Re: [ptxdist] Using external toolchain with penguitronix BSP distribution

[Juergen Beisert <jbe@pengutronix.de>]

muntaqa wrote:
> Juergen Beisert <jbe@...> writes:
> > Out of curiosity: what advantage has your toolchain compared to our
> > OSELAS ARMv4 toolchain?
>
> This is CodeSourcery open source toolchain.  I had chosen it a while ago
> when building the project with buildroot.  I have been using it for a while
> and have built and debugged all of my applications with it on mini2440.  At
> this point, I did not want to discover or spend time on any other problems
> since I have a working system except that I am trying to add QT
> applications to my mini2440 platform.

Okay.

> Reason I switched to Pengutronix is that buildroot gave me some trouble
> when building QT thru it plus it had always given me kernel panic errors
> when installing the jffs2 root image (so I had been simply using tar balls
> on top of the stock kernel/rootfs that mini2440 is shipped with).  I
> thought switching to Pengutronix would finally let me burn a true image and
> I can organize my project much better.
>
> Currently, I still have kernel panic messages when building the rootfs
> using Pengutronix and CodeSourcery.  It seems perhaps that it is because of
> gcc 4.5.1 that is being used in my version of CodeSourcery.  When I use
> your toolchain, I can burn an image properly and do not receive kernel panic
> messages.  Your toolchain uses gcc 4.5.2.

Do all supported kernels show the same panic? Sometimes one kernel has trouble 
with a specific gcc version, and other kernels not. Did you try all kernels 
from the BSP with your CodeSourcery toolchain?

> One issue that I see though with Pengutronix is that any time I change a
> selection or add anything to QT configuration in Penguitronix ptxdist
> menuconfig, it rebuilds the whole QT (ends up costing me couple of hours
> plus I am not able to try anything quickly.)

On our new 24 core/96 GiB RAM machine Qt4 builds really quick in a few 
minutes. ;-)

Maybe you should start with a full blown Qt4, do your development with it, and 
when it is finished, you can try to shrink the library by disabling some of 
its options.

> I would like to start using pengutronix as long as it would be less
> frustrating than buildroot.

I don't know buildroot. I work with PTXdist since years.

> BTW, my best wishes to you on this project, you guys have done alot of
> good work and looking at your documentation the working environment, it
> seems very promising.

Thanks.

Regards,
Juergen

-- 
Pengutronix e.K.                              | Juergen Beisert             |
Linux Solutions for Science and Industry      | http://www.pengutronix.de/  |

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