After installing Visual Studio 2015 and running CMake on a previous project, CMake errors stating that it could not find the C compiler.
The C compiler ident
I ran into the same issue and fixed it by relaunching the Visual Studio Install and checking the following option:
Windows and Web Development
/ Universal Windows App Development Tools
/ Windows 10 SDK
It contains the standard C++ headers used in most applications and therefore it is often necessary to install it as well.