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lagalopex
Guru
Joined: 16 Oct 2004
Posts: 423
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 Posted: Thu Dec 20, 2007 4:47 pm Post subject: downgrade glibc |
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Hi!
I tried to downgrade glibc-2.6.1 to the "latest" 2.5 version. Question is how...
Is there a "proofed" way to safely downgrade glibc? (Also perhaps dangerous or comlicated way...)
Of course I searched the forums and know of the build-in blocker for current glibcs regarding downgrades.
Would it be possible to copy the old glibc and put the dirs in the ldpath? Or is the dynamic linker/loader then broken aswell?
Reinstall is no option!
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cyrillic
Watchman
Joined: 19 Feb 2003
Posts: 7301
Location: Groton, Massachusetts USA
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| Posted: Thu Dec 20, 2007 6:45 pm Post subject: Re: downgrade glibc |
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| lagalopex wrote: | | I tried to downgrade glibc-2.6.1 to the "latest" 2.5 version. Question is how... |
No, the real question is why ?
There probably is some complicated way to downgrade glibc, but reinstalling would be easier and faster. |
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SLBMEH
Apprentice
Joined: 16 Aug 2003
Posts: 299
Location: Pittsburgh, PA
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| Posted: Sat Dec 22, 2007 6:17 am Post subject: |
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I've done it in the past, trust me... Reinstall... It will save you days... End result will probably be a new install anyhow because your system ends up broken...
If you must know, you need to start out building a new downgraded toolchain... then you have to rebuild that toolchain with that toolchain... Then you pretty much do the same steps as changing your chost...
http://gentoo-wiki.com/HOWTO_change_CHOST_relatively_safely
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lagalopex
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Joined: 16 Oct 2004
Posts: 423
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| Posted: Mon Dec 24, 2007 2:09 am Post subject: |
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Well, I now tried it.
I quickpkg'ed glibc, unpacked it to /opt/glibc , added the paths (/opt/glibc/lib:/opt/glibc/lib64:/opt/glibc/usr/lib64:/opt/glibc/lib32:/opt/glibc/usr/lib32) to $LDPATH and ran env-update, sourced /etc/profile.
After that I masked newer glibc and downgraded from 2.6.1 to 2.5-r4. Than I rebuilt system twice and world once.
Worked like a charme.
I tried to check for some problems... unfortunatelly I'll need to downgrade to 2.4-r4... 
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SLBMEH
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Joined: 16 Aug 2003
Posts: 299
Location: Pittsburgh, PA
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| Posted: Mon Dec 24, 2007 8:34 pm Post subject: |
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You're the third person I've seen ask about downgrading after I needed to do it. Perhaps a guide needs to be made.
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lagalopex
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Joined: 16 Oct 2004
Posts: 423
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| Posted: Sun Dec 30, 2007 2:42 am Post subject: |
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The downgrade to 2.4-r4 worked as well.
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SLBMEH
Apprentice
Joined: 16 Aug 2003
Posts: 299
Location: Pittsburgh, PA
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| Posted: Sat Jan 19, 2008 9:56 pm Post subject: |
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I added an entry to the wiki.
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