Review Request 127169: By default, make KDE_INSTALL_USE_QT_SYS_PATHS share the same directory scheme as Qt if they share the prefix

[Aleix Pol Gonzalez]

> On Feb. 24, 2016, 8:06 p.m., Stephen Kelly wrote:
> > Hi Aleix,
> > 
> > I'm not familiar with the 'tiny mess'. Can you say what it is? I would expect the libs go in the same place, but maybe the plugins are affected by this? Can you be more specific?
> > 
> > Thanks,
> 
> Aleix Pol Gonzalez wrote:
>     Well, Qt might be installing things in `$prefix/lib` and cmake in `$prefix/lib64`. In fact, Qt by default installs plugins in `$prefix/plugins` (which looks really odd, I agree).
>     In any case, if it's meant to go to the same place, let's just ask Qt where to go.
>     
>     As you can see, all of the distros are already specifying this: (and they don't need to in fact, because it's the same prefix)
>     https://projects.archlinux.org/svntogit/packages.git/tree/trunk/PKGBUILD?h=packages/kcoreaddons
>     http://bazaar.launchpad.net/~ubuntu-branches/ubuntu/wily/pkg-kde-tools/wily/view/head:/datalib/kf5_flags
>     https://pkgs.fedoraproject.org/cgit/rpms/kf5.git/tree/macros.kf5
> 
> Nicolás Alvarez wrote:
>     I don't think "all distros set it" is a valid argument for changing a default, otherwise we would be setting `CMAKE_INSTALL_PREFIX=/usr` by default too.
> 
> Stephen Kelly wrote:
>     I agree with Nicolás that this seems wierd. Are packagers complaining about having to set this?
>     
>     Also, I don't think I've seen enough specifics about the impact this has. What moves where etc.

99% of our users use a setting that we don't enable by default? It's definitely something to take into account.

In fact, if the creator of a system decided that Qt plugins go to /usr/heaven/plugins, I don't really see why we should override the decision and ask the user to configure each project specifically. I understand this wouldn't make sense if they weren't sharing a prefix, as it's a complete different thing.

An example is my installation. Qt decided to put the plugins in `$prefix/lib/plugins`, cmake/ecm decides to put them in `$prefix/lib64/plugins`. I get 2 Qt plugin directories for no reason.


- Aleix


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On Feb. 24, 2016, 6:09 p.m., Aleix Pol Gonzalez wrote:
> 
> -----------------------------------------------------------
> This is an automatically generated e-mail. To reply, visit:
> https://git.reviewboard.kde.org/r/127169/
> -----------------------------------------------------------
> 
> (Updated Feb. 24, 2016, 6:09 p.m.)
> 
> 
> Review request for Extra Cmake Modules, KDE Frameworks and Albert Vaca Cintora.
> 
> 
> Repository: extra-cmake-modules
> 
> 
> Description
> -------
> 
> Make Qt and ECM-based projects use the same directory sctructure (i.e. where plugins are, libs, etc.) by default. Otherwise it creates a tiny mess that might be controlled but usually won't.
> 
> In the end, otherwise, people need to keep adapting their systems with environment variables anyway. All distros end up setting always this setting as ON, as well as brave developers who don't have separate prefixes for Qt and KDE.
> 
> 
> Diffs
> -----
> 
>   kde-modules/KDEInstallDirs.cmake ebd48fa 
> 
> Diff: https://git.reviewboard.kde.org/r/127169/diff/
> 
> 
> Testing
> -------
> 
> 
> Thanks,
> 
> Aleix Pol Gonzalez
> 
>

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