DLLInfo.h

#pragma once
#ifdef _MSC_VER
#   undef IMAGE_FORMAT_MANAGER_API

 /* Define 'IMAGE_FORMAT_MANAGER_BUILD_DLL_EXPORT' to build a DLL of the library */
#   ifdef IMAGE_FORMAT_MANAGER_BUILD_DLL_EXPORT
#       define IMAGE_FORMAT_MANAGER_API __declspec(dllexport)
#       pragma warning (disable : 4251)

    /* Define 'IMAGE_FORMAT_MANAGER_API' before including Assimp to link to NDEVR in
     * an external DLL under Windows. Default is static linkage. */
#   elif (defined IMAGE_FORMAT_MANAGER_DLL)
#       define IMAGE_FORMAT_MANAGER_API __declspec(dllimport)
#   else
#       define IMAGE_FORMAT_MANAGER_API
#   endif
#elif QT_BUILD
#include <QtCore/QtGlobal>
#   ifdef IMAGE_FORMAT_MANAGER_BUILD_DLL_EXPORT
#       define IMAGE_FORMAT_MANAGER_API Q_DECL_EXPORT
 /* Define 'IMAGE_FORMAT_MANAGER_DLL' before including NDEVR to link to NDEVR BASE in
  * an external DLL under Windows. Default is static linkage. */
#   elif (defined IMAGE_FORMAT_MANAGER_DLL)
#       define IMAGE_FORMAT_MANAGER_API Q_DECL_IMPORT
#   else
#       define IMAGE_FORMAT_MANAGER_API
#   endif
#else
 
#   define IMAGE_FORMAT_MANAGER_API __attribute__ ((visibility("default")))
#endif // (defined _MSC_VER)