On Sat, Dec 12, 2020 at 02:27:08PM +0100, Harry Thijssen wrote: Hi It is on a from scratch fresh installed virtual machine. So nothing available from earlier compilations. And no traces of earlier installations. In fact it is an upgrade from my procedures, not from an environment. I have no clue where it comes from. You need to investiage this "-o0" is surely the culprit. As a first line of investigation try grepping gl/Makefile for this string.
J'