failed build with apache 2.0.39 and default install of php 4.2.2

I'm running fbsd 4.6, with a new port tree. I've installed apache-2.0.39 via ports and it runs just fine. However, after trying to install the mod_php4 port, using only the mysql and zlib options (well, and the WITH_APACHE2 var defined as well), it runs into an error here: Configuring SAPI modules checking for AOLserver support... no checking for Apache 1.x module support via DSO through APXS... no checking for Apache 1.x module support... no checking for mod_charset compatibility option... no checking for Apache 2.0 module support via DSO through APXS... configure: error: ZTS currently requires working POSIX threads. We were unable to verify that your system supports Pthreads. And as the config.log suggests: configure:3548: checking for AOLserver support configure:3624: checking for Apache 1.x module support via DSO through APXS configure:3756: checking for Apache 1.x module support configure:3943: checking for mod_charset compatibility option configure:4013: checking for Apache 2.0 module support via DSO through APXS I'm a long time user of the fbsd ports and php alike. I've reinstalled ports and apache several times, all yielding the same results. Any suggestions? Ryan C. Creasey Network Engineer p11creative