[CMake] Support for multiple components in cpack (reloaded)

[Alexander Neundorf]

On Sunday 22 August 2010, Eric Noulard wrote:
...
> CPack is not aware **AT ALL** of subprojects :-(
>
> It's even worse, since CPack is not meant to be included more than once
> in the same tree.
> In fact you already know that because you are the reporter of this:
> http://public.kitware.com/Bug/view.php?id=10751
>
> A related discussion on the ML:
> http://www.cmake.org/pipermail/cmake/2010-August/038648.html
>
> So I would say, unless I misunderstood something,
> that **currently** you CAN NOT use "subproject" to do any grouping with
> CPack. If any subproject do include(CPack) while your toplevel project does
> it as well, you'll get unexpected behavior.
> The most probable consequence is that is you call "make package" in the
> toplevel project you'll get a source package instead of a binary package
> :-)
>
> What you CAN ALREADY do is to use your toplevel project to build a package
> which contains all subprojects. You can even use component in the
> subproject(s) it will
> work as expected.
>
> If we want to be able to include(CPack) several times, many thing
> should be changed

This would probably make cpack usable for KDE, where we have a lot of apps 
(subprojects) inside one svn tree :-)

> and we should specify the expected behavior very precisely, I do not
> think it's as easy
> as it may seems. Definitely on my workplan now :-(

Cool, thanks for your efforts :-) 

Alex