oracle db reads from postgresql

I've dreaded this task coming my way for years.  An Oracle developer
wants to read postgresql data from his Oracle db.  Is there a current,
successful path to making this work or is it fools errand? I find this
description:
https://dbaspot.wordpress.com/2013/05/29/how-to-access-postgresql-from-oracle-database/
which is 3 yrs old.  I see they want me to load an v8 rpm for the odbc
driver so I tried to compile the latest and failed out of the gate.
Just wondering if anyone has it working or not?   Is there a more
current howto?