Demo program for elusive error in GPC - Gpc

5 Sep 2003


      Several weeks (perhaps even a month?) ago, I posted a note about a
problem I was having with GPC, under MacOS X, and repeatable under
IRIX.
The compiled program was incorrectly giving me a bus error, but
inserting an extra WRITELN somewhere would sometimes solve the problem.
 I have finaly put together an archive which consistantly demonstrates
the problem.
Since I have not yet decided firmly on a license for the program, I am
requesting that it be used only for helping to find the bug in GPC at
this time.  If you are interested in doing this, and wish to have
access to my archive, please eMail me offlist (fde101@yahoo.com) for a
copy.  Note that I do not consistantly check my mail on certain days of
the week, so it may take me a few days to reply.
To see the problem:
$ gunzip opas.tar.gz
$ tar xf opas.tar
$ cd opas
$ make
When the compile fails with a bus error, open 'debug.pas' in a text
editor, change the line:
{$DEFINE TRACE}
to:
{$UNDEF TRACE}
Save it, then:
$ make
After getting the same error (more quickly this time), change the
line back to {$DEFINE TRACE}, save it, and once more:
$ make
Now it goes through correctly, and my program actually works, too!
Strange.
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Frank D. Engel, Jr.
Modify the equilibrium of the vertically-oriented particle decelerator to result in the reestablishment of its resistance to counterproductive atmospheric penetration.
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