mesa OpenGL header problem with mesa > 17 on SnowLeopard (and older) -- help wanted

[Christopher Chavez]

Sent: Wednesday, February 03, 2021 at 7:02 PM
From: "Ken Cunningham" <ken.cunningham.webuse at gmail.com>
To: "MacPorts Developers" <macports-dev at lists.macports.org>
Subject: mesa OpenGL header problem with mesa > 17 on SnowLeopard (and older) -- help wanted
> I’m stuck, and that doesn’t happen so often to me.
> 
> Something is going on that makes mesa versions > 17 not build on 10.6 (but does on 10.7+) — some kind of redefinition hiccup.
> 
> It is proving quite vexing.
> 
> Almost ready to throw in the towel and peg mesa at 17.x for older systems unless someone has some inspiration on what the heck is going on …

There are some old mesa-on-macOS issues which look related, I've left a comment: https://trac.macports.org/ticket/62203#comment:18