Patch for building Scsh 0.5.0 on Irix 5.3

[Kevin Esler <esler@pureatria.com>]

In order to build on Irix 5.3 I had to do two things:

1. patch scsh/sleep1.c as follows
   (probably not necessary if you build with gcc, but my gcc on Irix
    seems to be broken right now):
   
>----------------------------------------------------------------<   
*** 1.1 1997/04/22 20:44:13
--- sleep1.c    1997/04/22 20:47:45
***************
*** 35,41 ****
    int delta = when - now;
    if( delta > 0 ) {
      fd_set r, w, e;
!     struct timeval tv = { delta, 0 };
      FD_ZERO(&r);
      FD_ZERO(&w);
      FD_ZERO(&e);
--- 35,45 ----
    int delta = when - now;
    if( delta > 0 ) {
      fd_set r, w, e;
!     struct timeval tv;
! 
!     tv.tv_sec = delta;
!     tv.tv_usec = 0;
!     
      FD_ZERO(&r);
      FD_ZERO(&w);
      FD_ZERO(&e);
>----------------------------------------------------------------<   

2. create a scsh/irix/signals1.c like this (almost identical to
   Solaris'):

>----------------------------------------------------------------<

/* Need to turn off synchronous error signals (SIGPIPE, SIGSYS). */

#include "../scsh_aux.h"

/* Make sure our exports match up w/the implementation: */
#include "../signals1.h"

/* This table converts Unix signal numbers to S48/scsh interrupt numbers.
** If the signal doesn't have an interrupt number, the entry is -1.
** (Only asynchronous signals have interrupt numbers.)
**
** Note that we bake into this table the integer values of the signals --
** i.e., we assume that SIGHUP=1, SIGALRM=15, etc. So this definition is
** very system-dependent.
*/
const int sig2int[] = {
        -1,             /* 0 is not a signal */
        scshint_hup,    /* 1: SIGHUP */
        scshint_keyboard,       /* 2: SIGINT */
        scshint_quit,   /* 3: SIGQUIT */
        -1,             /* 4: SIGILL */
        -1,             /* 5: SIGTRAP */
        -1,             /* 6: SIGABRT SIGIOT*/
        -1,             /* 7: SIGEMT */
        -1,             /* 8: SIGFPE */
        -1,             /* 9: SIGKILL */
        -1,             /* 10: SIGBUS */
        -1,             /* 11: SIGSEGV */
        -1,             /* 12: SIGSYS */
        -1,             /* 13: SIGPIPE */
        scshint_alarm,  /* 14: SIGALRM */
        scshint_term,   /* 15: SIGTERM */
        scshint_usr1,   /* 16: SIGUSR1 */
        scshint_usr2,   /* 17: SIGUSR2 */
        scshint_chld,   /* 18: SIGCHLD SIGCHD */
        scshint_pwr,    /* 19: SIGPWR */
        scshint_winch,  /* 20: SIGWINCH */
        scshint_urg,    /* 21: SIGURG */
        scshint_io,     /* 22: SIGIO SIGPOLL */
        -1,             /* 23: SIGSTOP */
        scshint_tstp,   /* 24: SIGTSTP */
        scshint_cont,   /* 25: SIGCONT */
        -1,             /* 26: SIGTTIN */       /* scshint_ttyin */
        -1,             /* 27: SIGTTOU */       /* scshint_ttyou */
        scshint_vtalrm, /* 28: SIGVTALRM */
        scshint_prof,   /* 29: SIGPROF */
        scshint_xcpu,   /* 30: SIGXCPU */
        scshint_xfsz    /* 31: SIGXFSZ */
        };

const int max_sig = 31; /* SIGXFSZ */
>----------------------------------------------------------------<

Cheers,
-- 
Kevin Esler                 Pure Atria
                            20 Maguire Road
Tel: (617) 676-2626         Lexington, MA 02173-3104
Fax: (617) 676-2600
mailto:esler@PureAtria.com  WWW: http://www.PureAtria.com/