Re: [gentoo-user] glibc - C preprocessor "/lib/cpp" fails sanity check

[Alan McKinnon]

On Sunday 21 December 2008 21:09:33 Jeff Cranmer wrote:
> On Sunday 21 December 2008 01:49:41 pm Justin wrote:
> > Jeff Cranmer schrieb:
> > >> Hmm, if you have a separate machine with the same architecture, you
> > >> can build those binary packages yourself, just man emerge and take a
> > >> look at the buildpkg section. Alternatively, you can cross compile
> > >> binary packages[1].
> > >>
> > >> Or, why not just use a stage tarball?
> > >>
> > >> HTH.
> > >>
> > >> Joe
> > >>
> > >> [1] http://www.gentoo.org/proj/en/base/embedded/cross-development.xml
> > >
> > > I'm not an expert, and I don't have a second amd64 machine.  My laptop
> > > runs a different PC processor type.  How would I go about
> > > cross-compiling an amd64 binary on my laptop, and creating the
> > > necessary .tbz2 tarball. If I could do that, I would probably be able
> > > to test out the theory that this would fix my broken system.
> > >
> > > Thanks
> > >
> > > Jeff
> >
> > Perhaps you should go back to a lower glib version. Latest versions of
> > such important packages might always have issues.
>
> What is the approved way to do this?

There is no approved way to downgrade glibc. The output message from the error 
you posted tells you why the devs will not provide you with a method to do 
it. If you *really* want to do it, your could comment out the "if" statement 
between lines 159 and 163 of the latest glibc ebuild.

The only correct way I know of is to perform a reinstall. It'll probable be 
quicker, easier and far less painful than trying to recover from ripping the 
foundation out from under your OS...


However, did you notice that the parent poster mentioned glib and you have 
attempted to downgrade glibc?


-- 
Alan McKinnon
Systems Engineer
Infrastructure Services
Internet Solutions

[phone]


>
> When I tried to install an old version of glibc from a binary, I got the
> error:
>
> The error was
> * Sanity check to keep you from breaking your system:
>  *  Downgrading glibc is not supported and a sure way to destruction
>  *
>  * ERROR: sys-libs/glibc-2.6.1 failed.
>  * Call stack:
>  *               ebuild.sh, line   49:  Called pkg_setup
>  *             environment, line 3275:  Called die
>  * The specific snippet of code:
>  *               die "aborting to save your system";
>  *  The die message:
>  *   aborting to save your system
>  *
>  * If you need support, post the topmost build error, and the call stack if
> relevant.
>  * A complete build log is located
> at '/var/tmp/portage/sys-libs/glibc-2.6.1/temp/build.log'.
>  * The ebuild environment file is located
> at '/var/tmp/portage/sys-libs/glibc-2.6.1/temp/environment'.
>
> The error message
> "Downgrading glibc is not supported and is a sure way to destruction"
> makes me think that going back would not be such a good idea.
>
> Jeff
-- 
alan dot mckinnon at gmail dot com