Add samples gyp target to Dart project, that builds samples/sample_extension.

samples/sample_extension/sample_extension.gypi

 # Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 # for details. 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': 'sample_extension',
       'type': 'shared_library',
       'dependencies': [
-        'dart',
+        '../runtime/dart-runtime.gyp:dart',
       ],
       'include_dirs': [
         '../../runtime/include',

[Bill Hesse, 2012/08/07 10:24:55]

I checked, and this needs to be ../../runtime, and the line above needs to be
../runtime.  What is going on?

[ahe, 2012/08/07 11:42:31]

The problem is that you didn't put the gyp file in the same directory as the
gypi file. Please don't do that. It is impossible to understand.

[Bill Hesse, 2012/08/07 12:23:19]

Fixed.  This is now a gyp file.

On 2012/08/07 11:42:31, ahe wrote:

       ],
       'sources': [
         'sample_extension.cc',
         'sample_extension_dllmain_win.cc',
       ],
       'defines': [
         'DART_SHARED_LIB',
       ],
       'conditions': [
         ['OS=="win"', {
           'msvs_settings': {
             'VCLinkerTool': {
               'AdditionalDependencies': [ 'dart.lib' ],
               'AdditionalLibraryDirectories': [ '<(PRODUCT_DIR)' ],
             },
           },
         }],
         ['OS=="mac"', {
           'xcode_settings': {
             'OTHER_LDFLAGS': [ '-undefined', 'dynamic_lookup' ],
           },
         }],
       ],
     },
   ],
 }