Re: Re: Cross-Compiled ORBit2 has Errors in Glib

[<lgust verizon net>]

Hi Michael,

Thank you for your suggestions. I appreciate the help I have received from the members of the orbit-list email. While investigating this problem, our team discovered that the gcc cross-compiler we are using needed an additional compilation flag: -mbig-endian.

After I built all the shared libraries and compiled the echo program with the -mbig-endian flag, the echo program ran on our target ARM processor. I don't understand how the original version of the echo program started when I didn't have the big/little-endian property set correctly.

I plan to document the hacking I had to do to cross compile ORBit2 and its dependent packages. If some engineer has to cross compile ORBit2 to run on the ARM processor in the future, I would like to save them weeks of hacking. Would zipping up a description document and the patch files I created and submitting the zipped file as an attachment to this email list be a good way of archiving this information?

Regards,
Larry S. Gustafson

> 
> From: Michael Meeks <michael@ximian.com>
> Date: 2003/11/13 Thu AM 07:31:48 CST
> To: lgust@verizon.net
> CC: orbit <orbit-list@gnome.org>
> Subject: Re: Cross-Compiled ORBit2 has Errors in Glib
> 
> Hi Larry,
> 
> On Wed, 2003-11-12 at 04:23, lgust@verizon.net wrote:
> > Has anyone seen a similar problem to the Segmentation fault described below?
> 
> 	Yes - sometimes when you don't do a g_type_init this sort of thing
> happens - but we do that in linc2/src/linc.c so ...
> 
> >  Do you have any ideas of how I might solve it?
> 
> 	Get a stack trace from the first warning (break point in g_logv) and
> have a dig around. I suspect it may be related to GType sizes. The GType
> type has to be a pointer type size - and there are a number of int <->
> pointer type cast things going on in the background. Possibly that's
> running into ARM's cunning integer handling (?).
> 
> > This error appears to originate in the call to
> > 
> > orb = CORBA_ORB_init(&argc, argv, "orbit-local-orb", &ev);
> 
> 	Right; we need a trace really. clearly everything works fine here :-)
> Another thing that may cause you grief, and is crucial to get right for
> the ORB to work is:
> 
> 	ORBit2/include/orbit/orbit-config.h
> 
> 	includes a load of ORBIT_ALIGNOF_CORBA_FLOAT - and that sort of thing,
> that is highly platform specific, and has to be right for ORBit2 to work
> at all on your architecture.
> 
> 	HTH,
> 
> 		Michael.
> 
> -- 
>  michael@ximian.com  <><, Pseudo Engineer, itinerant idiot
> 
>