Re: [eliz@is.elta.co.il: Termios support in the DJGPP port of GDB]

[Eli Zaretskii <eliz@gnu.org>]

>    1999-06-26  Eli Zaretskii  <eliz@is.elta.co.il>
> 
>            * inflow.c (tcgetpgrp, tcsetpgrp) [__DJGPP__]: Define away.
> 
> Rather than adding yet another ifdef to a generic file, I'd prefer to
> see #define macros added to a platform-specific file, for instance
> xm-go32.h

It turns out that DJGPP's unistd.h has a prototype fro these
functions, which makes it impossible to define them away in a header
included by defs.h.

The absence of these functions from the DJGPP library is actually a
bug; but until it is corrected, I added simple versions in go32-nat.c:

1999-08-19  Eli Zaretskii  <eliz@is.elta.co.il>

	* go32-nat.c (go32_stopped_by_watchpoint): Remove unused code.

1999-08-18  Eli Zaretskii  <eliz@is.elta.co.il>

	* go32-nat.c (tcgetpgrp, tcsetpgrp): New functions.


*** gdb/go32-nat.~13	Mon Aug 16 18:01:14 1999
--- gdb/go32-nat.c	Thu Aug 19 10:28:04 1999
*************** go32_stopped_by_watchpoint (int pid, int
*** 1093,1108 ****
  	  ret = D_REGS[i];
  	}
      }
- #if 0
-   /* Hardware breakpoints and data watchpoints utilize the same
-      machinery of debug registers, but the processor behaves
-      differently in these two cases: if we stopped at an instruction
-      breakpoint, the processor generates a fault-class exception,
-      whereby data breakpoint generates a trap.  Therefore, instruction
-      breakpoints need to increment the program counter.  */
-   if (!data_watchpoint && STATUS && !ret)
-     stop_pc += DECR_PC_AFTER_BREAK;
- #endif
  
    return ret;
  }
--- 1093,1098 ----
*************** _initialize_go32_nat (void)
*** 1345,1347 ****
--- 1335,1355 ----
    init_go32_ops ();
    add_target (&go32_ops);
  }
+ 
+ pid_t
+ tcgetpgrp (int fd)
+ {
+   if (isatty (fd))
+     return SOME_PID;
+   errno = ENOTTY;
+   return -1;
+ }
+ 
+ int
+ tcsetpgrp (int fd, pid_t pgid)
+ {
+   if (isatty (fd) && pgid == SOME_PID)
+     return 0;
+   errno = pgid == SOME_PID ? ENOTTY : ENOSYS;
+   return -1;
+ }