try this:
apt-get install default-libmysqlclient-dev

then install everything again with the CPAN according to install.txt...

I have the exact same problem on debian. Any clue?

Hi, we are trying to install the xfile sharing free on a ubuntu 16.04 server. But, we have some troubles. See the output from the ssh shell, when I try to run the install.cgi: Content-type: text/html <h1>Software error:</h1> <pre>Can't use 'defined(@array)' (Maybe you should just omit the defined()?...