node-gyp building.gyp

{
  'targets': [
    {
      'target_name': 'screenshot',
      'defines': [ 'V8_DEPRECATION_WARNINGS=1' ],
      'sources': [ 'aaa.cpp' ],
      'conditions': [
          ['OS=="mac"', {
              'sources': [
                    "aaa_oc.mm"
                ],
              'xcode_settings': {
                  'OTHER_CFLAGS': [
                      '-ObjC++',
                      '-fno-objc-arc'
                  ]
              }
          }]
      ]
    }
  ]
}

nw-gyp rebuild --target=v0.32.4 --arch=x64