Wait! I know about "New Macros"! aclocal -I cmulocal /usr/local/share/aclocal/gtk-2.0.m4:8: underquoted definition of AM_PATH_GTK_2_0 /usr/local/share/aclocal/gtk-2.0.m4:8: run info '(automake)Extending aclocal' or see http://sources.redhat.com/automake/automake.html#Extending%20aclocal cmulocal/sasl2.m4:38: error: m4_defn: undefined macro: _m4_divert_diversion autoconf/libs.m4:134: AC_CHECK_LIB is expanded from... cmulocal/sasl2.m4:38: the top level autom4te: /usr/local/bin/gm4 failed with exit status: 1 The configure.in file begins with AC_INIT, the complaint isn't about an old automake macro, and the error happens in a macro I'm writing: if test "$gssapi" != no; then AC_CHECK_LIB([db], [db_open]) fi automake/autoconf/libtool CVS from Oct 29. Any clues on how to narrow down the problem? Cheers, Patrick