I have a variety of installs of the very latest Ubuntu. I shall make some attempt to compile both Xfractint and the SDL port on that platform, though if I run into any problems (which from your report I likely will), not sure I have the skills to correct them. I have never tried Gentoo Linux, but I can probably find an unneeded hard drive to install it on. Will try Ubuntu first. No one should hold their breath waiting for me. I have been doing all kinds of crazy things in my socially distanced retirement, amazing how the time fills up!