[Paraview] ParaView and Qt 5

[Shawn Waldon]

Hi Mark,

CMake uses different variables to find Qt4 vs Qt5.  QT_QMAKE_EXECUTABLE is
the Qt4 variable and is ignored by the code to find Qt5.  The variable you
want is: -DQt5_DIR=/software/path/qt-5.7.1/lib/cmake/Qt5

HTH,
Shawn

On Wed, Jan 18, 2017 at 3:16 PM, Mark Olesen <Mark.Olesen at esi-group.com>
wrote:

> I'm trying to compile a paraview using a Qt5 (5.7.1) that I've compiled
> with '-qt-xcb' to avoid too many dependencies. When compiling paraview (git
> version), I supposed that the following would be sufficient to convey which
> qt to use:
>
> cmake -DPARAVIEW_BUILD_QT_GUI=ON -DQT_QMAKE_EXECUTABLE:
> FILEPATH=/software/path/qt-5.7.1/bin/qmake
> -DPARAVIEW_QT_VERSION:STRING=5  ...
>
> However, the find_package(Qt5) locates the system Qt and its cmake file,
> which bombs out:
>
> CMake Error at CMake/ParaViewQt.cmake:65 (find_package):
>   Could not find a configuration file for package "Qt5" that is compatible
>   with requested version "5.6".
>   The following configuration files were considered but not accepted:
>     /usr/lib64/cmake/Qt5/Qt5Config.cmake, version: 5.5.1
>     /usr/lib64/cmake/Qt5/Qt5Config.cmake, version: 5.5.1
> Call Stack (most recent call first):
>   Qt/Widgets/CMakeLists.txt:200 (pv_find_package_qt)
>
>
> Which config variables am I missing?
>
> Thanks,
> /mark
> ________________________________________
> From: ParaView <paraview-bounces at paraview.org> on behalf of Utkarsh
> Ayachit <utkarsh.ayachit at kitware.com>
> Sent: Monday, January 16, 2017 7:51:36 PM
> To: ParaView Developers
> Cc: ParaView
> Subject: [Paraview] ParaView and Qt 5
>
> Folks,
>
> With upcoming release (5.3), we plan to move to using Qt 5 by default.
> Qt 5 has been out since 2012 and it is well supported on modern
> platforms. ParaView will continue to build with Qt 4 until further
> notice, but we highly recommend custom application developers and
> plugin developers to move to Qt 5 at the earliest since active
> development and testing for ParaView will happen with Qt 5.
>
> Changes [1] that landed in master earlier today update ParaView to now
> use QOpenGLWidget for rendering which creates a frame buffer object to
> do all the rendering in. If you have custom mapper or rendering code
> that assumed it was rendering to the default onscreen frame buffer, it
> will not work correctly and will need to be updated. Please use the
> mailing, if you encounter any such issues. For everything else, the
> changes should be fairly transparent except in exceptions documented
> here [2].
>
> In the upcoming weeks, we will update the superbuild and dashboards to
> build and test using Qt 5.
>
> Thanks,
> Utkarsh
>
>
> [1] https://gitlab.kitware.com/paraview/paraview/merge_requests/1279
> [2] https://gitlab.kitware.com/paraview/paraview/blob/master/
> Utilities/Doxygen/pages/MajorAPIChanges.md#changes-in-53
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