[libcxx-dev] Problem installing libcxx and libcxxabi using Bootstrapping on Amazon Linux 2

[Raul Tambre via libcxx-dev]

 > but still when I type clang and/or opt in terminal I get "-bash: opt: command 
not found"

Make sure where they're located or installed to is on your PATH.

 > Is "opt" a dir or library?

A tool, i.e. an executable.