runtime/export.h

   1 /* Copyright (C) 1999-2007 Henry Cejtin, Matthew Fluet, Suresh
   2  *    Jagannathan, and Stephen Weeks.
   3  * Copyright (C) 1997-2000 NEC Research Institute.
   4  *
   5  * MLton is released under a BSD-style license.
   6  * See the file MLton-LICENSE for details.
   7  */
   8
   9 #ifndef _MLTON_EXPORT_H_
  10 #define _MLTON_EXPORT_H_
  11
  12 /* ------------------------------------------------- */
  13 /*                      Symbols                      */
  14 /* ------------------------------------------------- */
  15
  16 /* An external symbol is something not defined by the module
  17  * (executable or library) being built. Rather, it is provided
  18  * from a library dependency (dll, dylib, or shared object).
  19  *
  20  * A public symbol is defined in this module as being available
  21  * to users outside of this module. If building a library, this
  22  * means the symbol will be part of the public interface.
  23  *
  24  * A private symbol is defined within this module, but will not
  25  * be made available outside of it. This is typically used for
  26  * internal implementation details that should not be accessible.
  27  */
  28
  29 #if defined(_WIN32) || defined(_WIN64) || defined(__CYGWIN__)
  30 #define EXTERNAL __declspec(dllimport)
  31 #define PUBLIC   __declspec(dllexport)
  32 #define PRIVATE
  33 #else
  34 #if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4)
  35 #define EXTERNAL __attribute__((visibility("default")))
  36 #define PUBLIC   __attribute__((visibility("default")))
  37 #define PRIVATE  __attribute__((visibility("hidden")))
  38 #else
  39 #define EXTERNAL
  40 #define PUBLIC
  41 #define PRIVATE
  42 #endif
  43 #endif
  44
  45 #endif /* _MLTON_EXPORT_H_ */