fix PR7192 by defining wchar_t in a more conventional way. The

type of L"x" can change based on command line arguments.

llvm-svn: 113127

clang/lib/Headers/stddef.h

@@ -34,7 +34,7 @@ typedef __typeof__(sizeof(int)) size_t;
 #ifndef __cplusplus
 #ifndef _WCHAR_T
 #define _WCHAR_T
-typedef __typeof__(*L"") wchar_t;
+typedef __WCHAR_TYPE__ wchar_t;
 #endif
 #endif
 

clang/test/Sema/warn-write-strings.c

@@ -2,3 +2,9 @@
 
 // PR4804
 char* x = "foo"; // expected-warning {{initializing 'char *' with an expression of type 'const char [4]' discards qualifiers}}
+
+// PR7192
+#include <stddef.h>
+void test(wchar_t *dst) {
+  dst[0] = 0;  // Ok.
+}