diff -Naur a/llvm/docs/conf.py b/llvm/docs/conf.py

--- a/llvm/docs/conf.py	2020-09-15 09:12:24.318287611 +0000

+++ b/llvm/docs/conf.py	2020-09-15 15:01:00.025893199 +0000

@@ -36,20 +36,7 @@

     '.rst': 'restructuredtext',

 }

-try:

-  import recommonmark

-except ImportError:

-  # manpages do not use any .md sources

-  if not tags.has('builder-man'):

-    raise

-else:

-  import sphinx

-  if sphinx.version_info >= (3, 0):

-    # This requires 0.5 or later.

-    extensions.append('recommonmark')

-  else:

-    source_parsers = {'.md': 'recommonmark.parser.CommonMarkParser'}

-  source_suffix['.md'] = 'markdown'

+import sphinx

 # The encoding of source files.

 #source_encoding = 'utf-8-sig'