Where is $ERL_TOP on a macports installation of Erlang

Question

I've installed Erlang through macports on my macbook and I'm trying to use the Erlang Eclipse plugin, but it needs me to point it to the $ERL_TOP directory.

Where does that exist? I know my erl binary shell is located at:

which erl
/opt/local/bin/erl

Answer 1

Found a symbolic link in /opt/local/bin/to_erl that brought me to: /opt/lib/erlang

This appears to be my $ERL_TOP