Add support for the QNX operating system.

tools/gyp/v8.gyp

Index: tools/gyp/v8.gyp
diff --git a/tools/gyp/v8.gyp b/tools/gyp/v8.gyp
index 5baa245d5ee105b7a372b118ddd6497a981187ac..9531b6a9737cc328ff64514d6f2f73915852d713 100644
--- a/tools/gyp/v8.gyp
+++ b/tools/gyp/v8.gyp
@@ -766,6 +766,35 @@
             ],
           },
         ],
+        ['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': [