bpo-43466: Link with libz in PY_UNSUPPORTED_OPENSSL_BUILD path (GH-25587)

tiran · web-flow · commit 5f87915d4af7 · 2021-04-26T15:13:34.000+02:00
Some OpenSSL build flavors need libz for compression support.
diff --git 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(
