Hey! I was looking for an option to cross-compile some program, long story short: cross compilation is not supported.

And I've discovered that docker support --platform switch.

Setup required:

• # apt install -y qemu binfmt-support qemu-user-static
• # docker run --rm --privileged multiarch/qemu-user-static:register

And while this solution is nowhere close to being fast, it works, it runs arm images on amd64 host.

root@oldpc ~# docker run --rm -ti --platform linux/arm/v7 debian:latest uname -m
armv7l

Which mean that you could do a native build of arm64 binaries on amd64 host, in case when cross compilation is not an option. Or you could test if some edge-case happen on arm hosts.

What do you think about bringing support of --platform switch to the Abstruse CI? In my opinion it should be configurable in the matrix in .abstruse.yml, like this:

platform: host // Special platform that just take `uname -m` as platform
matrix:
  - platform: arm64
  - platform: arm/v7