Fth is a Forth language interpreter. It includes the interpreter itself, fth,
and the extension library libfth. You can write Forth scripts and interpret them
with the interpreter fth, or you can link libfth into an application to use it
as extension language.
New port: lang/fth: Forth interpreter and extension library
fth will be used as a dependency of audio/snd. audio/snd uses
forth as one of its extension languages, along with ruby and
scheme's S7 implementation.
Approved by: tcberner (mentor)
Differential Revision: D13887