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

   1 --- a/aclocal.in
   2 +++ b/aclocal.in
   3 @@ -310,6 +310,12 @@ 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, $m4dir))
  14         {
  15           fatal "couldn't open directory `$m4dir': $!";