From 88bd84a855fe0dd75a84943106c4622ba231f32f Mon Sep 17 00:00:00 2001
From: Zoltan Varga <vargaz@gmail.com>
Date: Tue, 9 Apr 2013 09:26:05 +0200
Subject: Hopefully fix the windows build.

---
 mono/metadata/threads.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/mono/metadata/threads.c b/mono/metadata/threads.c
index ad6e0b2a310..969124f2fda 100644
--- a/mono/metadata/threads.c
+++ b/mono/metadata/threads.c
@@ -798,6 +798,18 @@ mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
 	mono_thread_create_internal (domain, func, arg, FALSE, FALSE, 0);
 }
 
+#if defined(HOST_WIN32) && defined(__GNUC__)
+static __inline__ __attribute__((always_inline))
+/* This is not defined by gcc */
+unsigned long long
+__readfsdword (unsigned long long offset)
+{
+	unsigned long long value;
+	__asm__("movl %%fs:%a[offset], %k[value]" : [value] "=q" (value) : [offset] "irm" (offset));
+	return value;
+}
+#endif
+
 /*
  * mono_thread_get_stack_bounds:
  *
-- 
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