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