From b623f5c149db1947d1d4879d54aee38daf679dfe Mon Sep 17 00:00:00 2001
From: "Yukihiro \"Matz\" Matsumoto" <matz@ruby.or.jp>
Date: Tue, 14 Jan 2025 13:24:16 +0900
Subject: [PATCH] mruby-io: define HAVE_MRUBY_IO_GEM if present; ref #6466

---
 mrbgems/mruby-io/mrbgem.rake | 1 +
 1 file changed, 1 insertion(+)

diff --git a/mrbgems/mruby-io/mrbgem.rake b/mrbgems/mruby-io/mrbgem.rake
index 3bb3febd3..3449484e5 100644
--- a/mrbgems/mruby-io/mrbgem.rake
+++ b/mrbgems/mruby-io/mrbgem.rake
@@ -6,5 +6,6 @@ MRuby::Gem::Specification.new('mruby-io') do |spec|
   if spec.for_windows?
     spec.linker.libraries << "ws2_32"
   end
+  spec.build.defines << "HAVE_MRUBY_IO_GEM"
   spec.add_test_dependency 'mruby-time', core: 'mruby-time'
 end