remove support for non-ANSI compilation

*** 18,36 ****
   *
   * CDDL HEADER END
   */
  
  /*
   * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
  
  #ifndef _THREAD_H
  #define _THREAD_H
  
- #pragma ident   "%Z%%M% %I%     %E% SMI"
- 
  /*
   * thread.h:
   * definitions needed to use the thread interface except synchronization.
   * use <synch.h> for thread synchronization.
   */
--- 18,36 ----
   *
   * CDDL HEADER END
   */
  
  /*
+  * Copyright 2014 Garrett D'Amore <garrett@damore.org>
+  *
   * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
  
  #ifndef _THREAD_H
  #define _THREAD_H
  
  /*
   * thread.h:
   * definitions needed to use the thread interface except synchronization.
   * use <synch.h> for thread synchronization.
   */
*** 49,59 ****
  typedef unsigned int thread_t;
  typedef unsigned int thread_key_t;
  #endif /* _ASM */
  
  #ifndef _ASM
- #ifdef __STDC__
  
  extern int thr_create(void *, size_t, void *(*)(void *), void *, long,
                          thread_t *);
  extern int thr_join(thread_t, thread_t *, void **);
  extern int thr_setconcurrency(int);
--- 49,58 ----
*** 90,123 ****
  extern int thr_keycreate_once(thread_key_t *, void(*)(void *));
  extern int thr_setspecific(thread_key_t, void *);
  extern int thr_getspecific(thread_key_t, void **);
  extern size_t thr_min_stack(void);
  
- #else /* __STDC */
- 
- extern int thr_create();
- extern int thr_join();
- extern int thr_setconcurrency();
- extern int thr_getconcurrency();
- extern void thr_exit();
- extern thread_t thr_self();
- extern int thr_sigsetmask();
- extern int thr_stksegment();
- extern int thr_main();
- extern int thr_kill();
- extern int thr_suspend();
- extern int thr_continue();
- extern void thr_yield();
- extern int thr_setprio();
- extern int thr_getprio();
- extern int thr_keycreate();
- extern int thr_keycreate_once();
- extern int thr_setspecific();
- extern int thr_getspecific();
- extern size_t thr_min_stack();
- 
- #endif /* __STDC */
  #endif /* _ASM */
  
  #define THR_MIN_STACK   thr_min_stack()
  /*
   * thread flags (one word bit mask)
--- 89,98 ----