CMake always requires C++ compiler

[caspermeijn]

I found a minor bug in the CMake generation. When configuring the CMake project, it requires a C++ compiler to be present even if the project doesn't use it. I solved is by doing sudo dnf install arm-none-eabi-gcc-cs-c++.

I got the following error message:

CMake Error at CMakeLists.txt:9 (project):
  The CMAKE_CXX_COMPILER:

    arm-none-eabi-g++

  is not a full path and was not found in the PATH.