At a glance, it seems like autoconf is the likely culprit, but you never know. That's as far as I can diagnose the problem. Any ideas?
This is documented new behavior of 2.64: ** The m4sh macros AS_IF and AS_CASE can now be used in shell lists. The responsibility for supplying a trailing newline now belongs to the call site, but since most users did not add dnl, this generally results in fewer empty lines in configure. Hope this helps, Paolo
