Add native extensions for the Dart shell to mac and windows

runtime/bin/bin.gypi

Index: runtime/bin/bin.gypi
diff --git a/runtime/bin/bin.gypi b/runtime/bin/bin.gypi
index 27567b274ba43d328679bdc7082601e65528c2d4..8b90822f7d480958e2a9011c32aee9bb86626c2c 100644
--- a/runtime/bin/bin.gypi
+++ b/runtime/bin/bin.gypi
@@ -342,7 +342,13 @@
           'link_settings': {
             'libraries': [ '-lws2_32.lib', '-lRpcrt4.lib' ],
           },
-       }]],
+          'msvs_settings': {

[Mads Ager (google), 2012/03/06 15:32:50]

Please add a comment that this linker settings forces the generation of a link
library.

[Søren Gjesse, 2012/03/07 06:58:31]

Should we perhaps add the same for the dart_no_snapshot target below?

[Ivan Posva, 2012/03/07 07:22:51]

The dart_no_snapshot target is not shipped as part of the SDK and is generally
only used during development of the VM. In particular during development of
first stages of loading sources. Just avoid the complication of creating link
library.

+            'VCLinkerTool': {
+              'AdditionalOptions': [ '/EXPORT:Dart_True' ],
+            },
+          },
+        }],
+       ],
     },
     {
       # dart binary without any snapshot built in.
@@ -417,27 +423,29 @@
         }],
       ],
     },
-  ],
-  'conditions': [
-    ['OS=="linux"', {
-      'targets': [
-        {
-          'target_name': 'test_extension',
-          'type': 'shared_library',
-          'dependencies': [
-          ],
-          'include_dirs': [
-            '.',
-          ],
-          'sources': [
-            'test_extension_linux.cc',
-          ],
-          'defines': [
-            'DART_SHARED_LIB',
-          ],
-        },
+    {
+      'target_name': 'test_extension',
+      'type': 'shared_library',
+      'dependencies': [
+        'dart',
+      ],
+      'include_dirs': [
+        '..',
+      ],
+      'sources': [
+        'test_extension.cc',
+        'test_extension_dllmain_win.cc',
+      ],
+      'defines': [
+        'DART_SHARED_LIB',
       ],
-    }],
+      'msvs_settings': {
+        'VCLinkerTool': {
+          'AdditionalDependencies': [ 'dart.lib' ],
+          'AdditionalLibraryDirectories': [ '<(PRODUCT_DIR)' ],
+        },
+      },
+    },
   ],
 }