Don't redefine wint_t (already defined in <machine/ansi.h> by NetBSD).

Fixes PR#11177.

lang/gcc/patches/patch-at

@@ -0,0 +1,43 @@
+$NetBSD: patch-at,v 1.1 2000/10/16 08:56:02 jlam Exp $
+
+--- ../gcc-2.95.2/gcc/ginclude/stddef.h.orig	Wed Dec 16 16:19:25 1998
++++ ../gcc-2.95.2/gcc/ginclude/stddef.h
+@@ -45,6 +45,12 @@
+ #define _WCHAR_T
+ #endif
+ #endif
++/* On NetBSD, machine/ansi.h defines _BSD_WINT_T_ instead of _WINT_T. */
++#if !defined(_WINT_T_) && !defined(_BSD_WINT_T_)
++#ifndef _BSD_WINT_T_
++#define _WINT_T
++#endif
++#endif
+ /* Undef _FOO_T_ if we are supposed to define foo_t.  */
+ #if defined (__need_ptrdiff_t) || defined (_STDDEF_H_)
+ #undef _PTRDIFF_T_
+@@ -58,6 +64,10 @@
+ #undef _WCHAR_T_
+ #undef _BSD_WCHAR_T_
+ #endif
++#if defined (__need_wint_t) || defined (_STDDEF_H_)
++#undef _WINT_T_
++#undef _BSD_WINT_T_
++#endif
+ #endif /* defined(_ANSI_H_) || defined(_MACHINE_ANSI_H_) */
+ 
+ /* Sequent's header files use _PTRDIFF_T_ in some conflicting way.
+@@ -272,12 +282,14 @@
+ 
+ #if defined (_STDDEF_H) || defined (__need_wint_t)
+ #ifndef _WINT_T
++#ifndef _BSD_WINT_T_
+ #define _WINT_T
+ 
+ #ifndef __WINT_TYPE__
+ #define __WINT_TYPE__ unsigned int
+ #endif
+ typedef __WINT_TYPE__ wint_t;
++#endif
+ #endif
+ #undef __need_wint_t
+ #endif