Something

AC_PREFIX_DEFAULT(${HOME}/.e/e)
if test "x$prefix" = "xNONE"; then
  datarootdir=${ac_default_prefix}
else
  datarootdir=${prefix}/share
fi
localedir=${datarootdir}/locale
AC_SUBST(LOCALEDIR, "${localedir}")
AC_DEFINE_UNQUOTED(LOCALEDIR, "${localedir}", [Module Locale Directory])