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  • Hash : ebabb88f
    Author : Patrick Steinhardt
    Date : 2019-10-10T09:25:32

    cmake: update minimum CMake version to v3.5.1
    
    Back in commit cf9f34521 (cmake: bump minimum version to 2.8.11,
    2017-09-06), we have bumped the minimum CMake version to require at
    least v2.8.11. The main hold-backs back then were distributions like
    RHEL/CentOS as well as Ubuntu Trusty, which caused us to not target a
    more modern version. Nowadays, Ubuntu Trusty has been EOL'd and CentOS 6
    has CMake v3.6.1 available via the EPEL6 repository, and thus it seems
    fair to upgrade to a more recent version.
    
    Going through repology [1], one can see that all supported mainstream
    distributions do in fact have CMake 3 available. Going through the list,
    the minimum version that is supported by all mainstream distros is in
    fact v3.5.1:
    
    	- CentOS 6 via EPEL6: 3.6.1
    	- Debian Oldstable: 3.7.2
    	- Fedora 26: 3.8.2
    	- OpenMandriva 3.x: 3.5.1
    	- Slackware 14.2: 3.5.2
    	- Ubuntu 16.04: 3.5.1
    
    Consequentally, let's upgrade CMake to the minimum version of 3.5.1 and
    remove all the version CMake checks that aren't required anymore.
    
    [1]: https://repology.org/project/cmake/versions