[3.14] gh-154551: Fix ctypes.util.find_library() in non-UTF-8 locales (GH-154552) (GH-154556)

_findLib_ld() failed to decode the localized "ld" stderr in the locale
encoding.
(cherry picked from commit 66e313f)

Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>

Author: 3 people

Lib/ctypes/util.py

@@ -421,8 +421,7 @@ def _findLib_ld(name):
             result = None
             try:
                 p = subprocess.Popen(cmd, stdout=subprocess.PIPE,
-                                     stderr=subprocess.PIPE,
-                                     universal_newlines=True)
+                                     stderr=subprocess.PIPE)
                 out, _ = p.communicate()
                 res = re.findall(expr, os.fsdecode(out))
                 for file in res:

Misc/NEWS.d/next/Library/2026-07-23-19-45-00.gh-issue-154551.Ct7pL9.rst

@@ -0,0 +1 @@
+Fix :func:`ctypes.util.find_library` returning ``None`` in non-UTF-8 locales.