Treat them as errors globally. Most of the time a warning is a bug, or problem in code that could be solved in a different (better) manner. Thirdparty code have this disabled. The warnings as errors option can be globally disabled through the CMake GUI, but this is not recommended.
Enable Link Time Code Generation as some libraries are compiled using /GL (Whole Program Optimization) which requires the code generation to be delayed to link time. Not doing this will result in longer build times, as the linker has to terminate its progress if it links a library compiled with /GL, and restart this operation using /LTCG.
Use the 'add_module' macro to add modules without creating duplicate code. This macro also takes a reuse PCH as parameter, so modules that need a precompiled header, could reuse those from different targets that compile them. This commit also restructures the group order of the generated solution files for easier code navigation.
