The ads for Manx Aztec C for the Apple II described providing a UNIX-like programming
environment. You might find that useful.
There’s a bunch of detail online here:
http://www.aztecmuseum.ca/intro.htm
<http://www.aztecmuseum.ca/intro.htm>
I think it may have even provided pipelines and such (albeit with sequential rather than
simultaneous execution).
-- Chris