From 51f42fdea17cdc143768ada076a0284acba3be7f Mon Sep 17 00:00:00 2001
From: Christian Heimes <christian@python.org>
Date: Sun, 25 Apr 2021 11:57:58 +0200
Subject: [PATCH] bpo-43466: Link with libz in PY_UNSUPPORTED_OPENSSL_BUILD
 path

Some OpenSSL build flavors need libz for compression support.
---
 setup.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/setup.py b/setup.py
index 4f4b42d1d9d6ac..e6193538b61a87 100644
--- a/setup.py
+++ b/setup.py
@@ -2466,7 +2466,8 @@ def split_var(name, sep):
                 extra_linker_args.append(f"-Wl,--exclude-libs,lib{lib}.a")
             openssl_extension_kwargs["extra_link_args"] = extra_linker_args
             # don't link OpenSSL shared libraries.
-            openssl_extension_kwargs["libraries"] = []
+            # include libz for OpenSSL build flavors with compression support
+            openssl_extension_kwargs["libraries"] = ["z"]
 
         self.add(
             Extension(