I installed the LLVM built from GitHub, because I have got an old OS (macOS Catalina 10.5.7) and I'm learning C++ so I needed some compilers that would be compatible with C++20 standards. I looked for resources and saw that people recommended homebrew. I tried installing through Homebrew however it wouldn't build for hours. On top of that my MacBook Pro fan started screaming. So I installed the compiler through LLVM releases. My question is: If I add this to my PATH would that have any effect on the system's default compilers?