From 40a3008632abd8bb393eefc212547456f2a5cb25 Mon Sep 17 00:00:00 2001
From: Heinrich Schuchardt <xypron.glpk@gmx.de>
Date: Tue, 6 Oct 2020 17:56:59 +0200
Subject: [PATCH] doc: Sphinx.override_domain() deprecated

Sphinx.override_domain() is deprecated since Sphinx 1.8 and removed in
Sphinx 3.

Use Sphinx.add_domain(, override=True) instead.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
---
 doc/sphinx/cdomain.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/doc/sphinx/cdomain.py b/doc/sphinx/cdomain.py
index cf13ff3a65..cbac8e608d 100644
--- a/doc/sphinx/cdomain.py
+++ b/doc/sphinx/cdomain.py
@@ -48,7 +48,10 @@ major, minor, patch = sphinx.version_info[:3]
 
 def setup(app):
 
-    app.override_domain(CDomain)
+    if (major == 1 and minor < 8):
+        app.override_domain(CDomain)
+    else:
+        app.add_domain(CDomain, override=True)
 
     return dict(
         version = __version__,
-- 
2.39.5