>=dev-lang/php-5.2.2 USE=pdo hash pcntl pcre cli mysql apache2 curl ctype reflection posix
>=virtual/mysql-5
sys-apps/portage # In case you use paludis
sys-apps/sed
www-servers/apache APACHE2_MODULES=rewrite
>=sys-fs/squashfs-tools-4
JFFS2: sys-fs/mtd-utils
net-misc/ntp