remove support for non-ANSI compilation

@@ -20,12 +20,13 @@
  * CDDL HEADER END
  */
 /*      Copyright (c) 1988 AT&T */
 /*        All Rights Reserved   */
 
-
 /*
+ * Copyright 2014 Garrett D'Amore <garrett@damore.org>
+ *
  * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
  * Use is subject to license terms.
  */
 
 /*

@@ -85,30 +86,17 @@
 #endif
 #else
 #error "ISA not supported"
 #endif
 
-#if defined(__STDC__)
-
 extern int setjmp(jmp_buf) __RETURNS_TWICE;
 #pragma unknown_control_flow(setjmp)
 extern int _setjmp(jmp_buf) __RETURNS_TWICE;
 #pragma unknown_control_flow(_setjmp)
 extern void longjmp(jmp_buf, int) __NORETURN;
 extern void _longjmp(jmp_buf, int) __NORETURN;
 
-#else
-
-extern int setjmp() __RETURNS_TWICE;
-#pragma unknown_control_flow(setjmp)
-extern int _setjmp() __RETURNS_TWICE;
-#pragma unknown_control_flow(_setjmp)
-extern void longjmp();
-extern void _longjmp();
-
-#endif  /* __STDC__ */
-
 #if __cplusplus >= 199711L
 }
 #endif /* end of namespace std */
 
 #if __cplusplus >= 199711L