Initial GUD integration for Guile

[Jan Nieuwenhuizen <janneke@gnu.org>]

From Jan Nieuwenhuizen <janneke@gnu.org> # This line is ignored.
Subject: Initial GUD support for Guile
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Hi,

Here is an experimental patch for Guile to support GUD integration.  It
features a more friendly (more gdb-like) debug prompt for breakpoints
and stepping.  It has some rough edges, hopefully I overlooked some
simple things that can help clean it up.

Following is also its counterpart, a patch for Emacs' Grand Unified
Debugger (GUD).

I'm including gud-break.c that matches examples/gud-break.scm for
GUD (guile/gdb) operation comparison.

What do you think?

(There are of course more goodies to wish for after we can agree upon an
 initial integration).

Greetings, Jan




--- gud-break.c
/*
  Comparing GDB/GUD with experimental Guile/GUD support for Guile REPL
  gcc -g --std=c99 -o gud-break gud-break.c 
  gdb gud-break, or using GUD: M-x gdb RET gud-break RET
  b main
  r
  n
  RET # repeats last command: `n'
  ...
*/
#include <stdio.h>

int
main ()
{
  fprintf (stderr, "%s:%d:hello world\n", __FILE__, __LINE__);
  {
    int a;
    int b;
    a = 1;
    fprintf (stderr, "set: a=%d\n", a);
    b = 2;
    fprintf (stderr, "set: b=%d\n", b);
    {
      int c;
      int d;
      c = 3;
      fprintf (stderr, "set: c=%d\n", c);
      d = 4;
      fprintf (stderr, "set: d=%d\n", d);
    }
    fprintf (stderr, "%s:%d:leaving...\n", __FILE__, __LINE__);
  }
  fprintf (stderr, "%s:%d:goodbye world\n", __FILE__, __LINE__);
}
--- end

-- 
Jan Nieuwenhuizen <janneke@gnu.org> | GNU LilyPond http://lilypond.org
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