New comment by Duncaen on void-packages repository

https://github.com/void-linux/void-packages/issues/25604#issuecomment-778327962

Comment:
Yes `-a` instructs xbps to do cross compilation, without it its quite surprising that this does not fail earlier, but that is the issue.

Using `./xbps-src bootstrap cross-arch` is like creating a masterdir with `./xbps-src binary-bootstrap cross-arch` which is useless,
you want  a build chroot that works on your host architecture and then cross compile from there with a cross toolchain.