overriding CMAKE_MODULE_PATH

[Yury G. Kudryashov]

Andreas Pakulat wrote:

> On 16.08.10 14:52:58, Yury G. Kudryashov wrote:
>> Andreas Pakulat wrote:
>> 
>> > On 16.08.10 12:16:41, Yury G. Kudryashov wrote:
>> >> Why you don't like the current situation? libktorrent installs
>> >> FindKTorrent into <prefix>/share/apps/cmake/modules. If it is
>> >> installed, kdenetwork should find it (if we add CMAKE_PREFIX_PATH ->
>> >> CMAKE_MODULE_PATH map), else it doesn't find. What's wrong?
>> > 
>> > Whats wrong is that if ktorrent is not installed there's no way to give
>> > the user a useful error message. All you get is a 'no xxxConfig.cmake
>> > found' error from cmake, becuase no FindKTorrent.cmake is found (and no
>> > KTorrentConfig.cmake either). The point of doing a
>> > find_package(KTorrent) is to find out wether its installed or not, if
>> > its not installed you're supposed to give your users a useful message,
>> > preferably telling them where to get it. When the FindKTorrent.cmake is
>> > only installed if ktorrent is installed you're making that impossible.
>> macro_display_feature_log() displays all this information.
> 
> But only if someone calls it. But that doesn't happen if no FindXXX.cmake
> is found by cmake. Because doing a find_package(XXX) and having no
> FindXXX.cmake anywhere is an error for cmake and it stops processing of
> the cmake-files at that point.

kdenetwork calls macro_optionally_find_package(KTorrent), and it doesn't 
stop processing if it fails to find FindKTorrent.cmake.

> 
> Andreas
>