diff --git a/libconfig-1.4.9/contrib/libconfig-ruby/ext/extconf.rb b/libconfig-1.4.9/contrib/libconfig-ruby/ext/extconf.rb
new file mode 100644
index 0000000000000000000000000000000000000000..e6d65ca69008dd7207aaf2ca2d8f7f66437543c4
--- /dev/null
+++ b/libconfig-1.4.9/contrib/libconfig-ruby/ext/extconf.rb
@@ -0,0 +1,11 @@
+#!/usr/bin/ruby
+require "mkmf"
+
+unless pkg_config('libconfig')
+  puts 'failure: need libconfig'
+  exit 1
+end
+
+have_func('rb_block_call', 'ruby/ruby.h')
+
+create_makefile("rconfig")