I am not sure why, but been having tons of problems getting the docker cross compile environment setup, so I am adding this topic for anyone else that hits the same problem.
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The latest version of docker from the website hangs when I run it. No suggestions I have found have helped to get past that (I tried everything). I tried version 2.5 and that didn’t work either. Version 4.5 seems to get past the problem of starting up and NOT crashing during the docker build.
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The default settings of docker at 2GB size. You need to up that, especially if you set JOBS to a higher value. It was killing the Mac toolchain build because of this. I upped to 10GB and ran with just default jobs (removed JOBS from my command line) and it has made it past that point finally.
I will update this post as I continue, but wanted to get this started in case anyone else hits this and is searching for help.