Re: [gentoo-portage-dev] emerge -a @preserved-rebuild wants to rebuild dev-java/oracle-jdk-bin-1.8.0.45

[Zac Medico <zmedico@gentoo.org>]

On 04/23/2015 04:35 AM, Joakim Tjernlund wrote:
> On Wed, 2015-04-22 at 18:49 -0700, Zac Medico wrote:
>> On 04/22/2015 04:07 PM, Joakim Tjernlund wrote:
>>> emerge -a @preserved-rebuild
>>> [ebuild   Rf  ] dev-java/oracle-jdk-bin-1.8.0.45
>>>
>>> but this does not help, how can I see what @preserved-rebuild is looking for?
>>>
>>>   Jocke
>>>
>>
>> Probably ffmpeg/libav libraries. Here's a bug report:
>>
>> https://bugs.gentoo.org/show_bug.cgi?id=460468
> 
> Yes, that is it :)
> 
> I would really like to have some verbose mode to @preserved-rebuild which shows
> what lib(s) is/are causing a rebuild.

Usually the "!!! existing preserved libs" message suffices. For example,
I just hit the exact same issue and the output looked like this:

!!! existing preserved libs:
>>> package: media-video/libav-9.17
 *  - /usr/lib64/libavformat.so.54
 *  - /usr/lib64/libavformat.so.54.20.4
 *      used by
/opt/oracle-jdk-bin-1.8.0.45/jre/lib/amd64/libavplugin-54.so
(dev-java/oracle-jdk-bin-1.8.0.45)
 *  - /usr/lib64/libavcodec.so.54
 *  - /usr/lib64/libavcodec.so.54.35.0
 *      used by
/opt/oracle-jdk-bin-1.8.0.45/jre/lib/amd64/libavplugin-54.so
(dev-java/oracle-jdk-bin-1.8.0.45)

> Seems easy to fool @preserved-rebuild though, just did
>   emerge -C oracle-jdk-bin ffmpeg && emerge oracle-jdk-bin:1.7 oracle-jdk-bin:1.8 media-video/ffmpeg
> and now portage is happy even though noting is solved.

It should be easy to fool, since it should only trigger under the
specific circumstances where a package contains library with installed
consumers (and there are no alternative providers of the same library
installed).
-- 
Thanks,
Zac