The structure is declared in the header and the export is unused as seen
with clang and -Wignored-attributes:

CommonAPI-3.2/CommonAPI/Logger.hpp:31:37: warning: 'visibility' attribute ignored when parsing type [-Wignored-attributes]
    enum class Level : std::uint8_t COMMONAPI_EXPORT {
                                    ^~~~~~~~~~~~~~~~
CommonAPI-3.2/CommonAPI/Export.hpp:19:46: note: expanded from macro 'COMMONAPI_EXPORT'
    #define COMMONAPI_EXPORT __attribute__ ((visibility ("default")))
                                             ^~~~~~~~~~~~~~~~~~~~~~

Closes: COVESA#25

Signed-off-by: Gustavo Sverzut Barbieri <[email protected]>