ctype: Fixup for C++ compatibility

libstdc++ uses _ctype_ and the various ctype bitmasks, so we need
to make those visible when compiling with C++.

Signed-off-by: Keith Packard <[email protected]>

Author: keith-packard

newlib/libc/include/ctype.h

@@ -225,8 +225,6 @@ extern const short      _ctype_wide[];
 
 #define _ctype_ (_ctype_b + _CTYPE_OFFSET)
 
-#ifndef __cplusplus
-
 #define	_U	0x001    /* upper */
 #define	_L	0x002    /* lower */
 #define	_N	0x004    /* digit */
@@ -245,6 +243,8 @@ const char *__locale_ctype_ptr (void);
 #define __CTYPE_PTR	_ctype_
 #endif
 
+#ifndef __cplusplus
+
 #define __ctype_lookup(__c) (__CTYPE_PTR + 1)[(int) (__c)]
 
 #define	isalpha(__c)	(__ctype_lookup(__c)&(_U|_L))