nclude/sys/types: Move wint_t and wctype_t from wchar.h to types.h. This change is compatible as before since wchar.h include types.h indirectly. This fixes a compilation error with newlib's math.h: 'unknown type name wint_t'

include/stddef.h

@@ -45,6 +45,7 @@
 /****************************************************************************
  * Pre-processor Definitions
  ****************************************************************************/
+
 /* The <stddef.h> header shall define the following macros:
  *
  * NULL
@@ -70,6 +71,7 @@
 /****************************************************************************
  * Type Definitions
  ****************************************************************************/
+
 /* The <stddef.h> header shall define the following types:
  *
  * ptrdiff_t

include/sys/types.h

@@ -204,6 +204,19 @@ typedef intptr_t     ptrdiff_t;
 typedef uint16_t     wchar_t;
 #endif
 
+/* wint_t
+ *   An integral type capable of storing any valid value of wchar_t, or WEOF.
+ */
+
+typedef int wint_t;
+
+/* wctype_t
+ *   A scalar type of a data object that can hold values which represent
+ *   locale-specific character classification.
+ */
+
+typedef int wctype_t;
+
 /* blkcnt_t and off_t are signed integer types.
  *
  *   blkcnt_t is used for file block counts.

include/wchar.h

@@ -82,25 +82,21 @@
 /****************************************************************************
  * Type Definitions
  ****************************************************************************/
-/* "The <wchar.h> header defines the following data types through
+
+/* "The <wchar.h> header defines the following data types:
  *
  * wchar_t
- *   As described in <stddef.h>.
+ *   Provided via <stddef.h>.
  *
  * wint_t
  *   An integral type capable of storing any valid value of wchar_t, or WEOF.
- */
-
-typedef int wint_t;
-
-/* wctype_t
+ *   Provided via <sys/type.h>
+ *
+ * wctype_t
  *   A scalar type of a data object that can hold values which represent
- *   locale-specific character classification.
- */
-
-typedef int wctype_t;
-
-/* mbstate_t
+ *   locale-specific character classification.  Provided via <sys/type.h>
+ *
+ * mbstate_t
  *   An object type other than an array type that can hold the conversion
  *   state information necessary to convert between sequences of (possibly
  *   multibyte) characters and wide-characters. If a codeset is being used