From 49dddcd24b8bce1291ba7ac2a7d5cda5042e4fe3 Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@ruby-lang.org>
Date: Fri, 10 Jul 2026 19:44:41 +0900
Subject: [PATCH] Use previous RDoc on JRuby

RDoc 8.0 requires RBS, which provides the C-extension and cannot build
on JRuby.
---
 Gemfile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Gemfile b/Gemfile
index 020caab2..d88e6d5e 100644
--- a/Gemfile
+++ b/Gemfile
@@ -4,7 +4,7 @@ gemspec
 
 group :development do
   gem 'rake-compiler'
-  gem 'rdoc'
+  gem 'rdoc', *("< 8.0" if RUBY_ENGINE == "jruby")
   gem 'test-unit'
   gem 'test-unit-ruby-core'
   gem 'ruby-core-tasks', github: 'ruby/ruby-core-tasks'