From 7900a9bd388cff65ba98e4fa09b296eb1f4f815e Mon Sep 17 00:00:00 2001
From: Hiroshi SHIBATA <hsbt@ruby-lang.org>
Date: Mon, 29 Aug 2022 17:42:49 +0900
Subject: Backport https://github.com/ruby/ruby/pull/6193

Co-authored-by: Yuta Saito <kateinoigakukun@gmail.com>
---
 lib/mkmf.rb | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'lib')

diff --git a/lib/mkmf.rb b/lib/mkmf.rb
index 9468a2c6c4..9435404584 100644
--- a/lib/mkmf.rb
+++ b/lib/mkmf.rb
@@ -2034,6 +2034,11 @@ sitearch = #{CONFIG['sitearch']}
 ruby_version = #{RbConfig::CONFIG['ruby_version']}
 ruby = #{$ruby.sub(%r[\A#{Regexp.quote(RbConfig::CONFIG['bindir'])}(?=/|\z)]) {'$(bindir)'}}
 RUBY = $(ruby#{sep})
+BUILTRUBY = #{if defined?($builtruby) && $builtruby
+    $builtruby
+  else
+    File.join('$(bindir)', CONFIG["RUBY_INSTALL_NAME"] + CONFIG['EXEEXT'])
+  end}
 ruby_headers = #{headers.join(' ')}
 
 RM = #{config_string('RM', &possible_command) || '$(RUBY) -run -e rm -- -f'}
-- 
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