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Re: 2.4 / 2.5 compatibility?


On Thu, Jun 25, 2009 at 15:15, Mike Frysinger<vapier@gentoo.org> wrote:
> On Thursday 25 June 2009 16:11:34 David Morris wrote:
>> I'm working on a project to get a large suite of software compile on
>> SuSE 10 (glibc 2.4) running on RedHat 5.3 (glibc 2.5). ?Recompiling
>> the software must be avoided if at all possible.
>>
>> The software seems to run with no problems, though we have only tested
>> a tiny fraction of the functionality. ?However, I (and others I have
>> talked to) have the impression that running with a different version
>> of glibc than software was compiled against is a "Bad Thing (tm)".
>>
>> Anyone know if there are any problems we can expect? ?Or am I mistaken
>> that there is a glibc version compatibility problem?
>
> your understanding isnt 100% complete, but it's fairly close. ?building code
> against one version of glibc and then attempting to use it under an *older*
> glibc is not going to work (well, it might accidentally work, but it is
> absolutely not supported). ?going the opposite way however -- building code
> against one version and using it under a *newer* version -- is absolutely
> supported and should always work. ?if it doesnt work, then it's a bug and you
> should report it. ?it might be that said bug has already been fixed in even
> newer versions of glibc, in which case do not expect anything older to be
> fixed. ?HTH.
> -mike
>

Thank you for the clarification Mike!  I (and a few others) were
apparently led astray by second-hand horror stories....which I'm
guessing based on the above, were going the reverse direction.

--David


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