Undefined _zlib_ptr_dtor_wrapper

Using NetBSD 2.0.2, and attempting to install php-5.0.4. My configure statement is as follows: ./configure --enable-versioning --with-pear --enable-ctype --enable-dom --wi th-pcre-regex --enable-posix --enable-session --enable-simplexml --with-sqli te --enable-tokenizer --enable-xml --enable-libxml --with-libxml-dir=/usr/pk g --with-regex=php --enable-spl --with-regex=php --with-apxs2=/usr/pkg/sbin/ apxs The configure command runs fine, and generates the makefiles and whatnot, but when I execute the 'make' command, I recieve the following errors a little bit into the make process: ext/dom/php_dom.lo(.text+0x40ab): In function `dom_objects_set_class': /var/tmp/php-5.0.4/ext/dom/php_dom.c:907: undefined reference to `_zval_ptr_dtor _wrapper' ext/simplexml/simplexml.lo(.text+0x120a): In function `sxe_properties_get': /var/tmp/php-5.0.4/ext/simplexml/simplexml.c:685: undefined reference to `_zval_ ptr_dtor_wrapper' ext/simplexml/simplexml.lo(.text+0x2310): In function `php_sxe_object_new': /var/tmp/php-5.0.4/ext/simplexml/simplexml.c:1206: undefined reference to `_zval _ptr_dtor_wrapper' *** Error code 1 Only seems to happen when I use libxml, which is installed. Any idea what is cauing this, and how I can fix it? Thanks, Dan Labute