Re: [gentoo-user] Re: downgrading glibc

[Neil Bothwick]

On 22 August 2017 14:09:39 EEST, Dale <rdalek1967@×××××.com> wrote:
>It may have been you but I was thinking either Walter or Duncan but not
>sure.  It could be, I read it on -dev too.  I'm just not sure who it
>was
>just know it is gentoo related, since Gentoo is all I'm subscribed to.
>
>One would think there would be some method to downgrade that is known
>to
>work and documented.  It can be done for lots of other very important
>packages but this one, not so much.  To me, it's just odd.
>
>At least the OP found a fix tho.  < whew >
>
>Dale
>
>:-)  :-)
>
>P. S. Top posting since Neil seems to be on some device that started
>it.  :-D
>
>
>Neil Bothwick wrote:
>> I did it once, some years ago. AFAIR I commented out the version che
>k
>> in, i think, the glibc-toolchain eclass then emerged the older
>> version. Just make sire you have a binary package of the current
>> version that you can unpack in / if things go wrong.
>>
>> On 22 August 2017 13:53:35 EEST, Dale <rdalek1967@×××××.com> wrote:
>>
>>     Raffaele Belardi wrote:
>>
>>         On Fri, 2017-08-18 at 09:00 +0200, Raffaele Belardi wrote:
>>
>>             I hava a build problem upgrading Mythtv to 0.28.1-r1 [1]
>>             on an ~amd64 system. The problem is related to a glibc
>API
>>             change [2] introduced in glibc-2.24 and still present in
>>             glibc-2.25. So I'm thinking to try the build with an
>older
>>             glibc version. Downgrading the system to glibc to 2.23-r3
>>             means trouble? If not, an emerge @preserved-rebuild after
>>             the downgrade will be sufficient to not break the rest of
>>             the system? I suppose a quickpkg of the whole world
>before
>>             the downgrade would be a good idea, just in case...
>>             thanks, raffaele [1]
>>             https://bugs.gentoo.org/show_bug.cgi?id=604430 [2]
>>             https://bugs.gentoo.org/show_bug.cgi?id=575232
>>
>>         Just as follow up, inspired by [2] I fixed the mythtv build
>>         issue by adding #include <sys/sysmacros.h> to videosource.cpp
>>         and continuing the build with ebuild instead of emerge.
>raffaele
>>
>>
>>
>>
>>     Just a FYI, some have been able to downgrade and it work.
>However, you
>>     have to be prepared for that beforehand I think.  I've seen it
>posted
>>     before but can't recall WHO it was.  I was hoping they would
>reply but
>>     either they didn't see your post or they are no longer
>subscribed.
>>
>>     While it may be possible, it is risky and not recommended.  It's
>one
>>     thing that I wish they had a known path to downgrade for.  It's
>one of
>>     those, you don't know it's going to break something until it does
>and
>>     you have little or no options.
>>
>>     Glad you got a workaround tho. Maybe some more info will pop up
>later.
>>
>>     Dale
>>
>>     :-)  :-)
>>
>>
>> --
>> Sent from my Android device with K-9 Mail. Please excuse my brevity.

:P
-- 
Sent from my Android device with K-9 Mail. Please excuse my brevity.