This CL adds support for extension in GYP.

pylib/gyp/input.py

Index: pylib/gyp/input.py
diff --git a/pylib/gyp/input.py b/pylib/gyp/input.py
index b09a2c8540500fab92ca4d65f1f0445c73909f57..055adff791677656dbe3f9635d7d53f4c83072b3 100644
--- a/pylib/gyp/input.py
+++ b/pylib/gyp/input.py
@@ -28,7 +28,12 @@ from gyp.common import OrderedSet
 
 
 # A list of types that are treated as linkable.
-linkable_types = ['executable', 'shared_library', 'loadable_module']
+linkable_types = [
+  'executable',
+  'shared_library',
+  'loadable_module',
+  'extension'
+]
 
 # A list of sections that contain links to other targets.
 dependency_sections = ['dependencies', 'export_dependent_settings']
@@ -1703,11 +1708,12 @@ class DependencyGraphNode(object):
       dependencies.add(self.ref)
       return dependencies
 
-    # Executables and loadable modules are already fully and finally linked.
-    # Nothing else can be a link dependency of them, there can only be
-    # dependencies in the sense that a dependent target might run an
+    # Executables, loadable modules, and extensions are already fully and
+    # finally linked.  Nothing else can be a link dependency of them, there can
+    # only be dependencies in the sense that a dependent target might run an
     # executable or load the loadable_module.
-    if not initial and target_type in ('executable', 'loadable_module'):
+    FULLY_LINKED_TYPES = ('executable', 'loadable_module', 'extension')

[pkl (ping after 24h if needed), 2014/07/09 08:07:50]

This is just a "normal" local variable. It should be just fully_linked_types
(not all caps). I'm aware that there are other cases in this file that has all
caps local variables...they are wrong too (thought you are not expected to fix
them).

[olivierrobin, 2014/07/09 12:46:27]

Done.

+    if not initial and target_type in FULLY_LINKED_TYPES:
       return dependencies
 
     # Shared libraries are already fully linked.  They should only be included
@@ -2450,7 +2456,7 @@ def ValidateTargetType(target, target_dict):
   """
   VALID_TARGET_TYPES = ('executable', 'loadable_module',
                         'static_library', 'shared_library',
-                        'none')
+                        'extension', 'none')
   target_type = target_dict.get('type', None)
   if target_type not in VALID_TARGET_TYPES:
     raise GypError("Target %s has an invalid target type '%s'.  "