Effectively duplicates targets that contain rules/actions, therefore enabling...

test/msvs/prebuild/base/base.gyp

+# Copyright (c) 2010 Google Inc. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+{
+  'targets': [
+    {
+      'target_name': 'a',
+      'msvs_guid': 'B4D59AE8-8D2F-97E1-A8E9-6D2826729530', 

[Mark Mentovai, 2010/07/07 17:45:28]

Not needed (throughout this file).

+      'type': 'static_library',
+      'sources': [
+        'a.c',
+      ],
+      'actions': [ {
+          'inputs': [ 'a.idl' ],
+          'outputs': [ 'idl_a.c' ], 
+          'action': 'cp a.idl idl_a.c',
+          'action_name': 'idl',
+          'process_outputs_as_sources': '1',
+        }, 
+      ],
+    },
+    {
+      'target_name': 'b',
+      'msvs_guid': 'B4D59AE8-97E1-8D2F-A8E9-6D2826729530', 
+      'type': 'static_library',
+      'sources': [
+        'b.c',
+      ],
+      'actions': [ {
+          'inputs': [ 'b.idl' ],
+          'outputs': [ 'idl_b.c' ], 
+          'action': 'cp b.idl idl_b.c',
+          'action_name': 'idl',
+        }, 
+      ],
+    },
+    {
+      'target_name': 'c',
+      'msvs_guid': 'B4D59AE8-8D2E-97E1-A8E9-6D2826729530', 
+      'type': 'none',
+      'actions': [ {
+          'inputs': [ 'c.idl' ],
+          'outputs': [ 'idl_c.c' ], 
+          'action': 'cp c.idl idl_c.c',
+          'action_name': 'idl',
+          'process_outputs_as_sources': '1',
+        }, 
+      ],
+    },
+  ],
+}