gistfile1.diff

diff --git a/mrbgems/mruby-bin-mirb/mrbgem.rake b/mrbgems/mruby-bin-mirb/mrbgem.rake
index fd0b202..0cc9bb1 100644
--- a/mrbgems/mruby-bin-mirb/mrbgem.rake
+++ b/mrbgems/mruby-bin-mirb/mrbgem.rake
@@ -2,4 +2,11 @@ MRuby::Gem::Specification.new('mruby-bin-mirb') do |spec|
   spec.license = 'MIT'
   spec.authors = 'mruby developers'
   spec.bins = %w(mirb)
+
+  if MRuby::Build.current && MRuby::Build.current.name == "host"
+    if %w(/usr/include /usr/local/include /usr/pkg/include).any?{|path| File.exist?(File.join path, 'readline') }
+      spec.cc.flags << '-DENABLE_READLINE'
+      spec.linker.libraries << 'readline'
+    end
+  end
 end