[genewitch]

gentoo is aces at crossdev - that's what gentoo calls it. https://wiki.gentoo.org/wiki/Cross_build_environment I believe this is the guide page i use, as it's purple in websearch results.

I've used it a fair amount, to build x86 on x86_64, to build arm 32 on x86_64, etc. It will also let you build x86_64 on x86_64 but for a different CPU type, so i can build packages/binaries for older systems on a newer system (like, a system with no avx-whatever can be build on a current-gen machine where the compilation goes way faster but builds binaries for the older system.)

[rcxdude]

Ah, cool. It's been a long time since I used it in anger, and it was not so hot then (yocto was I think the first system out of 3-4 I tried that actually gave me a functioning cross-toolchain, and gentoo's crossdev was one of those. This is like a decade ago though).

[genewitch]

maybe longer than a decade, i've been cross-compiling on gentoo for at least 13 years without issue (that's 2012, for those playing along at home.) I say "at least" because i can't remember doing it prior to raspberry pi...