[Qgis-user] sip-api-11.2 and qtbase-abi-5-5-1 prevent installing qgis 2.99 nightly on kde neon / ubuntu 16.04

[Jason Paul Joines]

---------------------------------Original-Message---------------------------------
> Date: Sun, 31 Dec 2017 02:13:49
> From: Andre Joost <andre+joost-Xv0xCBoRcaZkYx7DZD8BGw at public.gmane.org>
> To: qgis-user-qjLDD68F18NyQMAyxoHuMA at public.gmane.org
> Newsgroups: gmane.comp.gis.qgis.user
> Subject: Re: sip-api-11.2 and qtbase-abi-5-5-1 prevent installing qgis 2.99
>     nightly on kde neon / ubuntu 16.04
> 
> Am 31.12.2017 um 02:19 schrieb Jason Paul Joines:
>
>> #
>>
>>          I also have a newer version of python-sip, which is supposed to
>> provide sip-api-11.2:
>>
>> # dpkg -l python-sip
>> Desired=Unknown/Install/Remove/Purge/Hold
>> |
>> 
> Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
>>
>> |/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
>> ||/ Name                                               Version
>> Architecture                   Description
>> 
> +++-==================================================-==============================-==============================-=========================================================================================================
>>
>> ii  python-sip 4.19.2+dfsg-1+16.04+xenial+bui
>> amd64                          Python/C++ bindings generator runtime
>> library
>
> I guess the newer version spoils your installation. My Xenial 
> installation is build against python-sip 4.17 from the main ubuntu repo, 
> and works fine.
>
> It might be that python-sip 4.19.2 includes a different version of 
> sip-api, which is of no use for you.
>
> Try to downgrade python-sip, and libqt5core5a as well, which comes as 
> 5.5.1 from the main repo for me.
>
> If KDE Neon does not provide it, try to force the main ubuntu repo version.
>
> HTH,
> Andre Joost
>
>
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         I did downgrade python-sip to version 4.17+dfsg-1build1 from the 
main Ubuntu repositories.  I still get the same error at qgis install 
about sip-api-11.2 having no installation candidate.

         Downgrading libqt5core5a would require downgrading my entire 
desktop.  I'm not willing to do that.

         Perhaps I could rebuild both libqt5core5a and python-sip so that 
they will both claim to provide the missing virtual packages even in their 
current versions.


Jason
===========