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Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
@Gordon
The emulator for the IDE is build with this script: https://github.com/espruino/EspruinoWebIDE/blob/master/extras/create_emulator.sh
So the actual board targets are (confusingly) just EMSCRIPTEN.py and EMSCRIPTEN2.py
The Linux build was an unused attempt at making a linux executable for testing Bangle.js apps, but in the end I figured it was safer just to use the JS Emscripten app for that