--with-dom crashes

I am trying to set up php4 but I am getting an error setting up dom ./configure \ --with-apxs=/usr/www/bin/apxs \ --disable-debug \ --enable-safe-mode \ --enable-trans-sid \ --enable-track-vars \ --with-mysql=/usr/local/mysql \ --with-pgsql=/usr/local/pgsql \ --with-magic-quotes \ --with-dom=/usr/local \ --enable-xml Here is the error produced. What am I doing wrong? Any ideas? (libxml2 is installed) OS is Solaris 2.7 make[1]: Entering directory `/src/php-4.0.3pl1/ext' Making all in domxml make[2]: Entering directory `/src/php-4.0.3pl1/ext/domxml' make[3]: Entering directory `/src/php-4.0.3pl1/ext/domxml' /bin/sh /src/php-4.0.3pl1/libtool --silent --mode=compile gcc -I. -I/src/php-4.0.3pl1/ext/domxml -I/src/php-4.0.3pl1 -I/src/php-4.0.3pl1/main -I/usr/www/include -I/src/php-4.0.3pl1/Zend -I/src/php-4.0.3pl1 -I/usr/local/include -I/usr/local/mysql/include -I/src/php-4.0.3pl1/ext/xml/expat/xmltok -I/src/php-4.0.3pl1/ext/xml/expat/xmlparse -I/src/php-4.0.3pl1/TSRM -D_POSIX_PTHREAD_SEMANTICS -DEAPI -DXML_BYTE_ORDER=21 -g -O2 -c php_domxml.c php_domxml.c: In function `php_minit_domxml': php_domxml.c:162: `XML_GLOBAL_NAMESPACE' undeclared (first use in this function) php_domxml.c:162: (Each undeclared identifier is reported only once php_domxml.c:162: for each function it appears in.) make[3]: *** [php_domxml.lo] Error 1 make[3]: Leaving directory `/src/php-4.0.3pl1/ext/domxml' make[2]: *** [all-recursive] Error 1 make[2]: Leaving directory `/src/php-4.0.3pl1/ext/domxml' make[1]: *** [all-recursive] Error 1 make[1]: Leaving directory `/src/php-4.0.3pl1/ext' make: *** [all-recursive] Error 1