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-rw-r--r--Documentation/conf.py6
1 files changed, 6 insertions, 0 deletions
diff --git a/Documentation/conf.py b/Documentation/conf.py
index a5c45df0bd83..44899be7b2cc 100644
--- a/Documentation/conf.py
+++ b/Documentation/conf.py
@@ -31,6 +31,12 @@ def have_command(cmd):
# Get Sphinx version
major, minor, patch = sphinx.version_info[:3]
+#
+# Warn about older versions that we don't want to support for much
+# longer.
+#
+if (major < 2) or (major == 2 and minor < 4):
+ print('WARNING: support for Sphinx < 2.4 will be removed soon.')
# If extensions (or modules to document with autodoc) are in another directory,
# add these directories to sys.path here. If the directory is relative to the