Bug 420217 - _InterlockedCompareExchange needs to be extern "C" when using a C++ compiler, r=brendan a1.9b4=beltzner

js/src/jslock.c

@@ -86,8 +86,10 @@ js_UnlockGlobal(void *id)
 /* Exclude Alpha NT. */
 #if defined(_WIN32) && defined(_M_IX86)
 #pragma warning( disable : 4035 )
+JS_BEGIN_EXTERN_C
 extern long __cdecl
 _InterlockedCompareExchange(long *volatile dest, long exchange, long comp);
+JS_END_EXTERN_C
 #pragma intrinsic(_InterlockedCompareExchange)
 
 static JS_INLINE int