installing and finding cmake-built projects

[Alexander Neundorf]

Hi,

we have a bunch of cmake-built projects in kdesupport/. We have FindFoo.cmake 
modules for them in kdelibs/.
These FindFoo.cmake modules don't take advantage of the fact that these 
packages have also been built with cmake, they just search for them as for 
any other package.

I changed this now for Strigi (and Automoc already did it already). So how are 
Strigi and Automoc found now ?
Inside FindStrigi.cmake there is now a call

find_package(Strigi NO_MODULE)

This tells cmake to search for a file named StrigiConfig.cmake in a bunch of 
default locations, e.g. CMAKE_INSTALL_PREFIX/lib/Strigi/. 
If it find StrigiConfig.cmake there, it loads and executes this file. This way 
it is possible to get basically any information from a cmake-built project 
into a cmake-using project.
StrigiConfig.cmake (generated using configure_file() from 
StrigiConfig.cmake.in to set the version number variables correctly) contains 
the version number information, the include directory, the library directory 
and search calls for the libraries and also the API type (strigi specific).
In case the file is not found it still falls back to the old search logic.

I think we should do it this way for all projects in kdesupport/.

Comments ?

Alex