Buildproblems in latest CVS

I'am experiencing problems building PHP from the latest cvs. The errors occur when running 'buildconf'. The box is a Debian/unstable. Autoconf, automake and libtool versions seems to suffice. aj@uranos% ./buildconf buildconf: checking installation... buildconf: autoconf version 2.52 (ok) buildconf: automake version 1.4-p4 (ok) buildconf: libtool version 1.4b 1996, (ok) rebuilding Makefile templates automake: configure.in: installing `Zend/ylwrap' rebuilding configure ./aclocal.m4:943: error: m4_defn: undefined macro: _m4_divert_diversion ./aclocal.m4:472: PHP_SUBST is expanded from... ./aclocal.m4:943: the top level rebuilding acconfig.h rebuilding main/php_config.h.in ./aclocal.m4:943: error: m4_defn: undefined macro: _m4_divert_diversion ./aclocal.m4:472: PHP_SUBST is expanded from... ./aclocal.m4:943: the top level autoconf2.50: tracing failed aj@uranos% Any help is much appreciated. /A