undefined reference to `errno'

Hi! After configuring PHP 4.3.1 on Linux, I would only like to 'make install-cli' but I get several "undefined reference to `errno'" errors in the bundled mysql library files. I assume this is a common problem, and the details I have provided are enough. In case this is something special, then feel free to ask for more details ;) BTW I have all the tools needed, and althought I had libtool 1.4.2 which is not advised on php.net/anoncvs, I have upgraded to libtool 1.4.3. This had no impact on my problems... The version numbers of the tools needed seem to be ok. Thanks for any help, Goba