Thank you for the response. I purchased a dev board from Ali Express and cannot figure out which config file to use with the OpenOCD. Again using Ubuntu 18.0.4; and VSCode. I am trying to figure out the parameters for the JTAG (FT2232H) device so I can choose a config file. JTAG description from Ali...

Can the J-Link EDU Mini be used as a debug tool for the ESP32?

Cannot find a file included in the freertos library - reent.h.
I get a compiler warning and sometimes cannot build/flash the ESP32 part.
Using VSCode to build a project on Ubuntu 18.0.4.
Very annoying - could anyone help out.