We need to include config.h to get the proper setting to LLVM_MULTITHREADED.
Patch by Xerxes Ranby.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@74846 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/System/Threading.cpp b/lib/System/Threading.cpp
index c6a8214..bc41afe 100644
--- a/lib/System/Threading.cpp
+++ b/lib/System/Threading.cpp
@@ -11,6 +11,7 @@
//
//===----------------------------------------------------------------------===//
+#include "llvm/Config/config.h"
#include "llvm/System/Threading.h"
#include "llvm/System/Atomic.h"
#include "llvm/System/Mutex.h"