compiling for armv7-unknown-linux-musleabihf on MacOS M1 chip.

[madelaney]

All,

I have a project, that requires openssl, that I'm trying to cross compile for armv7-unknown-linux-musleabihf.

When I try to setup cross.toml, to install libssl as part of the pre-build, (see https://gist.github.com/madelaney/579327549f92baa15effa71fe4dfba1d), I cannot compile as I get the following error:

cross build --profile release --target armv7-unknown-linux-musleabihf
[cross] warning: using older rustc `1.74.1 (a28077b28 2023-12-04)` for the target. Current active rustc on the host is `rustc 1.77.0 (aedd173a2 2024-03-17)`.
 > Update with `rustup update --force-non-host stable-x86_64-unknown-linux-gnu`
[+] Building 0.5s (3/3) FINISHED
 => [internal] load build definition from Dockerfile.armv7-unknown-linux-musleabihf-custom                                                                                         0.0s
 => => transferring dockerfile: 263B                                                                                                                                               0.0s
 => [internal] load .dockerignore                                                                                                                                                  0.0s
 => => transferring context: 2B                                                                                                                                                    0.0s
 => ERROR [internal] load metadata for ghcr.io/cross-rs/armv7-unknown-linux-musleabihf:0.2.5                                                                                       0.4s
------
 > [internal] load metadata for ghcr.io/cross-rs/armv7-unknown-linux-musleabihf:0.2.5:
------
failed to solve with frontend dockerfile.v0: failed to create LLB definition: no match for platform in manifest sha256:b4f481f30ceca34730a5723f717396d762d94f6eddd7e1cf7c7862d1377ff98c: not found
Error:
   0: could not run container
   1: when building custom image
   2: when pre-building
   3: `docker build --label 'org.cross-rs.for-cross-target=armv7-unknown-linux-musleabihf' --label 'org.cross-rs.workspace_root=<dir>' --tag cross-custom-adblock-sanitizer:armv7-unknown-linux-musleabihf-4bd5e-pre-build --build-arg 'CROSS_CMD=dpkg --add-architecture $CROSS_DEB_ARCH
      apt-get update && apt-get install --assume-yes libssl-dev:$CROSS_DEB_ARCH
      echo -e '\''#!/bin/bash
      echo test'\'' > /usr/bin/test-echo
      chmod +x /usr/bin/test-echo' --build-arg 'CROSS_DEB_ARCH=musl-linux-armhf' --file .../target/armv7-unknown-linux-musleabihf/Dockerfile.armv7-unknown-linux-musleabihf-custom <dir>` failed with exit status: 1

Note: CROSS_CMD=dpkg --add-architecture $CROSS_DEB_ARCH
apt-get update && apt-get install --assume-yes libssl-dev:$CROSS_DEB_ARCH
echo -e '#!/bin/bash
echo test' > /usr/bin/test-echo
chmod +x /usr/bin/test-echo
Exit 1

I'm using Docker 20.10.21 so I should be good with the verison.

I suspect it's because I'm on a Apple M1 chip not x86_64/amd64 so I tried to set the platform for docker (see below) but with no difference.

export CROSS_CONTAINER_OPTS="--platform linux/amd64"
cross build --profile release --target armv7-unknown-linux-musleabihf

I do have the docker container pulled locally:

docker pull --platform linux/amd64 ghcr.io/cross-rs/armv7-unknown-linux-musleabihf:0.2.5
0.2.5: Pulling from cross-rs/armv7-unknown-linux-musleabihf
Digest: sha256:b4f481f30ceca34730a5723f717396d762d94f6eddd7e1cf7c7862d1377ff98c
Status: Image is up to date for ghcr.io/cross-rs/armv7-unknown-linux-musleabihf:0.2.5
ghcr.io/cross-rs/armv7-unknown-linux-musleabihf:0.2.5

[Emilgardis]

This is solved on the main branch, use that or you can try setting CROSS_CONTAINER_OPTS="--platform linux/amd64", you'll only need to do it once. See #1214

[Emilgardis]

Actually, I see now that you've pulled the image, then it's the same error but a bit different, you need to do CROSS_BUILD_OPTS="--platform linux/amd64"

[madelaney]

Thanks @Emilgardis , using CROSS_BUILD_OPTS seems to have fixed the issue.