message: manual check for libtool
diff: @@ -4,6 +4,10 @@ cd `dirname "$0"`/..
  echo "===== Autoconf setup script ====="
  +# check for libtool
  +$ command -v libtool >/dev/null 2>&1 || { \
  + echo "warning! libtool not found ... configure stage might fail" >&2; \
  +}
  test -d m4 || mkdir -p m4
  test -e README || ln -snf README.md README
  