dll_spec.h

   1 #ifndef DLL_SPEC_H
   2 #define DLL_SPEC_H
   3
   4 #if defined _WIN32 || defined __CYGWIN__
   5
   6 #ifdef BUILDING_DLL
   7 #ifdef __GNUC__
   8 #define DLL_PUBLIC __attribute__((dllexport))
   9 #else
  10 #define DLL_PUBLIC                                                             \
  11   __declspec(                                                                  \
  12       dllexport) // Note: actually gcc seems to also supports this syntax.
  13 #endif
  14 #else
  15 #ifdef __GNUC__
  16 #define DLL_PUBLIC __attribute__((dllimport))
  17 #else
  18 #define DLL_PUBLIC                                                             \
  19   __declspec(                                                                  \
  20       dllimport) // Note: actually gcc seems to also supports this syntax.
  21 #endif
  22 #endif
  23 #define DLL_LOCAL
  24
  25 #else
  26
  27 #if __GNUC__ >= 4
  28 #define DLL_PUBLIC __attribute__((visibility("default")))
  29 #define DLL_LOCAL __attribute__((visibility("hidden")))
  30 #else
  31 #define DLL_PUBLIC
  32 #define DLL_LOCAL
  33 #endif
  34
  35 #endif
  36
  37 #endif // DLL_SPEC_H