Problem compiling PHP 5 with MySQLi (64bit)

Hi,

I am trying to compile PHP 5 with mysqli support:

./configure --with-mysqli

The result is an error message and I cannot find out how to avoid this
error message:

checking for MySQLi support... yes
checking whether to enable embedded MySQLi support... no
checking for mysql_set_server_option in -lmysqlclient... no
configure: error: wrong mysql library version or lib not found. Check
config.log for more information.

I am using PHP 5.0.2 and MySQL 4.1.7 for Intel EM64T.

Any hint what I can try?

Sascha