Zend compile problem on Solaris 8

PHP seems to configure just fine with: # ./configure --with-mysql=/usr/local/mysql --with-apache=../apache_1.3.23 --e nable-track-vars --disable-short-tags However, when I do a make I get the following error: zend_llist.c: In function `zend_llist_apply_with_arguments': zend_llist.c:239: `__builtin_va_alist' undeclared (first use in this function) zend_llist.c:239: (Each undeclared identifier is reported only once zend_llist.c:239: for each function it appears in.) make[1]: *** [zend_llist.lo] Error 1 make[1]: Leaving directory `/usr/local/src/php-4.1.2/Zend' make: *** [all-recursive] Error 1 I just did a build on a FreeBSD box without any problems, so I'm thinking its box related. Like I don't have a particular library in my path or something like that. If you know what this relates too, please let me know. I've looked around for this particular problem and couldn't come up with anything similar. Thanks for you help, T.