System/NonCopyable.hpp>
 #include <windows.h>
 
+// Fix for unaligned stack with clang and GCC on Windows XP 32-bit
+#if defined(SFML_SYSTEM_WINDOWS) && (defined(__clang__) || defined(__GNUC__))
+
+    #define ALIGN_STACK __attribute__((__force_align_arg_pointer__))
+
+#else
+
+    #define ALIGN_STACK
+
+#endif
+
 
 namespace sf
 {
@@ -81,7 +92,7 @@ private :
     /// \return OS specific error code
     ///
     ////////////////////////////////////////////////////////////
-    static unsigned int __stdcall entryPoint(void* userData);
+    ALIGN_STACK static unsigned int __stdcall entryPoint(void* userData);
 
     ////////////////////////////////////////////////////////////
     // Member data