Minimum required cmake version

[Sven Brauch]

Hey,

On 03/01/17 14:13, David Faure wrote:
> Sven, your commits broke knewstuff and some other modules.
> 
> CMake Error at /d/kde/inst/kde_frameworks/share/ECM/modules/
> ECMGeneratePriFile.cmake:137 (message):
>   Required variable PROJECT_VERSION_STRING not set before
>   ECM_GENERATE_PRI_FILE() call.  Did you call ecm_setup_version?
> Call Stack (most recent call first):
>   src/core/CMakeLists.txt:94 (ecm_generate_pri_file)
> 
> Changing the min required cmake version also changes the default values for a 
> number of cmake policies, so you need to adjust the cmakelists.txt 
> accordingly.
I ported everything to the new default policy settings and also fixed
several cmake warnings the switch to 3.0 introduced. The only thing I
don't know how to port is one place in sonnet, there I just set the old
policy for now.

Apologies once more for the noise and breakage!

Best,
Sven


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