[Qgis-developer] Building QGIS2.99 cloned from GitHub on Ubuntu 17.04 (zesty) 64-bit Python

[gordon at shieldaig.com]

Just today I made a little progress after numerous upgrades applied to 
Ubuntu 17.04.

There are several issues on my "messy" Ubuntu system  - and probably not 
on other Linux flavours.

This error seems odd, I hadn't seem it before, is there a fix?

`[ 88%] Building CXX object 
tests/src/gui/CMakeFiles/qgis_attributeformtest.dir/qrc_images.cpp.o
/home/gordon/dev/cpp/QGIS/build-master/python/gui/sip_guipart3.cpp:2929:7: 
error: deleted function ‘virtual 
sipQgsFileDownloader::~sipQgsFileDownloader()’

        ^
In file included from 
/home/gordon/dev/cpp/QGIS/python/gui/qgsfiledownloader.sip:33:0:
/home/gordon/dev/cpp/QGIS/python/../src/gui/qgsfiledownloader.h:99:5: 
error: overriding non-deleted function ‘virtual 
QgsFileDownloader::~QgsFileDownloader()’
      ~QgsFileDownloader();`

The other error, I am working on, after bringing up QGIS.

`version `Qt_5.8' not found (required by 
/usr/local/lib/python3.5/dist-packages/PyQt5/QtCore.so)`

I can install PyQt5.7.1 built using Qt5.7.1.  Hopefully that will work.  
As it will be built with Qt5.7.1.

It has made me wonder how many "cores" were used to build pre-packaged 
libraries, anyone know?


Qt5.8, is not possible for me without completely rebuilding libraries 
which are prebuilt with an out-of-date Unicode `libicu` version 57 and 
building from source has errors due to new icu version 58 not being 
picked up.  I am not attempting that.

Gordon


On 2017-02-12 12:01, gordon at shieldaig.com wrote:
> In summary, the apparent issue seems to have resulted from using `sudo
> pip3 install PyQt5` at some point as the latest version of it depends
> on Qt 5.7.1 while `sudo apt-get install python3-pyqt5` depends on Qt
> 5.6.1 and the symbolic link to `libQt5Core.so.5` points to 5.6.1.
> 
> Simply removing and purging packages and reinstalling does not easily
> correct this.
> 
> The observations regarding building using Qt 5.7.1 are still valid and
> don't seem to affect building using Qt 5.6.1.
> 
> Gordon