Luckily Zig makes this quite easy to do. In Mach[0] we are able to just `zig build -Dtarget=x86_64-linux-gnu.2.28` to build GUI apps against an ~8 year old glibc version for maximum compatibility.

This is possible because Zig allows for targeting most glibc versions out of the box with its cross-compilation support.

[0] https://machengine.org