Fix #4226: apidoc: Generate new style makefile (make-mode)

CHANGES

@@ -11,6 +11,7 @@ Incompatible changes
   package when ``--implicit-namespaces`` option given, not subdirectories of
   given directory.
 * #3929: apidoc: Move sphinx.apidoc to sphinx.ext.apidoc
+* #4226: apidoc: Generate new style makefile (make-mode)
 
 Deprecated
 ----------

sphinx/ext/apidoc.py

@@ -413,6 +413,7 @@ def main(argv=sys.argv[1:]):
             ext_todo = True,
             makefile = True,
             batchfile = True,
+            make_mode = True,
             mastertocmaxdepth = args.maxdepth,
             mastertoctree = text,
             language = 'en',