Workaround what I believe is an MSVC bug where it emits a definition for a

static const class member into each translation unit, with external linkage???
 - If someone understands this issue better, please clue me in, I haven't
   consulted the standard yet.

llvm-svn: 82516

llvm/lib/Support/StringRef.cpp

@@ -10,7 +10,10 @@
 #include "llvm/ADT/StringRef.h"
 using namespace llvm;
 
+// MSVC emits references to this into the translation units which reference it.
+#ifndef _MSC_VER
 const size_t StringRef::npos;
+#endif
 
 //===----------------------------------------------------------------------===//
 // String Searching