Comment 12 for bug 1853168

I guess "unsupported" in the sense of "never worked", and no effort being made to change this situation.

The specific clock_gettime() issue you report was probably fixed with 78b6312f493bbe02a37cc6f5fdcff38683d51236 (on 3.16 and 7.0), though I don't believe this was the only change needed.