CMake does not find Visual C++ compiler

Question

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         


        

Answer 1

Look in the Cmakelists.txt if you find ARM you need to install C++ for ARM and as well vcvarsall.bat use for ARM bin folder.

It's these packages:

C++ Universal Windows Platform for ARM64 "Not Required"

Visual C++ Compilers and libraries for ARM "Not Required"

Visual C++ Compilers and libraries for ARM64 "Very Likely Required"

Required for finding Threads on ARM 
enable_language(C) 
enable_language(CXX)

Then the problems might disappear:

No CMAKE_C_COMPILER could be found.

No CMAKE_CXX_COMPILER could be found.

If above does not resolve your problem?

Optionally you can remove the options C and CXX in cmakelists.txt by setting # infront of where the enable_language(C) is. And avoid Android ARM processor compilation.

Answer 2

In my case there was an environment variable set which was the reason for this error. The problem was solved after deleting cxx_flags from the environment variables.

Answer 3

I got this problem with CMake 3.12.1, after an update of Visual Studio 2017. I simply re-ran CMake and it worked.