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5041 :: Nim standard library on embedded platforms

• endes (orginal) [2019-07-23T19:40:00+02:00] view original

  Hi, time ago I made a project for use Nim on arduino for esp8266. Now I'm starting a more ambitious project to use Nim on many different embedded platforms. But I have 2 problems.

  1. In the generated code, Nim includes a call to stderr due to proc raiseOutOfMem in mmdisp.nim. Is there a way to get rid of it without setting the gc to none?
  2. Is there a way of override system io.nim (like a compiler parameter)? Because every embedded platform has a custom library for accessing IO.

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• dom96 (orginal) [2019-07-23T20:09:10+02:00] view original

  You should be able to use this for clues: https://github.com/dom96/nimkernel (it's likely that things have changed since and that it's broken now)

  TL;DR: try --os:standalone.

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• endes (orginal) [2019-07-23T20:25:17+02:00] view original

  I'm using --os:standalone (this is my full parameters list --os:standalone --gc:regions --cpu:mips --define:StandaloneHeapSize=32 --opt:size), but Nim still includes a call to stderr and import io.nim.

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• mratsim (orginal) [2019-07-25T01:14:50+02:00] view original

  I think the team would be happy to discuss a switch to disable io (or add it to os:standalone) so that it's easier to use with embedded. You should probably start with a RFC: https://github.com/nim-lang/RFCs

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• dom96 (orginal) [2019-07-25T21:00:09+02:00] view original

  In this case I think a PR to get this done is fine, it shouldn't require much changes. It'll be easier to discuss in the PR and be more efficient time-wise.

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