Environment variable used by CMake to detect Visual C++ compiler tools for Ninja

Question

I have Mingw64 GCC 6.3.0 (always in PATH) and Visual C++ compiler tools from Visual Studio 2017 RTM (not in PATH).

If I run cmake . -

Answer 1

use a toolchain file

set(CMAKE_C_COMPILER cl.exe)
set(CMAKE_CXX_COMPILER cl.exe)

then build your cmake project with with -DCMAKE_TOOLCHAIN_FILE=toolchainfile