Policy old or new

[timothy]

Debian Mint LMDE-2 Betsy
KMyMoney 4.8.0-9c360433f5
Using KDE Development Platform 4.14.2
cmake version 3.6.2

Hi

I have compiled the above current kmm version successfully, but with a
myriad of policy warnings.

After running 'cmake --help-policy CMP0064' as suggested. I get the
following:

CMake version 3.6.2 warns when the policy is not set and uses
``OLD`` behavior.  Use the ``cmake_policy()`` command to set
it to ``OLD`` or ``NEW`` explicitly.

Could someone kindly explain how to set the policy and whether it should
be set to OLD or NEW?

Many thanks
Regards
Timothy