`EnvDeploy` fails on DSM 7.2.2 platform rtd1619b `(chroot: failed to run command ‘ln’: Exec format error)`

[heidrun00]

I am attempting to compile Bluetooth modules for my Synology DS223j running DSM 7.2.2 with the rtd1619b architecture.
So i have to set up the toolkit environment within a Docker container which i used this command for:

docker create -it --name ubuntu --privileged --security-opt systempaths=unconfined ubuntu:latest

Followed this guide from Synology to set up the toolkit.
git, cifs-utils, python3, python3-pip, are installed.

After ./EnvDeploy -v 7.2 -p rtd1619b I get this Error:

[2025-01-09 20:45:50,940] INFO: tar -xhf /toolkit/toolkit_tarballs/ds.rtd1619b-7.2.dev.txz -C /toolkit/build_env/ds.rtd1619b-7.2
chroot: failed to run command ‘ln’: Exec format error 
Traceback (most recent call last):
    File "/toolkit/pkgscripts-ng/include/python/exec_env.py", line 76, in execute
       output = commandrunner.run(cmd, display=display, **kwargs)
                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    File "/toolkit/pkgscripts-ng/include/python/commandrunner.py", line 39, in run
       raise RunShellFailed(p.returncode, cmd, output) 
commandrunner.RunShellFailed
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
    File "/toolkit/pkgscripts-ng/./EnvDeploy", line 77, in <module>
       main(sys.argv[1:])
    File "/toolkit/pkgscripts-ng/./EnvDeploy", line 71, in main
       toolkit.deploy()
    File "/toolkit/pkgscripts-ng/include/python/pkgdeploy.py", line 207, in deploy
       self.link_pkgscripts(envs[platform])
    File "/toolkit/pkgscripts-ng/include/python/pkgdeploy.py", line 166, in link_pkgscripts
       env.link('pkgscripts-ng', 'pkgscripts')
    File "/toolkit/pkgscripts-ng/include/python/exec_env.py", line 61, in link 
       self.execute(['ln', '-sf', src, dest])
    File "/toolkit/pkgscripts-ng/include/python/exec_env.py", line 79, in execute
       raise EnvError(
exec_env.EnvError: ('Execute chroot /toolkit/build_env/ds.rtd1619b-7.2 ln -sf pkgscripts-ng pkgscripts failed',
'chroot: failed to run command ‘ln’: Exec format error')

Any suggestions?

[fabiov64]

You need a x64 environment to compile the packages. The binaries provided (such as ln) can run only on a Linux x64. I'm experiencing the same issue when trying to compile packages using docker on my DS223.
You should be successful running docker on a native Linux x64 environment or on a QEMU emulated environment.
I'm able to compile the Synology packages on a Apple Silicon Mac using Docker Desktop, just because it is able to natively emulate a x64 architecture.