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

[William Kenworthy]

On Sat, 2010-05-01 at 12:25 +0200, Kraus Philipp wrote:
>
> Am 01.05.2010 um 11:48 schrieb William Kenworthy:
>
> > On Sat, 2010-05-01 at 10:57 +0200, Kraus Philipp wrote:
> > >
> > > 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.
> > >
> > >
> >
> > Would LD_PRELOAD solve your problem? - worked for me when needing to
> > run
> > a legacy redhat app in the past on a more up-to-date gentoo system.
> >
>
>
> I think that can solve my problem, because it's only this one lib all
> other libs
> work very well.
>
> > There is also a LD_LIBRARY_PATH variable.  Get a binary copy of the
> > libs
> > you need and put em somewhere convenient and let the rest of the
> > system
> > stay as is.
>
>
> I don't have the glibc binary. I can't emerge it and if I try to
> compile from the sources.
> The configure script says: These critical programs are missing or too
> old: as ld
>
>
> How I can compile the from the sources
> (http://ftp.gnu.org/gnu/glibc/glibc-2.10.1.tar.gz) ?
>
>
> Thanks
>
>
> Phil

You can use ebuild to build a package, but not install it - then just
un-compress it and grab the wanted libs.  Or if you tell us what arch,
someone (me if its compatible) can create a binary pkg for you using
quickpkg.  It might also be on the livecd/install medium as well - dont
have one here to check.

BillK


-- 
William Kenworthy <billk@×××××××××.au>
Home in Perth!