Szathmáry László honlapja @ DEIK

On Linux

echo system.hostOS # "linux"

echo hostOS # "linux"

echo system.hostCPU # "amd64"

The system module is implicitly imported. You can simply write hostOS, or, if you want, you can qualify it with the module's name too: system.hostOS

On Windows

echo hostOS # "windows"

On Mac

echo hostOS # "macosx"

Probably, I couldn't try it.

In the source code we can find this (system.nim):

hostOS* {.magic: "HostOS".}: string = ""
## A string that describes the host operating system.
##
## Possible values:
## `"windows"`, `"macosx"`, `"linux"`, `"netbsd"`, `"freebsd"`,
## `"openbsd"`, `"solaris"`, `"aix"`, `"haiku"`, `"standalone"`.

platform info

On Linux

On Windows

On Mac