remove support for non-ANSI compilation

*** 20,31 ****
   * CDDL HEADER END
   */
  /*      Copyright (c) 1988 AT&T */
  /*        All Rights Reserved   */
  
- 
  /*
   * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
  
  #ifndef _SETJMP_H
--- 20,32 ----
   * CDDL HEADER END
   */
  /*      Copyright (c) 1988 AT&T */
  /*        All Rights Reserved   */
  
  /*
+  * Copyright 2014 Garrett D'Amore <garrett@damore.org>
+  *
   * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
  
  #ifndef _SETJMP_H
*** 44,55 ****
  
  #ifdef  __cplusplus
  extern "C" {
  #endif
  
- #if defined(__STDC__)
- 
  #if !defined(_STRICT_STDC) || defined(__XOPEN_OR_POSIX) || \
          defined(__EXTENSIONS__)
  /* non-ANSI standard compilation */
  
  #if defined(_LP64) || defined(_I32LPx)
--- 45,54 ----
*** 61,84 ****
  extern int sigsetjmp(sigjmp_buf, int) __RETURNS_TWICE;
  #pragma unknown_control_flow(sigsetjmp)
  extern void siglongjmp(sigjmp_buf, int) __NORETURN;
  #endif
  
- #else /* __STDC__ */
- 
- #if defined(_LP64) || defined(_I32LPx)
- typedef long sigjmp_buf[_SIGJBLEN];
- #else
- typedef int sigjmp_buf[_SIGJBLEN];
- #endif
- 
- extern int sigsetjmp() __RETURNS_TWICE;
- #pragma unknown_control_flow(sigsetjmp)
- extern void siglongjmp();
- 
- #endif  /* __STDC__ */
- 
  #ifdef  __cplusplus
  }
  #endif
  
  #endif  /* _SETJMP_H */
--- 60,69 ----