shep@ALLSPICE.LCS.MIT.EDU (Tim Shepard) (07/12/89)
I'm on a 4.3BSD Vax.
I've been using gdb-2.8, I just got a copy of gdb-3.2.
I discovered that I am unable to set the variable _Xdebug in the X11
library when using gdb-3.2. I was able to do this under gdb-2.8.
This script below demonstrates the problem on some small source files.
-Tim
---------------------script below-----------------------
allspice<21>% cd /tmp
allspice<22>% cat y.c
#include <stdio.h>
int _Ydebug;
void y(a,b)
int *a;
int *b;
{
if (_Ydebug)
printf("*a = %d, *b = %d\n", *a, *b);
}
allspice<23>% cat foo.c
int main(argc,argv)
int argc;
char *argv[];
{
int i,j;
i = 0;
j = 1;
y(&i,&j);
return 0;
}
allspice<24>% cc -c y.c
allspice<25>% cc -g -o foo foo.c y.o
allspice<26>% gdb foo
GDB 2.8, Copyright (C) 1988 Free Software Foundation, Inc.
There is ABSOLUTELY NO WARRANTY for GDB; type "info warranty" for details.
GDB is free software and you are welcome to distribute copies of it
under certain conditions; type "info copying" to see the conditions.
Reading symbol data from /tmp/foo...done.
Type "help" for a list of commands.
(gdb) break main
Breakpoint 1 at 0x58: file foo.c, line 7.
(gdb) run
Starting program: /tmp/foo
Bpt 1, main (argc=1, argv=(char **) 0x7fffe800, 2147477512) (foo.c line 7)
7 i = 0;
(gdb) print _Ydebug
$1 = 0 '\000'
(gdb) set _Ydebug=1
(gdb) cont
Continuing.
*a = 0, *b = 1
Program exited normally.
(gdb) quit
allspice<27>% gdb-3.2 foo
GDB 3.2, Copyright (C) 1988 Free Software Foundation, Inc.
There is ABSOLUTELY NO WARRANTY for GDB; type "info warranty" for details.
GDB is free software and you are welcome to distribute copies of it
under certain conditions; type "info copying" to see the conditions.
Reading symbol data from /tmp/foo...done.
Type "help" for a list of commands.
(gdb) break main
Reading in symbols for foo.c...done.
Breakpoint 1 at 0x58: file foo.c, line 7.
(gdb) run
Starting program: /tmp/foo
Bpt 1, main (argc=1, argv=(char **) 0x7fffe800, 2147477512) (foo.c line 7)
7 i = 0;
(gdb) print _Ydebug
$1 = {int ()} 0x15c4
(gdb) set _Ydebug=1
Invalid cast.
(gdb) cont
Continuing.
Program exited normally.
(gdb) quit
allspice<28>%
------------------------end-of-script----------------------