CMake 3.0.0 warnings

[mantid-builder]

Original Reporter: Samuel Jackson

I tried building Mantid with CMake 3.0.0. It worked great, but I get a bunch of warnings that look something like the following:

CMake Warning (dev) in MantidQt/Python/CMakeLists.txt:
  Policy CMP0043 is not set: Ignore COMPILE_DEFINITIONS_`<Config>` properties.
  Run "cmake --help-policy CMP0043" for policy details.  Use the cmake_policy
  command to set the policy and suppress this warning.
This warning is for project developers.  Use -Wno-dev to suppress it.

Here's what the CMake docs say about CMP0043:
http://www.cmake.org/cmake/help/v3.0/policy/CMP0043.html

Probably not the most high priority ticket, but we will most likely have to deal with it sooner or later.

[mantid-builder]

This issue was originally trac ticket 9833