Google Groups no longer supports new Usenet posts or subscriptions. Historical content remains viewable.
Dismiss

Wize BLT and Tcl 8.6.7

229 views
Skip to first unread message

Roger Oberholtzer

unread,
Nov 2, 2017, 9:39:20 AM11/2/17
to
I have been using BLT 2.5 from the Wize project (http://pdqi.com/w/pw/pdqi/Wize/Blt). It has been working on Linux and Windows up to and including Tcl/Tk 8.6.5.

I am now trying to use it with 8.6.7 (Windows 64-bit). It compiles fine. And the BLT package require works. But any call to a BLT command causes the shell to crash.

I am guessing something is different in 8.6.7 compared to 8.6.5. Is anyone else using the Wize BLT with 8.6.7?

I have been tracking the 3.0 series of BLT and many thing have been done. It compiles and I can do lots of things. But I don't think it is ready for use. The Wize BLT has been working fine. So I would be happy to try to continue using it.

Roger Oberholtzer

unread,
Nov 7, 2017, 4:49:48 AM11/7/17
to
After a bit more exploration, I see that the BLT problem is when it is compiled for 64-bit. When everything is so compiled, BLT fails. When I use all the exact same source versions, but compile for 32-bit, BLT works as expected.

Could it be that there is a duplicate data structure in the Wize BLT code that is not declared consistently with the real Tcl/Tk one? I know that the Wize project removed these duplicate structure declarations in BLT. Maybe something was missed?

Is anyone running Wize BLT 2.5 as a 64-bit program?

Roger Oberholtzer

unread,
Nov 7, 2017, 4:54:01 AM11/7/17
to
On Tuesday, November 7, 2017 at 10:49:48 AM UTC+1, Roger Oberholtzer wrote:

> After a bit more exploration, I see that the BLT problem is when it is compiled for 64-bit. When everything is so compiled, BLT fails. When I use all the exact same source versions, but compile for 32-bit, BLT works as expected.
>
> Could it be that there is a duplicate data structure in the Wize BLT code that is not declared consistently with the real Tcl/Tk one? I know that the Wize project removed these duplicate structure declarations in BLT. Maybe something was missed?
>
> Is anyone running Wize BLT 2.5 as a 64-bit program?

A bit more info: this 64-bit problem seem only to be on Windows. 64-bit BLT works fine on Linux (at least openSUSE).

Ashok

unread,
Nov 10, 2017, 5:16:03 AM11/10/17
to
It so happens I just started experimenting with RBC, which is derived
from the same code base (BLT) and also ran into the same issue on 64-bit
Windows. It requires some fixes including pointer->int truncation that
causes the crash. I am not through with it but at least does not crash
in my test case.

You can look at it at
https://github.com/apnadkarni/rbctoolkit/tree/65b2cb8fc99693c40389ddb148100d3c5b3924b0
and see if those changes work for you if applied to your BLT sources.

/Ashok

Ashok

unread,
Nov 10, 2017, 5:19:43 AM11/10/17
to
Sorry, the relevant link should be
https://github.com/apnadkarni/rbctoolkit/commit/1173739c55c8b4871e18804e15ada6e1be453dff

Roger Oberholtzer

unread,
Nov 30, 2017, 8:03:35 AM11/30/17
to
Okay. I guess I need to work through this to see where the problem might be. I have a suspicion that it is in the Windows-only code, as it seems to be working okay on 64-bit Linux. Of course, the problem code is probably in both.

I have to decide if it is better to spend time on the old code, or to spend it on the new BLT (3.0) to help move that along.
0 new messages