From 399fa5ca56ed5d6fff4bfde28ec63c89af6258e6 Mon Sep 17 00:00:00 2001
From: Sutou Kouhei <kou@clear-code.com>
Date: Fri, 18 Oct 2024 11:32:12 +0900
Subject: [PATCH] Don't use mkmf to generate dummy Makefile

GitHub: fix GH-153

mkmf requires fileutils. JRuby doesn't like it.
---
 ext/fiddle/extconf.rb | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/ext/fiddle/extconf.rb b/ext/fiddle/extconf.rb
index 28999806..e4bd46fd 100644
--- a/ext/fiddle/extconf.rb
+++ b/ext/fiddle/extconf.rb
@@ -1,11 +1,17 @@
 # frozen_string_literal: true
-require 'mkmf'
 
 unless RUBY_ENGINE == "ruby"
-  File.write('Makefile', dummy_makefile("").join)
+  File.write('Makefile', <<-MAKEFILE)
+all install clean:
+	#{CONFIG["NULLCMD"]}
+
+.PHONY: all install clean
+  MAKEFILE
   return
 end
 
+require 'mkmf'
+
 # :stopdoc:
 
 def gcc?