On Jun 8, 2012, at 10:03 PM, Phil (list) wrote:
> On Jun 8, 2012, at 4:56 PM, Phil (list) wrote:
>
>> Having said that and made the change to openGLLibraryName, now I'm getting a
>> segfault on my first OpenGL call. I'm running Ubuntu 12.04 64-bit desktop
>> with 32-bit compat libs installed and running with proprietary X11/OpenGL
>> (fglrx) drivers and libgl1-mesa-dev installed... do I need to symlink the
>> library to a specific location or is there anything related to my
>> configuration that sounds like the culprit?
>>
>> Also, it finally dawned on me that I had too many variables in play
>> troubleshooting this while trying to do everything at once (i.e. using a
>> different vm/image/code) so I've installed Squeak 4.3 with the 'classic' VM
>> (though I'm open to using any combination of VM and image that helps sort
>> this out), using the current repo versions of FFI and OpenGL to try to keep
>> the troubleshooting as straightforward as possible.
>
> It turns out there are two flavors (builds) of the same VM and I picked the
> wrong one:
>
> VM obtained via Ubuntu Software Center download:
>
> squeakvm -version reports:
> 4.4.7-2357 #1 XShm Tue Apr 24 17:12:58 UTC 2012 gcc 4.6.3
> Linux yellow 2.6.24-29-server #1 SMP Tue Oct 11 15:57:27 UTC 2011 x86_64
> x86_64 x86_64 GNU/Linux
> plugin path: /usr/lib/squeak/4.4.7-2357/ [default:
> /usr/lib/squeak/4.4.7-2357/]
>
> Seg fault
>
> ===============================
>
> VM obtained via Squeak all-in-one:
>
> squeakvm -version reports:
> 4.4.7-2357 #1 XShm Sun Jan 23 18:17:31 PST 2011 gcc 4.3.2
> Linux vps2.piumarta.com 2.6.18-028stab053.10-ent #1 SMP Thu Feb 28 20:34:08
> MSK 2008 i686 GNU/Linux
> plugin path:
> /home/phil/Development/Smalltalk/phil-images/sq43/Squeak-4.3-All-in-One.app/Contents/Linux-i686/lib/squeak/4.4.7-2357/
> [default:
> /home/phil/Development/Smalltalk/phil-images/sq43/Squeak-4.3-All-in-One.app/Contents/Linux-i686/lib/squeak/4.4.7-2357/]
>
> Works
>
> Looks like the first one is a 64-bit build and the second 32-bit which would
> probably explain it.
OK, now that I had a working VM/image combo, I was able to make some further
progress...
One additional change I discovered I needed to make beyond
OpenGL-Core-bf.17.mcz was:
OGLUnix glExtGetProcAddress: aString
"Answer the function address for the given extension function."
<cdecl: ulong 'glXGetProcAddressARB' (char*) module: 'libGL.so.1'>
^self externalCallFailed
The module: param should still be GL for Unix systems but the
#openGLLibraryName parameter did not work (I assume that this call is not being
rewritten as the others are)
Now on to Cog VM...
osVersion is returning a different value under Cog so I had to modify:
OGLUnix openGLLibraryName
(Smalltalk osVersion = 'linux' or: Smalltalk osVersion = 'linux-gnu')
ifTrue: [ ^ 'libGL.so.1' ]
ifFalse: [ ^ 'GL' ].
Also, unlike the Squeak VM, Cog wasn't finding the OpenGL library so I had to:
ln -s /usr/lib/libGL.so.1 <plugin-dir>/libGL.so.1
So now I have OpenGL working on both the classic Squeak VM and Cog, but I'm now
back to my original problem re: Linux vs. other platforms w.r.t. OpenGL.
Fortunately, it appears someone has previously discovered and resolved the
issue via a VM change:
http://lists.squeakfoundation.org/pipermail/vm-dev/2012-June/010797.html
Hopefully this helps anyone else who might run into this on Linux.
Thanks,
Phil_______________________________________________
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