checking for SSL/TLS toolkit libraries... /usr/lib
  adding "-I/usr/include/openssl" to INCLUDES
  forcing SSL_LIBS to "-lssl -lcrypto"
pkg-config: not found
Segmentation fault (core dumped)
===>  Script "configure" failed unexpectedly.
Please report the problem to clement@FreeBSD.org [maintainer] and attach the
"/usr/ports/www/apache20/work/httpd-2.0.63/config.log" including the output
of the failure of your make command. Also, it might be a good idea to provide
an overview of all packages installed on your system (e.g. an `ls
/var/db/pkg`).
*** Error code 1

Stop in /usr/ports/www/apache20.
*** Error code 1

Stop in /usr/ports/www/mod_cplusplus.
*** Error code 1

Stop in /usr/ports/net/sipxpbx.