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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. |
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On 22 August 2017 13:53:35 EEST, Dale <rdalek1967@×××××.com> wrote: |
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>Raffaele Belardi wrote: |
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>> On Fri, 2017-08-18 at 09:00 +0200, Raffaele Belardi wrote: |
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>>> I hava a build problem upgrading Mythtv to 0.28.1-r1 [1] on an |
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>~amd64 |
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>>> system. The problem is related to a glibc API change [2] introduced |
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>>> in |
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>>> glibc-2.24 and still present in glibc-2.25. So I'm thinking to try |
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>>> the |
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>>> build with an older glibc version. |
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>>> |
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>>> Downgrading the system to glibc to 2.23-r3 means trouble? |
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>>> If not, an emerge @preserved-rebuild after the downgrade will be |
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>>> sufficient to not break the rest of the system? |
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>>> I suppose a quickpkg of the whole world before the downgrade would |
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>be |
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>>> a |
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>>> good idea, just in case... |
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>>> |
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>>> thanks, |
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>>> |
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>>> raffaele |
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>>> |
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>>> |
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>>> [1] https://bugs.gentoo.org/show_bug.cgi?id=604430 |
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>>> [2] https://bugs.gentoo.org/show_bug.cgi?id=575232 |
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>> Just as follow up, inspired by [2] I fixed the mythtv build issue by |
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>> adding #include <sys/sysmacros.h> to videosource.cpp and continuing |
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>the |
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>> build with ebuild instead of emerge. |
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>> |
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>> raffaele |
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>> |
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>> |
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> |
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>Just a FYI, some have been able to downgrade and it work. However, you |
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>have to be prepared for that beforehand I think. I've seen it posted |
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>before but can't recall WHO it was. I was hoping they would reply but |
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>either they didn't see your post or they are no longer subscribed. |
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> |
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>While it may be possible, it is risky and not recommended. It's one |
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>thing that I wish they had a known path to downgrade for. It's one of |
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>those, you don't know it's going to break something until it does and |
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>you have little or no options. |
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> |
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>Glad you got a workaround tho. Maybe some more info will pop up later. |
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> |
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>Dale |
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> |
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>:-) :-) |
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|
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-- |
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Sent from my Android device with K-9 Mail. Please excuse my brevity. |
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