[FR] Support for vendor-neutral MESA OpenGL

FrodeSolheim / fs-uae

Cross-platform Amiga emulator with a slight focus on gaming, but also with solid support for productivity apps including just-in-time (JIT) compilation.

https://fs-uae.net/

GNU General Public License v2.0

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[FR] Support for vendor-neutral MESA OpenGL #271

Open vanfanel opened 3 years ago

vanfanel commented 3 years ago

Hi there,

Currently, the configure script fails to detect modern OpenGL implementation using GLVND. It's as simple as using -lOpenGL instead of -lGL.

GLVND is the modern OpenGL implementation, which is vendor-gnostic unlike GLX which is X11-only.

FrodeSolheim commented 3 years ago

Things to figure out:

Is this safe to do when building generic Linux version for many distros? How widespread is the support for -lOpenGL and when was it well supported? Will it raise the minimum required OS version?
If not universally "safe", maybe implement as a fallback with -lGL is not found, or with an --enable option.
Does it work with the OpenGL extension loader?

vanfanel commented 3 years ago

I would go for an --enable option or a fallback. It's pretty standard nowadays, and the way to go WRT OpenGL after the X11 times, but -lGL should still be the default.

FrodeSolheim commented 2 years ago

Implemented as a fallback in https://github.com/FrodeSolheim/fs-uae/commit/b0bd935caffa1bba9bf5df77633698dd6bf4ba15. Will investigate some more about libOpenGL later.