test_zlib stuff

Author: StanFromIreland

Lib/test/test_zlib.py

@@ -8,8 +8,16 @@
 import sys
 from test.support import bigmemtest, _1G, _4G, is_s390x
 
+zlib = import_helper.import_module('zlib', required_on=('linux', 'darwin', 'win32', 'cygwin'))
+
+# Building CPython without zlib is not supported except WASI.
+#
+# Anyone who wants build CPython this way should be prepared to patch it,
+# but the core team may help getting those patches to the main branch
+# (as that’s the place where multiple third parties can cooperate).
+#
+# For tests to pass without zlib, this file needs to be removed.
 
-zlib = import_helper.import_module('zlib')
 
 requires_Compress_copy = unittest.skipUnless(
         hasattr(zlib.compressobj(), "copy"),

pyconfig.h.in

@@ -1609,8 +1609,7 @@
 /* Define to 1 if you have the 'writev' function. */
 #undef HAVE_WRITEV
 
-/* Define if the zlib library has inflateCopy; zlib 1.2.0 (2003) added
-   inflateCopy. */
+/* Define if the zlib library has inflateCopy */
 #undef HAVE_ZLIB_COPY
 
 /* Define to 1 if you have the <zlib.h> header file. */