Cross-compiling for x86 Synology from Apple Silicon Mac

[rgov]

Docker Desktop for Apple Silicon supports running x86 containers under emulation. This requires building the container with docker buildx build and then specifying the --platform option to docker run. It will of course take longer than on the native architecture.

$ docker buildx build --platform linux/amd64 --output type=image,push=false --tag runfalk/synobuild .

$ docker run --rm --platform linux/amd64 --entrypoint /bin/uname runfalk/synobuild -a
Linux 01a5fb73630e 5.10.76-linuxkit #1 SMP PREEMPT Mon Nov 8 11:22:26 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux

$ docker run --rm -it --platform linux/amd64 --privileged \
    --env PACKAGE_ARCH=geminilake \
    --env DSM_VER=7.0 \
    -v $(pwd)/toolkit_tarballs:/toolkit_tarballs \
    -v $(pwd)/artifacts:/result_spk \
    runfalk/synobuild

[fabiov64]

On Silicon Mac it's possible to cross compile for all the platforms, just following the standard approach. As reported in my post: #138 I successfully compiled for armada38x. I assume it's possible to compile for all the other platforms. The important thing is to pull all the required patches for a given platform, that are not yet included in the master.