ac_sub_configure=$ac_srcdir/configure.gnu
elif test -f "$ac_srcdir/configure"; then
ac_sub_configure=$ac_srcdir/configure
- elif test -f "$ac_srcdir/configure.in"; then
+ elif test -f "$ac_srcdir/configure.ac"; then
# This should be Cygnus configure.
ac_sub_configure=$ac_aux_dir/configure
else