Re: [gentoo-user] two glibcs with different version

[Kraus Philipp]

On 01.05.2010 um 10:32 wrote Volker Armin Hemmann:

> On Samstag 01 Mai 2010, Graham Murray wrote:
>> Kraus Philipp <philipp.kraus@×××××××××.de> writes:
>>> Hello,
>>>
>>> I must test a software with a older version of the glibc. I run the
>>> 2.11.1 now but for one tool I need a previous version (2.6.1).
>>> How can I compile the glibc without changing my system glibc. I
>>> would
>>> like to set the previous glibc with the LD_PATH.
>>> Can I run two different versions or is a better solution to
>>> downgrade
>>> the system glib?
>>
>> I think that the only way you can do this is to create a chroot jail,
>> in which you build everything using the old version of glibc (in a
>> very
>> similar way to building a new Gentoo system) and run your
>> application in
>> that.
>
> no, you can install glibc in /usr/local and then tell apps to either
> use the
> libs in /usr/local or /usr.
>
> It is just not easy because it easily breaks stuff in horrrible to
> fix ways.

Okay, can I downgrade my glibc? My Gentoo isn't a big system, it's a  
server
installation, so I can recompile the whole system. I had forgotten to  
mask the
glibc on the last update. I have add a line to the portage.mask but  
emerge says
that it can't compile the older version, because will damage the system.