.. _program_listing_file_include_urdf_visibility_control.hpp:

Program Listing for File visibility_control.hpp
===============================================

|exhale_lsh| :ref:`Return to documentation for file <file_include_urdf_visibility_control.hpp>` (``include/urdf/visibility_control.hpp``)

.. |exhale_lsh| unicode:: U+021B0 .. UPWARDS ARROW WITH TIP LEFTWARDS

.. code-block:: cpp

   /*********************************************************************
   * Software License Agreement (BSD License)
   *
   *  Copyright (c) 2017, Open Source Robotics Foundation, Inc.
   *  All rights reserved.
   *
   *  Redistribution and use in source and binary forms, with or without
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   *
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   *   * Redistributions in binary form must reproduce the above
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   *     with the distribution.
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   *     contributors may be used to endorse or promote products derived
   *     from this software without specific prior written permission.
   *
   *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   *  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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   *  LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
   *  ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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   *********************************************************************/
   
   /* This header must be included by all urdf headers which declare symbols
    * which are defined in the urdf library. When not building the urdf
    * library, i.e. when using the headers in other package's code, the contents
    * of this header change the visibility of certain symbols which the urdf
    * library cannot have, but the consuming code must have inorder to link.
    */
   
   #ifndef URDF__VISIBILITY_CONTROL_HPP_
   #define URDF__VISIBILITY_CONTROL_HPP_
   
   // This logic was borrowed (then namespaced) from the examples on the gcc wiki:
   //     https://gcc.gnu.org/wiki/Visibility
   
   #if defined _WIN32 || defined __CYGWIN__
     #ifdef __GNUC__
       #define URDF_EXPORT __attribute__ ((dllexport))
       #define URDF_IMPORT __attribute__ ((dllimport))
     #else
       #define URDF_EXPORT __declspec(dllexport)
       #define URDF_IMPORT __declspec(dllimport)
     #endif
     #ifdef URDF_BUILDING_LIBRARY
       #define URDF_PUBLIC URDF_EXPORT
     #else
       #define URDF_PUBLIC URDF_IMPORT
     #endif
     #define URDF_PUBLIC_TYPE URDF_PUBLIC
     #define URDF_LOCAL
   #else
     #define URDF_EXPORT __attribute__ ((visibility("default")))
     #define URDF_IMPORT
     #if __GNUC__ >= 4
       #define URDF_PUBLIC __attribute__ ((visibility("default")))
       #define URDF_LOCAL  __attribute__ ((visibility("hidden")))
     #else
       #define URDF_PUBLIC
       #define URDF_LOCAL
     #endif
     #define URDF_PUBLIC_TYPE
   #endif
   
   #endif  // URDF__VISIBILITY_CONTROL_HPP_