AM_AUX_DIR_EXPAND inserts this shell fragment:
am_aux_dir=`CDPATH=:; cd $ac_aux_dir && pwd` which does not work properly on MacOS X 10.1. It improperly inserts a newline at the end of the value. This trickles down to config.status, where it results in a newline appearing in the sed script fragment for symbols like ACLOCAL and AM_TAR, which breaks sed. 1) for autoconf 2.52, is there any work-around in configure.in that will allow you to override this value? 2) for future versions, what's the best replacement shell fragment? --kd