After installing the command line tools for XCODE I was able to compile/link/run successfully from the command line: gcc-12  -lstdc++  -std=c++20 main.cpp -o main This is using the GNU c++ compiler. Now the question is: Is it possible to do the same from within XCODE: I.E. Use the GNU c++ compiler to compile code using C++20 dialect? Please explain in detail how. (More than just select the C++ dialect: GNU++20 in the build settings, because that does NOT work!) I get error: No member named 'views' in the namespace 'std::ranges' Thank you.