QSqlDatabase::addDatabase calls mysql api mysql_library_init(), which is not thread safe

QSqlDatabase::addDatabase is thread safe as the documentation say but this function calls mysql api mysql_library_init() before applying the write lock. as per the documentation of mysql_library_init() this function is not thread safe.http://dev.mysql.com/doc/refman/5.0/en/mysql-library-init.html
This function is being called from qLibraryInit() in constructor of QMYSQLDriver().