Re: gcc 4.4 vs gcc 4.5 - a heads up

Is this an issue that could be monitored by adding an automated test? (Is
there any way to reproduce it using just a single compiler version, and/or
can it be tested using a single executable?)

Ryan

On Tue, Jun 21, 2011 at 8:23 AM, Nigel Atkinson <[email protected]>wrote:

> I've just tracked down an annoying problem that arises with moving from
> gcc 4.4 to gcc 4.5 - which might happen on Linux if you upgrade your
> distribution.
>
> The problem boiled down to a luabind lib compiled with 4.4 and my
> program with 4.5, which caused a subtle bug in the dynamic casting with
> some classes looking like their base class to Lua.  Not a bug with
> luabind per se, but something to watch out for.
>
> The solution was to re-compile luabind with gcc 4.5.  A fact I found
> when adding cout's to luabind to see how the cast graph and cache
> worked.
>
> If anyone is interested, I have a fairly small program that exhibits the
> problem.
>
> Nigel Atkinson
>
>
>
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-- 
Ryan Pavlik
HCI Graduate Student
Virtual Reality Applications Center
Iowa State University

[email protected]
http://academic.cleardefinition.com

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