Correct way to setup 'armhf' cross stage/compile?

5

Hi,

Not sure if this is still a problem for you, but see my answer to a similar problem: Stage-Packages with --target-arch

Not sure if you ran into this problem, but you may need to use quotes around the package name, i.e. instead of stage-packages: [iperf3:armhf], you need to do stage-packages: ["iperf3:armhf"].

For reference, this is my (minimal) /etc/apt/sources.list that works for my cross-compiled stage-packages (and also for your iperf3 package):

deb [arch=amd64] http://archive.ubuntu.com/ubuntu/ xenial main restricted
deb [arch=amd64] http://archive.ubuntu.com/ubuntu/ xenial-updates main restricted
deb [arch=amd64] http://archive.ubuntu.com/ubuntu/ xenial universe
deb [arch=amd64] http://archive.ubuntu.com/ubuntu/ xenial-updates universe
deb [arch=amd64] http://archive.ubuntu.com/ubuntu/ xenial multiverse
deb [arch=amd64] http://archive.ubuntu.com/ubuntu/ xenial-updates multiverse
deb [arch=amd64] http://archive.ubuntu.com/ubuntu/ xenial-backports main restricted universe multiverse
deb [arch=amd64] http://security.ubuntu.com/ubuntu/ xenial-security main restricted
deb [arch=amd64] http://security.ubuntu.com/ubuntu/ xenial-security universe
deb [arch=amd64] http://security.ubuntu.com/ubuntu/ xenial-security multiverse

deb [arch=armhf,arm64] http://ports.ubuntu.com/ubuntu-ports xenial main universe
deb [arch=armhf,arm64] http://ports.ubuntu.com/ubuntu-ports xenial-security main universe
deb [arch=armhf,arm64] http://ports.ubuntu.com/ubuntu-ports xenial-updates main universe
deb [arch=armhf,arm64] http://ports.ubuntu.com/ubuntu-ports xenial-backports main universe

Note that I also specify ports.ubuntu.com for arm64 so I can also cross compile for arm64, this isn’t necessary if you’re just building for armhf. Also note that you don’t need the deb-src lines if you’re just installing the package.

I was able to build a snap with the following minimal part definition (the rest of the snapcraft.yaml removed for clarity):

parts:
  my-part:
    plugin: nil
    stage-packages:
      - on amd64 to armhf:
          - "iperf3:armhf"
      - else:
        - "iperf3"

Also note that I invoked snapcraft as snapcraft --target-arch=armhf on an Ubuntu 16.04 classic VM and it downloaded the correct package and installed it in the snap.

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