--- a/setup.py	Thu May 04 17:13:12 2017 +0900
+++ b/setup.py	Sat May 20 14:01:05 2017 -0700
@@ -638,7 +638,8 @@
     Extension('mercurial.cext.parsers', ['mercurial/cext/dirs.c',
                                          'mercurial/cext/manifest.c',
                                          'mercurial/cext/parsers.c',
-                                         'mercurial/cext/pathencode.c'],
+                                         'mercurial/cext/pathencode.c',
+                                         'mercurial/cext/revlog.c'],
               include_dirs=common_include_dirs,
               depends=common_depends),
     Extension('mercurial.cext.osutil', ['mercurial/cext/osutil.c'],