Change extension setup() return value to a dictionary of metadata.

This makes it possible to introduce more metadata values later.

1 files changed, 1 insertions, 1 deletions

diff --git a/sphinx/ext/linkcode.py b/sphinx/ext/linkcode.py
index bbb0698cd..a0b4d0da5 100644
--- a/sphinx/ext/linkcode.py
+++ b/sphinx/ext/linkcode.py
@@ -71,4 +71,4 @@ def doctree_read(app, doctree):
 def setup(app):
     app.connect('doctree-read', doctree_read)
     app.add_config_value('linkcode_resolve', None, '')
-    return sphinx.__version__
+    return {'version': sphinx.__version__}