From ad1fd9285c2d7223e6d264a23d45670706088bda Mon Sep 17 00:00:00 2001
From: "Yukihiro \"Matz\" Matsumoto" <matz@ruby.or.jp>
Date: Tue, 24 Mar 2026 13:57:57 +0900
Subject: [PATCH] mirb.c: add fileno() to _fileno() mapping for MSVC

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

diff --git a/mrbgems/mruby-bin-mirb/tools/mirb/mirb.c b/mrbgems/mruby-bin-mirb/tools/mirb/mirb.c
index 511e0ce7d..481dc4a35 100644
--- a/mrbgems/mruby-bin-mirb/tools/mirb/mirb.c
+++ b/mrbgems/mruby-bin-mirb/tools/mirb/mirb.c
@@ -28,6 +28,7 @@
 #ifdef _WIN32
 #include <io.h>
 #define isatty(fd) _isatty(fd)
+#define fileno(fd) _fileno(fd)
 #else
 #include <unistd.h>
 #endif