php install problems

hi all, after compiling php 4.2.3 for apache 2.0.43 i get this massages Syntax error on line 231 of /usr/local/apache2/conf/httpd.conf: Cannot load /usr/local/apache2/modules/libphp4.so into server: /usr/local/apache2/modules/libphp4.so: Undefined symbol "pthread_getspecific" the os is FreeBSD 4.6 i tried different apaches and different php versions. the first time i used the BSD ports but i got compiling php errors. after trying 3 -4 different versions of apaches with PHPs i still get the same error. apache runs fine without the LoadModule php4_module modules/libphp4.so line... for apache i just used the standard installation procedure: ./configure; make; make install for php: ./configure --with-mysql --with-apxs2=/my/path/to/apxs i found documentation to use also --with-trms-pth which i did installing first the gnu pth-1.4.1 package every time i get the same error... so now i'm out of options and any suggestion or help will be appreciated... thanks...