visibility_control.h

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// Copyright 2017, Open Source Robotics Foundation, Inc. All rights reserved.
//
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// modification, are permitted provided that the following conditions are met:
//
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//      notice, this list of conditions and the following disclaimer in the
//      documentation and/or other materials provided with the distribution.
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//      this software without specific prior written permission.
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#ifndef TF2__VISIBILITY_CONTROL_H_
#define TF2__VISIBILITY_CONTROL_H_
 
// 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 TF2_EXPORT __attribute__ ((dllexport))
    #define TF2_IMPORT __attribute__ ((dllimport))
  #else
    #define TF2_EXPORT __declspec(dllexport)
    #define TF2_IMPORT __declspec(dllimport)
  #endif
  #ifdef TF2_BUILDING_DLL
    #define TF2_PUBLIC TF2_EXPORT
  #else
    #define TF2_PUBLIC TF2_IMPORT
  #endif
  #define TF2_PUBLIC_TYPE TF2_PUBLIC
  #define TF2_LOCAL
#else
  #define TF2_EXPORT __attribute__ ((visibility("default")))
  #define TF2_IMPORT
  #if __GNUC__ >= 4
    #define TF2_PUBLIC __attribute__ ((visibility("default")))
    #define TF2_LOCAL  __attribute__ ((visibility("hidden")))
  #else
    #define TF2_PUBLIC
    #define TF2_LOCAL
  #endif
  #define TF2_PUBLIC_TYPE
#endif
 
#endif  // TF2__VISIBILITY_CONTROL_H_