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11180 :: Calling compiler flags in file

• Cnerd (orginal) [2024-03-09T07:05:08+01:00] view original

  I am trying to call the compiler flags --threads:off and --mm:arc from the nim file I am working on. Is there a nim way to do this.

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• dwhall256 (orginal) [2024-03-09T12:08:51+01:00] view original

  Using info from here: https://nim-lang.org/docs/compilesettings.html

  I made this program:

  import std/compilesettings
  
  echo querySetting(commandLine)
  Run

  compiled with "--threads:off" and got this output:

  
  c --colors:on --noNimblePath --threads:off -d:NimblePkgVersion=0.1.0 --hints:off -o:/<path removed>/timmy /<path removed>/timmy.nim
  Run

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• janAkali (orginal) [2024-03-09T13:25:45+01:00] view original

  Use the nimscript config: just create a file <name of source file>.nims or config.nims in your project directory and put flags inside:

  switch("threads", "off")
  switch("mm", "arc")
  Run

  this also works:

  --threads:off
  --mm:arc
  Run

  Nim should pick up all adjacent configs automatically when you compile your program.

  Nimscript docs:

  • https://nim-lang.github.io/Nim/nims.html
  • https://nim-lang.github.io/Nim/nimscript.html

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• Cnerd (orginal) [2024-03-10T16:57:10+01:00] view original

  Thanks 👍🏽

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• janAkali (orginal) [2024-03-10T18:08:30+01:00] view original

  Compiler flags only work per project. If you have more than one project in one directory - use name of file as a name of config to set different flags for each of them.

  Here first.nim and second.nim - are two separate projects:

  
  first.nim
  first.nims   # config for `first`
  second.nim
  second.nims  # config for `second`
  config.nims  # config for both `first` and `second`
  Run

  If you try to compile second.nim, you should see hints telling you which config files are active:

  
  $ nim c second.nim
  
  Hint: used config file '/.../config.nims' [Conf]
  Hint: used config file '/.../second.nims' [Conf]
  ...
  Run

  Or, maybe, you're trying to set different compiler flags for two files that will compile to a single executable? As far as I know - it's not possible.

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• hugosenario (orginal) [2024-03-10T19:56:14+01:00] view original

  There are also push/pop but almost I sure won't work with those flags

  https://nim-lang.org/docs/manual.html#pragmas-push-and-pop-pragmas

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