Oh, that's actually a regression introduced by https://code.launchpad.net/~laurynas-biveinis/percona-xtrabackup/BT-28340-cpp-2.0/+merge/149810
-fpermissive is added for "innodb51_builtin" and "innodb50" targets, but not for their synonyms, "5.0" and "5.1".
Oh, that's actually a regression introduced by https:/ /code.launchpad .net/~laurynas- biveinis/ percona- xtrabackup/ BT-28340- cpp-2.0/ +merge/ 149810
-fpermissive is added for "innodb51_builtin" and "innodb50" targets, but not for their synonyms, "5.0" and "5.1".