[Vm-dev] Re: [Pharo-project] UUID and Cog?

[Levente Uzonyi]

On Fri, 8 Oct 2010, David T. Lewis wrote:

> Moving to vm-dev list for follow up related to the UUIDPlugin.
>
> On Wed, Oct 06, 2010 at 04:37:00AM +0200, Levente Uzonyi wrote:
>> On Tue, 5 Oct 2010, David T. Lewis wrote:
>
> <unrelated discussion of Cog configurations snipped>
>
>>> As far as I know, there have been no reports of libuuid failures on
>>> the Unix VMs since Ian changed to using an internal UUIDPlugin, so
>>> this is an easy fix if it works for Cog also.
>>
>> If libuuid is not available, the internally built UUIDPlugin crashes the
>> VM.
>>
>> Levente
>
> Levente, thanks for identifying this. I was able to reproduce this on my
> system by removing the libuuid libraries, after which a VM with internal
> UUIDPlugin refuses to load:
>
> /usr/local/lib/squeak/4.3.4-2316/squeakvm: error while loading shared libraries: libuuid.so.1: cannot open shared object file: No such file or directory
>
> I reopened the issue on Mantis http://bugs.squeak.org/view.php?id=7358
> with the following explanation:
>
>> Changing status from resolved back to acknowledged. Levente Uzonyi
>> reports that the plugin, if built internally, will crash the VM if
>> the target system does not have libuuid installed.
>>
>> http://lists.gforge.inria.fr/pipermail/pharo-project/2010-October/033760.html [^]
>>
>> I reproduced this by removing the libuuid libraries from my Linux system.
>> The result is that the VM fails to load due to the missing library. It
>> never reaches main(), so this is not something that can be addressed in
>> the code. Presumably a static linked VM would work, but this would
>> probably lead to problems elsewhere.
>>
>> Summary: Building UUIDPlugin internally is a workaround for the libuuid
>> bug that is present on some systems, but it results in an unusable VM for
>> people who do not have the uuid library installed with their OS.
>
> Levente, can you say anything about what OS platforms would not have
> libuuid installed? I am guessing that it is a scenario involving a 64-bit
> OS for which some of the 32-bit runtime libraries were not installed, but
> if you can clarify this it would be helpful.

AFAIK 64-bit versions of Ubuntu 8.04, 8.10 and Debian 5.0 don't have a
32-bit package for libuuid. A relevant bug report can be found here: 
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=540014


Levente

>
> Thanks!
>
> Dave
>
>
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