Interesting. OCaml cross compilation scared me the one time I considered it, so it's nice to know this is an option. I will be pedantic and say it isn't a replacement for a custom sysroot/binutils/whatnot, since it really just papers over those user-facing details by shipping a prebuilt collection of sysroots and using LLD. They sorta get this for free since they need it for cross-compiling Zig code anyways.