attribute.h

#ifndef ENTT_CORE_ATTRIBUTE_H
#define ENTT_CORE_ATTRIBUTE_H
 
#ifndef ENTT_EXPORT
#    if defined _WIN32 || defined __CYGWIN__ || defined _MSC_VER
#        define ENTT_EXPORT __declspec(dllexport)
#        define ENTT_IMPORT __declspec(dllimport)
#        define ENTT_HIDDEN
#    elif defined __GNUC__ && __GNUC__ >= 4
#        define ENTT_EXPORT __attribute__((visibility("default")))
#        define ENTT_IMPORT __attribute__((visibility("default")))
#        define ENTT_HIDDEN __attribute__((visibility("hidden")))
#    else /* Unsupported compiler */
#        define ENTT_EXPORT
#        define ENTT_IMPORT
#        define ENTT_HIDDEN
#    endif
#endif
 
#ifndef ENTT_API
#    if defined ENTT_API_EXPORT
#        define ENTT_API ENTT_EXPORT
#    elif defined ENTT_API_IMPORT
#        define ENTT_API ENTT_IMPORT
#    else /* No API */
#        define ENTT_API
#    endif
#endif
 
#endif