sys_rb_usr=/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr
sdk_rb_usr=`xcode-select -p`/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr
sudo cp -r $sdk_rb_usr/include $sys_rb_usr/include