remove support for non-ANSI compilation

@@ -21,10 +21,12 @@
 /*      Copyright (c) 1988 AT&T */
 /*        All Rights Reserved   */
 
 
 /*
+ * Copyright 2014 Garrett D'Amore <garrett@damore.org>
+ *
  * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
  * Use is subject to license terms.
  */
 
 #ifndef _UCONTEXT_H

@@ -46,18 +48,17 @@
 #else
 #define makecontext     __makecontext_v2
 #endif
 #endif
 
-#if defined(__STDC__)
-
 extern int getcontext(ucontext_t *) __RETURNS_TWICE;
 #pragma unknown_control_flow(getcontext)
 extern int setcontext(const ucontext_t *) __NORETURN;
 extern int swapcontext(ucontext_t *_RESTRICT_KYWD,
                 const ucontext_t *_RESTRICT_KYWD);
 extern void makecontext(ucontext_t *, void(*)(), int, ...);
+
 #if !defined(_XPG4_2) || defined(__EXTENSIONS__)
 extern int walkcontext(const ucontext_t *, int (*)(uintptr_t, int, void *),
     void *);
 extern int printstack(int);
 extern int addrtosymstr(void *, char *, int);

@@ -68,34 +69,12 @@
 extern int stack_setbounds(const stack_t *);
 extern int stack_inbounds(void *);
 extern int stack_violation(int, const siginfo_t *, const ucontext_t *);
 
 extern void *_stack_grow(void *);
-#endif
-#else
+#endif  /* !_XPG4_2 || __EXTENSIONS__ */
 
-extern int getcontext() __RETURNS_TWICE;
-#pragma unknown_control_flow(getcontext)
-extern int setcontext();
-extern int swapcontext();
-extern void makecontext();
-#if !defined(_XPG4_2) || defined(__EXTENSIONS__)
-extern int walkcontext();
-extern int printstack();
-extern int addrtosymstr();
-extern int getustack();
-extern int setustack();
-
-extern int stack_getbounds();
-extern int stack_setbounds();
-extern int stack_inbounds();
-extern int stack_violation();
-
-extern void *_stack_grow();
-#endif
-#endif
-
 #ifdef  __cplusplus
 }
 #endif
 
 #endif  /* _UCONTEXT_H */