Description:
------------
CentOS 6 with remi repository & ubuntu 13.04 having php-mysql extension compiled with libmysqlclient.so.18 library from mysql 5.5.

During 5.6 release mysql development team wasn't confirmed any major changes in library, thus just a minor library version bumped (5.5: libmysqlclient.so.18.0, 5.6: libmysqlclient.so.18.1).

Why we need major mysql version check in
./ext/mysql/php_mysql.c
./ext/mysqli/mysqli_nonapi.c
?

Currently it's not possible to deploy both libmysqlclient.so.18 libraries from 5.5 and & 5.6 in shared-compat package, because both versions are providing library file with the same major version.

Test script:
---------------
<?php
$link = mysql_connect('localhost', 'root', '');

Expected result:
----------------
Shouldn't produce any output

Actual result:
--------------
PHP Warning:  mysql_connect(): Headers and client library minor version mismatch. Headers:50534 Library:50614 in test-mysql.php on line 2