Add support for the QNX operating system.

tools/gyp/v8.gyp

 # Copyright 2012 the V8 project authors. All rights reserved.
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 #       notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 #       copyright notice, this list of conditions and the following
 #       disclaimer in the documentation and/or other materials provided
@@ skipping 748 matching lines @@
                     ],
                   }],
                 ],
                 'sources': [
                   '../../src/platform-linux.cc'
                 ]
               }],
             ],
           },
         ],
+        ['OS=="qnx"', {
+            'sources': [
+              '../../src/platform-posix.cc',
+            ],
+            'target_conditions': [
+              ['_toolset=="host" and host_os=="linux"', {
+                'sources': [
+                  '../../src/platform-linux.cc'
+                ],
+                'libraries': [
+                  '-lrt'
+                ],
+              }],
+              ['_toolset=="host" and host_os=="mac"', {
+                'sources': [
+                  '../../src/platform-macos.cc'
+                ],
+              }],
+              ['_toolset=="target"', {
+                'sources': [
+                  '../../src/platform-qnx.cc'
+                ],
+                'libraries': [
+                  '-lbacktrace', '-lsocket'
+                ],
+              }],
+            ],
+          },
+        ],
         ['OS=="freebsd"', {
             'link_settings': {
               'libraries': [
                 '-L/usr/local/lib -lexecinfo',
             ]},
             'sources': [
               '../../src/platform-freebsd.cc',
               '../../src/platform-posix.cc'
             ],
           }
@@ skipping 282 matching lines @@
         }],
         ['v8_compress_startup_data=="bz2"', {
           'libraries': [
             '-lbz2',
           ]
         }],
       ],
     },
   ],
 }