Use __cxa_throw on clang64

Author: qmfrederik

objcxx_eh.cc

@@ -8,7 +8,6 @@ typedef struct objc_object* id;
 #include "objc/runtime.h"
 #include "objc/objc-arc.h"
 #ifdef __MINGW32__
-#include <bits/atomic_word.h>
 #include "objc/objc-exception.h"
 #include "objc/hooks.h"
 #endif
@@ -542,7 +541,7 @@ namespace __cxxabiv1
 	struct __cxa_refcounted_exception
     {
         // Manage this header.
-        _Atomic_word referenceCount;
+        int referenceCount;
         // __cxa_exception must be last, and no padding can be after it.
         __cxa_exception exc;
     };
@@ -559,6 +558,9 @@ void objc_exception_throw(id object)
     objc_retain(object);
     DEBUG_LOG("objc_exception_throw: Throwing 0x%x\n", *exc);
 
+#ifdef _LIBCPP_VERSION
+	__cxa_throw(exc, & __objc_id_type_info, eh_cleanup);
+#else
     __cxa_eh_globals *globals = __cxa_get_globals ();
     globals->uncaughtExceptions += 1;
     __cxa_refcounted_exception *header =
@@ -576,6 +578,7 @@ void objc_exception_throw(id object)
     }
     DEBUG_LOG("Throw returned %d\n",(int) err);
     abort();
+#endif
 }
 
 OBJC_PUBLIC extern objc_uncaught_exception_handler objc_setUncaughtExceptionHandler(objc_uncaught_exception_handler handler)