c++ - Class declarations -


so i'm looking @ ogre character sample, , there's class declared as

class _ogresampleclassexport sample_character : public sdksample

the classes identifier sample_character , derived sdksample class. _ogresampleclassexport though?

on windows platforms _ogresampleclassexport macro used specify dll linkage of class' members. if macro expands __declspec(dllimport) members exist in external dll , must imported. if expands __declspec(dllexport) members exist in dll being built , exported. if macro blank members linked statically , not exit in dll.

on other platforms works in same way. on linux when compiling gcc macro expands __attribute__ ((visibility("???"))) "???" specifies linkage in similar fashion used in __declspec().


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