Populate wint_t from wctype.h, and use it in wchar.h.

Author: lcartey

cpp/common/test/includes/standard-library/cwctype

@@ -0,0 +1,8 @@
+#ifndef _GHLIBCPP_CWCTYPE
+#define _GHLIBCPP_CWCTYPE
+
+namespace std {
+using ::wint_t;
+} // namespace std
+
+#endif // _GHLIBCPP_CWCTYPE

cpp/common/test/includes/standard-library/wchar.h

@@ -2,10 +2,11 @@
 #define _GHLIBCPP_WCHAR
 
 #include "stddef.h"
+#include "wctype.h"
 
 // Wide character I/O functions
-wchar_t fgetwc(void *stream);
-wchar_t fputwc(wchar_t wc, void *stream);
+wint_t fgetwc(void *stream);
+wint_t fputwc(wchar_t wc, void *stream);
 
 // Wide character string conversion functions
 long wcstol(const wchar_t *str, wchar_t **endptr, int base);

cpp/common/test/includes/standard-library/wctype.h

@@ -0,0 +1,6 @@
+#ifndef _GHLIBCPP_WCTYPE
+#define _GHLIBCPP_WCTYPE
+
+typedef long wint_t;
+
+#endif // _GHLIBCPP_WCTYPE