As a target platform or as a development platform?
We don't support targeting Linux out of the box today, but we support Linux as a first-class development platform (it's what I use). That said, we do work on Linux, and if you're willing to do a bit of work, you can use it to write Linux apps. If you want to target X11, you'll need something like https://github.com/google/flutter-desktop-embedding whereas if you want to target the hardware directly, you can do something like https://medium.com/flutter-io/flutter-on-raspberry-pi-mostly... .
Neither. More like "figuring out your build system and how to integrate with the Flutter embedder API and how to hook all that up to the Dart compiler" and that kind of thing.
