Setting up the environment for the invocation commands
If you used the xlc_install utility
to install the compiler and you elected to create the symbolic links at that
time, you have already set up the environment for the invocation commands.
Do not perform the procedures in this section.
If you did not elect to create the symbolic links when you installed the
compiler and want to invoke the compiler without having to specify the full
path, you must perform one of the following tasks: