tools/automake/patches/100-aclocal-skip-not-existing-directories.patch

   1 --- a/bin/aclocal.in
   2 +++ b/bin/aclocal.in
   3 @@ -371,6 +371,12 @@ sub scan_m4_dirs ($$@)
   4
   5    foreach my $m4dir (@dirlist)
   6      {
   7 +      if (! -d $m4dir)
   8 +        {
   9 +          msg ('override', "warning: skipping not existing directory `$m4dir'");
  10 +          next;
  11 +        }
  12 +
  13        if (! opendir (DIR, $m4dir))
  14         {
  15           # TODO: maybe avoid complaining only if errno == ENONENT?