Review Request 116025: Add documentation about writing find modules

[Alex Merry]

> On Feb. 25, 2014, 3:56 p.m., Stephen Kelly wrote:
> > docs/writing-find-modules.md, line 9
> > <https://git.reviewboard.kde.org/r/116025/diff/2/?file=246011#file246011line9>
> >
> >     You can link to
> >     
> >      http://www.cmake.org/cmake/help/git-master/manual/cmake-packages.7.html
> >     
> >     for upstream info on this.

I guess http://www.cmake.org/cmake/help/git-master/manual/cmake-developer.7.html#find-modules is the one to extend?


> On Feb. 25, 2014, 3:56 p.m., Stephen Kelly wrote:
> > docs/writing-find-modules.md, line 50
> > <https://git.reviewboard.kde.org/r/116025/diff/2/?file=246011#file246011line50>
> >
> >     The imported targets should be the primary way of using the module. I don't think the _INCLUDES and _LIBRARIES etc variables should even be set if imported targets are provided.

Fair point, although for modules we've previously provided, I'm inclined to set them for ease of porting.


> On Feb. 25, 2014, 3:56 p.m., Stephen Kelly wrote:
> > docs/writing-find-modules.md, line 98
> > <https://git.reviewboard.kde.org/r/116025/diff/2/?file=246011#file246011line98>
> >
> >     I don't think AUTHOR_WARNING is appropriate here. Why not WARNING?

Because it's a warning for authors (of project build scripts) rather than users (ie: those building the package).  I thought that was exactly what AUTHOR_WARNING was for...


> On Feb. 25, 2014, 3:56 p.m., Stephen Kelly wrote:
> > docs/writing-find-modules.md, line 153
> > <https://git.reviewboard.kde.org/r/116025/diff/2/?file=246011#file246011line153>
> >
> >     Don't set Foo_VERSION_STRING, set Foo_VERSION. That is canonical because of config-file packages.

OK; I was following a pattern from other CMake scripts.  Also, it is what http://www.cmake.org/cmake/help/git-master/manual/cmake-developer.7.html#find-modules suggests.


> On Feb. 25, 2014, 3:56 p.m., Stephen Kelly wrote:
> > docs/writing-find-modules.md, line 325
> > <https://git.reviewboard.kde.org/r/116025/diff/2/?file=246011#file246011line325>
> >
> >     Note that only build-properties of the target itself should be here. Not those of dependencies (if the dependency provides imported targets, which it should/must for this stuff to work). CMake will resolve that itself.

Are you saying that INTERFACE_INCLUDE_DIRECTORIES line is wrong?  Or that I should add a comment?


> On Feb. 25, 2014, 3:56 p.m., Stephen Kelly wrote:
> > docs/writing-find-modules.md, line 145
> > <https://git.reviewboard.kde.org/r/116025/diff/2/?file=246011#file246011line145>
> >
> >     Actually it's mostly important so that users can set it in the cache if they have the library in a non-predicted location.

Well, I meant the reason we set Foo_LIBRARY and then just set Foo_LIBRARIES to that same value, rather than using Foo_LIBRARIES directly.  But I guess I should talk about making the cache entries the user has to set consistent.


- Alex


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On Feb. 25, 2014, 10:59 a.m., Alex Merry wrote:
> 
> -----------------------------------------------------------
> This is an automatically generated e-mail. To reply, visit:
> https://git.reviewboard.kde.org/r/116025/
> -----------------------------------------------------------
> 
> (Updated Feb. 25, 2014, 10:59 a.m.)
> 
> 
> Review request for Build System, Extra Cmake Modules and KDE Frameworks.
> 
> 
> Repository: extra-cmake-modules
> 
> 
> Description
> -------
> 
> Add documentation about writing find modules
> 
> 
> Diffs
> -----
> 
>   README.md 85b97b7fa003282e1eeb1113c4668a9b73e3f731 
>   docs/writing-find-modules.md PRE-CREATION 
> 
> Diff: https://git.reviewboard.kde.org/r/116025/diff/
> 
> 
> Testing
> -------
> 
> 
> Thanks,
> 
> Alex Merry
> 
>

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