Error compiling php

Hello - I am attempting to upgrade one of our older PHP servers (4.0.1pl2) to PHP 4.3.0. We are running a fairly old version of apache (1.3.12) and MySQL (3.22.32). My question is - does PHP 4.3.0 support older versions of MySQL? When I go to configure PHP 4.3.0 it works fine, but during compile I get the following errors: lmysqlclient -lpng -lz -ljpeg -lz -lcrypt -lresolv -lm -ldl -lnsl -lcrypt -o sapi/cli/php ext/mysql/php_mysql.o: In function `zif_mysql_client_encoding': /home/aplocher/php-4.3.0/ext/mysql/php_mysql.c:1077: undefined reference to `mysql_character_set_name' ext/mysql/php_mysql.o: In function `zif_mysql_real_escape_string': /home/aplocher/php-4.3.0/ext/mysql/php_mysql.c:1671: undefined reference to `mysql_real_escape_string' collect2: ld returned 1 exit status make: *** [sapi/cli/php] Error 1 My configure string looks like this - the MySQL directory should be fine because this configure string is exactly the same as the one used for 4.0.1pl2 (minus the GD/graphics stuff): './configure' '--with-mysql=/usr/local/mysql' '--with-apache=../apache_1.3.12' '--enable-track-vars' '--with-gd' '--with-jpeg-dir=/usr/lib' '--with-zlib-dir=/usr/local/lib' Any help would be really great. Thanks -Adam