Big Thanks for your time and investigation!
Just for my understanding:
We need the MySQL client library only to build PHP 4.4, 5.2 since for the others version (5.3, 5.4, 5.5, 5.6, 7.0, 7.1), we use the native MySQL driver (mysqlnd) that is bundle with those PHP versions...
So if i _only_ need PHP Version 5.3 or higher i don´t need to install "libmariadbclient-dev" because we use the native MySQL driver (mysqlnd) that is bundled with those PHP versions ?
Mean´s - i can remove the "libmariadbclient-dev" from the php_compiler.pl dependencies list and start to compile ? Just as a fast workaround.