config.js

//@ts-check
var os = require("os");
var os_type = os.type();

var is_windows = !(os_type.indexOf("Windows") < 0);
var is_bsd = !(os_type.indexOf("BSD") < 0);

exports.is_windows = is_windows;
var sys_extension;
switch (os.type()) {
  case "Darwin":
  case "FreeBSD":
  case "Linux":
  case "OpenBSD":
  case "Windows_NT":
    sys_extension = "." + os.platform();
    break;
  default:
    throw "Not supported " + os.type();
}

exports.sys_extension = sys_extension;
var make = is_bsd ? "gmake" : "make";
exports.make = make;