ac_abs_{builddir,srcddir} fix needed for 2.58 This broke the subversion build, probably will break other things too... http://mail.gnu.org/archive/html/autoconf-patches/2003-11/msg00008.html
Thanks for alerting me to this - should be fixed in 2.58-2. Though looks like 2.59 is imminent... ;-)
2.59-1 WORKSFORME - thanks.