From 9d81487c8b57b2acbcc9d8ce627de1bd55bebd9c Mon Sep 17 00:00:00 2001
From: take_cheeze <takechi101010@gmail.com>
Date: Wed, 5 Mar 2014 14:29:45 +0900
Subject: add existing include/ directory only

---
 tasks/mrbgem_spec.rake | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tasks/mrbgem_spec.rake b/tasks/mrbgem_spec.rake
index 8cde1c12d..daf0bec3a 100644
--- a/tasks/mrbgem_spec.rake
+++ b/tasks/mrbgem_spec.rake
@@ -51,7 +51,7 @@ module MRuby
         MRuby::Gem.current = self
         @build.compilers.each do |compiler|
           compiler.include_paths << "#{dir}/include"
-        end
+        end if Dir.exist? "#{dir}/include"
         MRuby::Build::COMMANDS.each do |command|
           instance_variable_set("@#{command}", @build.send(command).clone)
         end
-- 
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