Question about install PHP4 with MySQL 3.23.53

Hi, I am trying to install php4.2.3 with the support of MySQL. I use rpm to install Mysql as following: rpm -i MySQL-3.23.53a-1.i386.rpm rpm -i MySQL-client-3.23.53a-1.i386.rpm rpm -i MySQL-devel-3.23.53a-1.i386.rpm rpm -i MySQL-shared-3.23.53a-1.i386.rpm MySQL was automatically installed to many directories like /usr/bin, /usr/include, /usr/lib, .... Now when I try to install PHP4.2.3 with the following command: ./configure --with-apxs2=/usr/sbin/apxs --with-mysql=/??? --prefix=/usr/local/php I always get the information : can't find header files under /???. I have tried /usr/include/mysql and so on. No one seems to work. Does any one has any idea which file php needs? Is there a way to solve this without reinstall MySQL? Or how do I use rpm to specify the location (say /usr/local/mysql) to install those rpms? Your help will be highly appreciated! Jaleen