People used to add code like the following to their configure.ac:
LTLIBOBJS=`echo "$LIBOBJS" | sed 's/\.[^.]* /.lo /g;s/\.[^.]*$/.lo/'` AC_SUBST([LTLIBOBJS])
This is no longer required (since Autoconf 2.54), and doesn't take Automake's deansification support into account either, so doesn't work correctly even with ancient Autoconfs!
Provided you are using a recent (2.54 or better) incarnation of
Autoconf, the call to
AC_OUTPUT takes care of setting
LTLIBOBJS up correctly, so you can simply delete such snippets
from your configure.ac if you had them.