Description: Allow building with Sphinx >= 3.2
 Additionally: Disable sphinx warnings

Bug-cython: https://bugs.python.org/issue40204
Origin: upstream, https://github.com/python/cpython/commit/423e77d6de497931585d1883805a9e3fa4096b0b

--- a/Doc/conf.py
+++ b/Doc/conf.py
@@ -77,6 +77,10 @@
 # Avoid a warning with Sphinx >= 2.0
 master_doc = 'contents'
 
+# Allow to build with Sphinx >= 3.2
+c_allow_pre_v3 = True
+c_warn_on_allowed_pre_v3 = False
+
 # Options for HTML output
 # -----------------------
 
--- a/Doc/Makefile
+++ b/Doc/Makefile
@@ -13,7 +13,7 @@
 PAPER        =
 SOURCES      =
 DISTVERSION  = $(shell $(PYTHON) tools/extensions/patchlevel.py)
-SPHINXERRORHANDLING = -W
+#SPHINXERRORHANDLING = -W
 
 # Internal variables.
 PAPEROPT_a4     = -D latex_elements.papersize=a4paper