[Qgis-developer] Wiki page/area for 'Building QGIS from scratch'

[André William]

Hi all, my name is André, this is my first email on this list.

I've also struggled with building QGIS before, and besides the problems
mentioned by Mark, the default installed libraries are often incompatible
with QGIS or some of its dependencies.
I'd be willing to help with documenting my steps or possibly contributing
code to the scripts as I attempt to build on a clean OS.

André

2017-03-17 12:26 GMT-03:00 Matthias Kuhn <matthias at opengis.ch>:

> Hi Mark,
>
> Are the dependencies not available for your distribution?
>
> Except for some very special systems (Android, very old ubuntu versions
> on travis...) I never ever build these dependencies manually and just
> install them.
>
> Matthias
>
> On 03/17/2017 04:21 PM, Mark Johnson wrote:
> > For the last 10 days I have been attempting to build QGIS 3.0 master
> > from scratch.
> > For this QT 5 also had to be build, which is not an easy task.
> >
> > In the past I had used the 'run' scripts, which installed the source
> > - qt-opensource-linux-x64-5.7.1.run
> > but after the first installment I noticed that QGIS needed a modal that
> > had not been included: QtWebKit
> >
> > The there is QScintilla,PyQt5 (with sip) and Qwt
> > - Qwt: did not install the libs where PyQt5 could not find it
> > - QScintilla  did not accept the –-pyqt=PyQt5 parameter, so
> > the configure.py had to be adapted
> >
> > And then there is the cmake of QGIS3 itself, which in itself is a horror
> > dream come true
> > - instead of asking *once* for the 'Qt5 cmake' directory
> > -- it asks it about 12 times for the 17 modals needed
> > --> I assume ccmake determines for each module the dependencies, but for
> > the user this is a horrible -  time consuming experience
> >
> > ---
> > For this reason I think it would be a good idea to add an area in the
> > QGIS wiki with tip how this should be done,
> >
> > Based on a specific QGIS version
> > - which other versions (QT5, python3 [python 3.5.3rc1 does not work,
> > python 3.4.6 does] etc.) should be used
> > - basic howto's to
> > -- build QT5 from scratch (like using git that contains QtWebKit, as
> > apposed to the 'run' that does not)
> > -- known irregularities
> > ---> copy the Qwt/libs to the Qt5/libs so that PyQt5 can find them
> > ---> QScintilla how to adapt the configure.py script to create the
> > needed PyQt5 version
> >
> > The goal would be to offer a guideline for those doing this for the
> > first time
> > - avoiding known traps
> >
> > ---
> > Something in the form of (based on the present wiki):
> >
> > Organize an event
> > ...
> > Collaborative documents
> > ...
> > Building QGIS 3.0 from scratch
> >  Building QT 5 from scratch
> >    Building and correctly installing Qwt
> >    Building QScintilla for PyQt5
> >    Building PyQt5
> >  QGIS3 ccmake
> >
> > I would be willing to start this with my experiences.
> >
> > Mark Johnson, Berlin Germany
> >
> >
> >
> >
> >
> >
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