Miscellaneous workarounds for  drop-in compatibility problems with Linux distributions, arounf versioning of the 
MySQL 5.5 client shared library. There seems to be 3 different ways major distributions handle versioning

1. Fedora  (also Mageia, and likely  other Redhat descendants) way 
   old, 5.1 API functions are given version libmysqlclient_16
   new API functions  (client plugins, mysql_stmt_next ) are given version libmysqlclient_18
   some extra functions beyond API are exported.
   some functions are renamed.

2.Debian Wheezy way 
  all functions are given libmysqlclient_18 version

3. Ubuntu  way (or MySQL/MariaDB download packages)
  no versioning

UIp to this fix, MariaDB distributions did not have any versioning in the libraries, this rendered client library incompatible to distributions 
thus exchanging  distribution's libmysqlclient.so.18.0.0  with MariaDB's did not work nicely (anywhere but on Ubuntu)


THE FIX  
is to build libraries the same way as distributions do it 
- when building RPMs, use  same version script as Fedora does, Make sure to export extra-symbols, the same as Fedora exports.
- when building DEBs, use the same version script as Debian Wheezy
- do not use version scripts otherwise


Also, makes sure that extensions of  MySQL APIs (asynchronous client functionality) is exported by  the shared libraries.