Implement GNU extension wcsftime_l

Signed-off-by: Corinna Vinschen <corinna@vinschen.de>

newlib/libc/include/wchar.h

@@ -132,6 +132,10 @@ wchar_t	*_EXFUN(_wcsdup_r, (struct _reent *, const wchar_t * ));
 size_t	_EXFUN(wcscspn, (const wchar_t *, const wchar_t *));
 size_t  _EXFUN(wcsftime, (wchar_t *__restrict, size_t,
 				const wchar_t *__restrict, const struct tm *__restrict));
+#if __GNU_VISIBLE
+size_t  wcsftime_l (wchar_t *__restrict, size_t, const wchar_t *__restrict,
+		    const struct tm *__restrict, locale_t);
+#endif
 size_t	_EXFUN(wcslcat, (wchar_t *, const wchar_t *, size_t));
 size_t	_EXFUN(wcslcpy, (wchar_t *, const wchar_t *, size_t));
 size_t	_EXFUN(wcslen, (const wchar_t *));

newlib/libc/time/strftime.c

@@ -311,6 +311,7 @@ locale, hard-coding the "C" locale settings.
 #  define STRLEN(a)	strlen(a)
 # else
 #  define strftime	wcsftime	/* Alternate function name */
+#  define strftime_l	wcsftime_l	/* Alternate function name */
 #  define CHAR		wchar_t		/* string type basis */
 #  define CQ(a)		L##a		/* character constant qualifier */
 #  define snprintf	swprintf	/* wide-char equivalent function name */
@@ -1460,9 +1461,8 @@ _DEFUN (strftime, (s, maxsize, format, tim_p),
 #endif /* !_WANT_C99_TIME_FORMATS */
 }
 
-#if !defined(MAKE_WCSFTIME)
 size_t
-strftime_l (char *__restrict s, size_t maxsize, const char *__restrict format,
+strftime_l (CHAR *__restrict s, size_t maxsize, const CHAR *__restrict format,
 	    const struct tm *__restrict tim_p, struct __locale_t *locale)
 {
 #ifdef _WANT_C99_TIME_FORMATS
@@ -1479,7 +1479,6 @@ strftime_l (char *__restrict s, size_t maxsize, const char *__restrict format,
   return __strftime (s, maxsize, format, tim_p, locale, NULL, NULL);
 #endif /* !_WANT_C99_TIME_FORMATS */
 }
-#endif
 
 /* The remainder of this file can serve as a regression test.  Compile
  *  with -D_REGRESSION_TEST.  */

winsup/cygwin/common.din

@@ -1522,6 +1522,7 @@ wcscpy NOSIGFE
 wcscspn NOSIGFE
 wcsdup NOSIGFE
 wcsftime SIGFE
+wcsftime_l SIGFE
 wcslcat NOSIGFE
 wcslcpy NOSIGFE
 wcslen NOSIGFE