Problems with Payflow Pro & PHP4

I am not having any luck configuring php4 with pfpro.. Everything goes just fine without it... Any help is greatly appreciated. Thanks, Mike debug.log: CONFIGURE: './configure' '--with-mysql=/usr/local' '--with-pfpro' '--with-apache=../apache_1.3.17' '--enable-track-vars' '--enable-bcmath' '--disable-debug'

CC:         gcc
CFLAGS:     -g -O2

CPPFLAGS: CXX: CXXFLAGS:

INCLUDES:    -I/usr/local/downloads/apache_1.3.17/src/include -I/usr/local/downloads/apache_1.3.17/src/os/unix  -I$(top_builddir)/Zend -I/usr/local/include/mysql -I/usr/local/include
LDFLAGS:     -R/usr/local/lib/mysql -L/usr/local/lib/mysql -R/usr/local/lib -L/usr/local/lib
LIBS:       -lpfpro -lmysqlclient -lm -lcrypt

DLIBS:

SAPI:       apache

PHP_RPATHS: /usr/local/lib/mysql /usr/local/lib uname -a: FreeBSD *********** 4.2-STABLE FreeBSD 4.2-STABLE #8: Thu

Feb  1 14:53:50 EST 2001     sturdee@***********:/usr/src/sys/compile/FDk  i386

gcc -o conftest -g -O2 -R/usr/local/lib/mysql -L/usr/local/lib/mysql -R/usr/local/lib -L/usr/local/lib conftest.c -lpfpro -lmysqlclient -lm -lcrypt 1>&5 /usr/local/lib/libpfpro.so: undefined reference to `pthread_mutex_unlock' /usr/local/lib/libpfpro.so: undefined reference to `pthread_self' /usr/local/lib/libpfpro.so: undefined reference to `pthread_mutex_destroy' /usr/local/lib/libpfpro.so: undefined reference to `pthread_mutex_lock' /usr/local/lib/libpfpro.so: undefined reference to `pthread_mutex_init'