CMAKE_COMPILER_IS_GNUCXX and CMAKE_CXX_COMPILER_ID are empty

Question

I am currently playing around with CMake and want to detect the compiler and the compiler version. My current CMakeLists.txt looks as follows:

cmake         


        

Answer 1

It might help you tell CMake that this is a C++ project. To do it you say it in the project command:

project ($(PROJECT) CXX)
#                   ^^^
# Note project type

You might also want to do it before checking the variable.