[cmake-developers] Add command line options for deprecation message control

[Brad King]

On 07/29/2015 09:26 AM, Brad King wrote:
>  cmake: Add -W options to control deprecation warnings and errors
>  http://cmake.org/gitweb?p=cmake.git;a=commitdiff;h=c96fe0b4

This caused a regression:

 -Wno-dev doesn't work any more in CMake 3.4
 http://www.cmake.org/Bug/view.php?id=15747

Please take a look to fix it and extend the test suite accordingly.

Thanks,
-Brad