Just to clarify the four scenarios above.....
====
Vendor: Percona rpm version: 56-5.6.26-rel74.0.el7.x86_64 mysql cmd line: ok perl script: fail
Vendor: Percona rpm version: 56-5.6.29-rel76.2.el7.x86_64 mysql cmd line: ok perl script: fail
Vendor: Percona rpm version: 57-5.7.11-4.1.el7.x86_64 mysql cmd line: ok perl script: fail
Vendor: MariaDB rpm version: 5.5.47-1.el7_2.x86_64 mysql cmd line: ok perl script: ok
Just to clarify the four scenarios above.....
====
Vendor: Percona 26-rel74. 0.el7.x86_ 64
rpm version: 56-5.6.
mysql cmd line: ok
perl script: fail
====
Vendor: Percona 29-rel76. 2.el7.x86_ 64
rpm version: 56-5.6.
mysql cmd line: ok
perl script: fail
====
Vendor: Percona 11-4.1. el7.x86_ 64
rpm version: 57-5.7.
mysql cmd line: ok
perl script: fail
====
Vendor: MariaDB 1.el7_2. x86_64
rpm version: 5.5.47-
mysql cmd line: ok
perl script: ok