Bug#784515: [qlandkartegt] Qt4's WebKit removal

[Sebastiaan Couwenberg]

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Hi Lisandro,

Thanks for looking into the OpenGL issue on arm{el,hf}.

On 05/08/2015 01:24 AM, Lisandro Damián Nicanor Pérez Meyer wrote:
> On Wednesday 06 May 2015 15:45:27 Sebastiaan Couwenberg wrote:
>> The first revision is available in experimental, but it fails to
>> build on armel & armhf due to an OpenGL issue that the other
>> architectures don't suffer from.
>> 
>> I've haven't had the time to reproduce the issue on a porterbox,
>> hopefully it specific to the package mix in experimental and
>> doesn't affect unstable, so we can get the Qt5 port of
>> qlandkartegt in unstable soon.
> 
> Hi Bas! I checked the code and the problem is that GLU
> (<OpenGL/glu.h>) is not supported/does not supports OpenGL ES,
> which is the native OpenGL mode on those two archs.
> 
> In this case let me recommend you to limit qlandkartegt to build on
> !armel !armhf and ask for the binaries to be removed on those archs
> when you push the package to unstable.
> 
> Of course a much better solution is to port the code away from Glu,
> but that requires more manpower :-/ . On the other hand porting the
> code means it will be possible to run it on quite more embedded
> devices in a native (non software emulated) way.

I don't quite understand why this issue pops up with Qt5 only.

Does Qt5 not use OpenGL on arm{el,hf} where Qt4 does?

The qlandkartegt build failures are caused by CMake being unable to
find the OpenGL library.

libqt4-opengl-dev used to pull in the opengl dependencies:

 libgl1-mesa-dev | libgl-dev, libglu1-mesa-dev

libqt5opengl5-dev only depends libqt5opengl5 & qtbase5-dev.

libqt5opengl5 does depend on libgl1-mesa-glx | libgl1 but not
libglu1-mesa-dev.

The CMake error leads me to believe it may just be missing dependencies.

Kind Regards,

Bas

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