LLVM installation

Installing LLVM on macOS

Installation with macports

• install LLVM first

• Then install llvm-select

• Then sudo port select llvm gives something like:

Available versions for llvm:
 	mp-llvm-10
	mp-llvm-11
 	mp-llvm-12 (active)
 	mp-llvm-devel
 	none

• You can chose the version you want to install: sudo port select llvm mp-llvm-11

• Now llvm-config should now be available

Installation with brew

• do brew install llvm

• on M1 chipset-based systems, homebrew does not automatically link llvm into user space, so an additional brew link --force llvm is needed