FTBFS on ARM with GCC 7

There was an update in Fedora Rawhide ( its developement branch ) to GCC 7.

After this update, I am no longer able to properly build MariaDB for ARM architecture.

To be more accurate:

• the architecture is armv7hl, others are fine.
• it will compile and build, but it will fail 100% tests, that need connectoin to the server.
• the error message in all tests:
  "failed: 2013: Lost connection to MySQL server during query"

Note:

• the same can be achieved in Fedora 25 with GCC7 (downloaded from Rawhide repos)