mysql.h location???

I'm trying to install php5.1.2. on Suse 9.2. I keep getting a configure error: Cannot find mysql header files under /usr/include or any other of the various paths I've tried. using the locate command yields no results for "locate mysql.h" The mysql server is running, I've added databases and tables, so I'm assuming the header file has to be in there somewhere. Any ideas? This is a standard mysql install pkg which was installed with the original 9.2 install. Thanks, Regis