Currently, the logging.h header checks the LOG4CPLUS_VERSION macro to determine whether to use std::auto_ptr or std::unique_ptr. However, the LOG4CPLUS_VERSION macro is defined in log4cplus/version.h, which is not explicitlyincluded from logging.h. Explicitly include log4cplus/version.h to ensure that the LOG4CPLUS_VERSION macro is defined.
Currently, the logging.h header checks the LOG4CPLUS_VERSION macro to determine whether to use std::auto_ptr or std::unique_ptr. However, the LOG4CPLUS_VERSION macro is defined in log4cplus/version.h, which is not explicitlyincluded from logging.h. Explicitly include log4cplus/version.h to ensure that the LOG4CPLUS_VERSION macro is defined.