Alexander Neundorf wrote:
I'm not sure how to handle the following:
in kdelibs/ I have a bunch of custom cmake modules, located in
kdelibs/cmake/modules/. When compiling kdelibs/ I just set
CMAKE_MODULE_PATH to ${CMAKE_SOURCE_DIR}/cmake/modules/ and it works.
Then kdelibs/ has to be installed.
After that, when compiling something which depends on kdelibs/, e.g.
kdebase/, I'd like to reuse the cmake modules from kdelibs/.
[snip]
What do you suggest ?
Make kdelibs a CMake Package for use with FIND_PACKAGE. Section 6.7 of
Mastering CMake describes this approach. See here for some examples:
http://www.vtk.org/cgi-bin/viewcvs.cgi/Utilities/LastConfigureStep/CMakeLists.txt?view=markup
http://www.vtk.org/cgi-bin/viewcvs.cgi/vtkGenerateVTKConfig.cmake?view=markup
http://www.vtk.org/cgi-bin/viewcvs.cgi/VTKConfig.cmake.in?view=markup
http://cvs.sourceforge.net/viewcvs.py/vxl/vxl/config/cmake/export/CMakeLists.txt?view=markup
http://cvs.sourceforge.net/viewcvs.py/vxl/vxl/config/cmake/Modules/VXLConfig.cmake.in?view=markup
Basically there would be a KDELibsConfig.cmake file installed somewhere
in the KDE install tree (and another in the build tree). This file
would contain a bunch of variable settings that tell projects where to
find everything else such as your custom modules, the include path, and
the library path. Then calling FIND_PACKAGE(KDELibs) would NOT find a
FindKDELibs.cmake and instead create a KDELibs_DIR cache entry that
points at a directory containing KDELibsConfig.cmake. This would be the
only cache entry in the user project that is related to finding KDELibs,
which makes it easy for users to switch which version of KDELibs to use
if multiple are available.
The advantage of this approach is that all the find logic is built into
CMake so no special search logic needs to be copied into every project
that wants to find KDELibs. Also if it is not found automatically the
user need set at most one cache entry.
-Brad
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