[Gammaray-interest] Fwd: building GammaRay on OS X

[Volker Krause]

On Thursday 28 May 2015 16:47:44 Allen Winter wrote:
> On Thursday, May 28, 2015 10:11:47 PM René J.V. Bertin wrote:
> > On Thursday May 28 2015 11:14:54 Volker Krause wrote:
> > 
> > Hi,
> > 
> > > Yep, GAMMARAY_PROBE_ONLY_BUILD.
> > 
> > That seems to work, but I had to remove the whole VTK-scanning section
> > from the toplevel Makefile to be able to build the Qt4 probe with
> > GammaRay and VTK built and installed for Qt5. It looks like VTK's
> > CMakeFiles set and export flags that signal that Qt5 has been found. I'm
> > not sure if there's an elegant way to get around that (move the VTK
> > section to before the Qt section?) other than unsetting all the offending
> > Qt5 flags if ENFORCE_QT4 is true. If the probe itself doesn't link to VTK
> > you could probably skip the VTK section if PROBE_ONLY_BUILD is set?
> interesting.  we had a similar bug report recently for a Windows build that
> got hit by the VTK stuff. but I think he had the opposite; ie. if VTK is
> found then a Qt4 build was forced..
> 
> looking at the bottom of /usr/lib64/cmake/vtk/VTKConfig.cmake I see:
> SET(VTK_QT_VERSION "4")
> 
> seems we need to check VTK_QT_VERSION in our top-level CMakeLists.txt then.
> if building with qt5 and VTK_QT_VERSION is 4, then we turn-off vtk support
> and vice-versa
> 
> oh, another trick you can use to turnoff VTK is
> passing -DCMAKE_DISABLE_FIND_PACKAGE_VTK=True to cmake

Considering VTK keeps causing confusion and build issues, for a very very 
niche Qt4-only feature, how about we disable that by default in general?

Kevin, would you be ok with that?

regards,
Volker

-- 
Volker Krause | volker.krause at kdab.com | Senior Software Engineer
KDAB (Deutschland) GmbH&Co KG, a KDAB Group company
Tel. +49-30-521325470
KDAB - The Qt Experts
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