>>>>> "Mark" == Mark Coletti <[EMAIL PROTECTED]> writes: Mark> If AC_LANG_CPLUSPLUS precedes AM_PROG_LIBTOOL in configure.in, the Mark> executable extension becomes ".C" instead of "" on linux systems. Mark> Swapping the order yields correct behavior. I think this must be a bug in autoconf. In any case I doubt it is an automake bug. You don't mention what version of autoconf you are using :-(. That piece of information is critical. Tom