From 95ae434710752d6619d9c69cdd0189dad380a4a6 Mon Sep 17 00:00:00 2001
From: "Yukihiro \"Matz\" Matsumoto" <matz@ruby.or.jp>
Date: Fri, 26 Dec 2025 21:21:20 +0900
Subject: [PATCH] mirb_completion.c: fix strndup for MinGW

Use _WIN32 instead of _MSC_VER to provide strndup implementation
for all Windows compilers including MinGW/MSYS.

Co-authored-by: Claude <noreply@anthropic.com>
---
 mrbgems/mruby-bin-mirb/tools/mirb/mirb_completion.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/mrbgems/mruby-bin-mirb/tools/mirb/mirb_completion.c b/mrbgems/mruby-bin-mirb/tools/mirb/mirb_completion.c
index 58f117733..06ca3317d 100644
--- a/mrbgems/mruby-bin-mirb/tools/mirb/mirb_completion.c
+++ b/mrbgems/mruby-bin-mirb/tools/mirb/mirb_completion.c
@@ -22,6 +22,10 @@
 /* Windows compatibility */
 #ifdef _MSC_VER
 #define strdup _strdup
+#endif
+
+/* strndup is not available on Windows (MSVC and MinGW) */
+#ifdef _WIN32
 static char*
 strndup(const char *s, size_t n)
 {