Thanks for the quick response!
glxgears works, this is the output you requested:
GL_RENDERER = Radeon RX 580 Series (POLARIS10, DRM 3.37.0, 5.7.2-zen1-1-zen, LLVM 10.0.0)
GL_VERSION = 4.6 (Compatibility Profile) Mesa 20.1.1
GL_VENDOR = X.Org
Yes, my computer is 64-bit :) For completeness, the output of `uname -a`
Linux arch-desktop 5.7.2-zen1-1-zen #1 ZEN SMP PREEMPT Wed, 10 Jun 2020 20:36:27 +0000 x86_64 GNU/Linux
I also tried the suggestion from espr, `LD_PRELOAD=/usr/lib/libstdc++.so ./Skeletris` and that works.
Again for completeness, the output of `ls -l /usr/lib/libstdc++.so`
lrwxrwxrwx 1 root root 19 21 mei 19:20 /usr/lib/libstdc++.so -> libstdc++.so.6.0.28*
I hope this helps track down and solve the underlying issue. If you need any more info or any more tests, please let me know.