If you have error like this when starting cpanel (/etc/rc.d/init.d/cpanel4 start):

Can't load
'/usr/local/lib/perl5/site_perl/5.6.1/mach/auto/DBD/mysql/mysql.so' for
module DBD::mysql: Shared object "libmysqlclient.so.10" not found at
/usr/local/lib/perl5/5.6.1/mach/DynaLoader.pm line 206.
at /usr/local/cpanel/cpanellogd line 34
Compilation failed in require at /usr/local/cpanel/cpanellogd line 34.
BEGIN failed--compilation aborted at /usr/local/cpanel/cpanellogd line 34.
Do that:
1.go to /usr/local/lib/mysql
2.find libmysqlclient.so.* with the highest numer in a place of *
3.link it to libmysqlclient.so.10 for example:
ln -s libmysqlclient.so.12 libmysqlclient.so.10
4.Restart server od cpanel (dont know exacly cause I have restarted everything )

Tell me if this resolved you problem too

Regards