Review Request 129025: Enable cross compilation support for packages depending on normally installed kdoctools tools.

[Ralf Habacker]

> On Sept. 26, 2016, 4:25 nachm., Aleix Pol Gonzalez wrote:
> > Again, I'll refer to how it's done in KCoreAddons. I don't think it's really useful to need to define variables for every framework you are compiling.
> 
> Luigi Toscano wrote:
>     Is this last sentence part of another conversation that I missed?
> 
> Ralf Habacker wrote:
>     This patch does it the same way as already implemented in kcoreaddons https://github.com/KDE/kcoreaddons/blob/master/KF5CoreAddonsConfig.cmake.in#L11.
> 
> Aleix Pol Gonzalez wrote:
>     The part I was referring to is actually:
>     ```
>     if(CMAKE_CROSSCOMPILING AND KF5_HOST_TOOLING)
>         find_file(TARGETSFILE KF5CoreAddons/KF5CoreAddonsToolingTargets.cmake PATHS ${KF5_HOST_TOOLING} ${CMAKE_CURRENT_LIST_DIR} NO_DEFAULT_PATH)
>         include("${TARGETSFILE}")
>     else()
>     ```
>     
>     I don't think we should take into account CROSSCOMPILING if KF5_HOST_TOOLING isn't specified. Including the target files should define all the needed targets.
> 
> Ralf Habacker wrote:
>     @alex: You remember that I asked about 8 month ago about an example how to implement this way and did not get any answer ? Any now you insist to use a broken way without any help or tutorial ?
> 
> Aleix Pol Gonzalez wrote:
>     My apologies if I haven't been verbose enough. I can try to document `KF5_HOST_TOOLING` later tonight. Would that help?
>     
>     My name is Aleix.

@aleix: From my experience on adding cross compile support at https://build.opensuse.org/project/monitor/home:rhabacker:branches:windows:mingw:win32:KF526, which is complete and works, there are several details to cover and I'm not sure how much work remains to make it complete using the KF5_HOST_TOOLING way after you documentated it.  Because the original KDE cmake guru abandoned his approach to implement cross compile support with KDE 4.5 and never resumes it looks really to have some major issues. 

My suggestion is therefore to complete the recent approach (which can coexist with the incomplete KF5_HOST_TOOLING stuff if wished) to have a stable and working solution and then to see how to improve cross compile support by supporting the KF5_HOST_TOOLING way.

In short my approach compiles required native cross tools at  home:rhabacker:branches:KDE:Frameworks526 (kcoreaddons and sonnet also includes required tools for cross compiling but related kf5 packages version 5.26 already installs them unconditionally in the development package. (With a few pending kf5 build system related patches reviewed this project can be skipped). 

At https://build.opensuse.org/project/monitor/home:rhabacker:branches:windows:mingw:win32:KF526 all required native tools are packaged (and relocated to /usr/bin/<cross-prefix>-<toolname>) by the mingw32-cross-kf5-tools package.

With this and other mingw32-cross... packages provided by the opensuse windows:mingw:win32 project, windows kf5 packages are build. The mingw32-kxx packages fetches kf5 source packages extracted directly from kde git server using tags and uses local patches from for fixing remaining issues (for example https://build.opensuse.org/package/show/home:rhabacker:branches:windows:mingw:win32:KF526/mingw32-kdoctools).

BTW: Sorry for using wrong name.


- Ralf


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On Sept. 26, 2016, 4:23 nachm., Ralf Habacker wrote:
> 
> -----------------------------------------------------------
> This is an automatically generated e-mail. To reply, visit:
> https://git.reviewboard.kde.org/r/129025/
> -----------------------------------------------------------
> 
> (Updated Sept. 26, 2016, 4:23 nachm.)
> 
> 
> Review request for Documentation, KDE Frameworks and Luigi Toscano.
> 
> 
> Repository: kdoctools
> 
> 
> Description
> -------
> 
> Enable cross compilation support for packages depending on normally installed kdoctools tools.
> 
> 
> Diffs
> -----
> 
>   KF5DocToolsConfig.cmake.in 9224fd2788aee5db4340cd0ac8115c1a06ca8ebe 
> 
> Diff: https://git.reviewboard.kde.org/r/129025/diff/
> 
> 
> Testing
> -------
> 
> 
> Thanks,
> 
> Ralf Habacker
> 
>

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