myenv/lib/python3.11/site-packages/cmake_modules/snappy.diff

# Licensed to the Apache Software Foundation (ASF) under one
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# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License.  You may obtain a copy of the License at
#
#   http://www.apache.org/licenses/LICENSE-2.0
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# software distributed under the License is distributed on an
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# https://github.com/google/snappy/pull/172

diff --git a/snappy.cc b/snappy.cc
index d414718..5b0d0d6 100644
--- a/snappy.cc
+++ b/snappy.cc
@@ -83,6 +83,7 @@
 #include <string>
 #include <utility>
 #include <vector>
+#include <functional>
 
 namespace snappy {