MySQL 8.x GA release date?

Is there a planned release date for MySQL 8.x generally available release?

udf shared library import

I was not able to load a function in udf_example.so.  The response to CREATE FUNCTION metaphon RETURNS STRING SONAME 'udf_example.so'; is Error Code: 1126. Can't open shared library 'udf_example.so' (errno: 0 /usr/lib64/mysql/plugin/udf_example.so: cannot open shared object file: No such file or