From 113e84b49b2040ff5b0315e01fec8d8909c1a7e7 Mon Sep 17 00:00:00 2001
From: Ivan Levkivskyi <levkivskyi@gmail.com>
Date: Tue, 17 Feb 2026 11:11:03 +0000
Subject: [PATCH] Try fixing Cygwin build

---
 mypyc/lib-rt/base64/librt_base64.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/mypyc/lib-rt/base64/librt_base64.c b/mypyc/lib-rt/base64/librt_base64.c
index 75e82cb185bfe..4476c016a5757 100644
--- a/mypyc/lib-rt/base64/librt_base64.c
+++ b/mypyc/lib-rt/base64/librt_base64.c
@@ -1,6 +1,9 @@
 #define PY_SSIZE_T_CLEAN
 #include <Python.h>
 #include <stdbool.h>
+
+#define BASE64_EXPORTS
+
 #include "librt_base64.h"
 #include "libbase64.h"
 #include "pythoncapi_compat.h"