From 50aff5fc5ccc5b7c64ad5dcbf2a2d125436b85a0 Mon Sep 17 00:00:00 2001
From: Carlo Bramini <carlo_bramini@users.sourceforge.net>
Date: Fri, 15 May 2026 16:29:26 +0200
Subject: [PATCH] gh-149831: Fix ctypes DLL library name on Cygwin (#149832)

Co-authored-by: Victor Stinner <vstinner@python.org>
---
 Lib/ctypes/__init__.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/Lib/ctypes/__init__.py b/Lib/ctypes/__init__.py
index 0b84a27f8c6d..890168cc9809 100644
--- a/Lib/ctypes/__init__.py
+++ b/Lib/ctypes/__init__.py
@@ -549,9 +549,11 @@ pydll = LibraryLoader(PyDLL)
 
 if _os.name == "nt":
     pythonapi = PyDLL("python dll", None, _sys.dllhandle)
-elif _sys.platform in ["android", "cygwin"]:
+elif _sys.platform == "android":
     # These are Unix-like platforms which use a dynamically-linked libpython.
     pythonapi = PyDLL(_sysconfig.get_config_var("LDLIBRARY"))
+elif _sys.platform == "cygwin":
+    pythonapi = PyDLL(_sysconfig.get_config_var("DLLLIBRARY"))
 else:
     pythonapi = PyDLL(None)
 
-- 
2.47.3