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*** os.h.orig	Sun Nov 20 14:46:54 1994
--- os.h	Sun Nov 20 15:00:33 1994
***************
*** 25,31 ****
  #include <errno.h>
  #include <sys/param.h>
  
! #if defined(BSDI) || defined(__386BSD__) || defined(_CX_UX)
  # include <signal.h>
  #endif /* BSDI || __386BSD__ || _CX_UX */
  
--- 25,31 ----
  #include <errno.h>
  #include <sys/param.h>
  
! #if defined(BSDI) || defined(__386BSD__) || defined(_CX_UX) || defined(__FreeBSD__)
  # include <signal.h>
  #endif /* BSDI || __386BSD__ || _CX_UX */
  
***************
*** 48,54 ****
--- 48,56 ----
  #ifndef linux /* all done in <errno.h> */
  extern int errno;
  extern int sys_nerr;
+ #if BSD < 199306
  extern char *sys_errlist[];
+ #endif
  #endif /* linux */
  
  #ifdef sun