Without this patch,  a number of git-based packages won't build.  How-
ever, refinements may be needed.

--- automake-1.15.old/bin/aclocal.in
+++ automake-1.15/bin/aclocal.in
@@ -351,6 +351,7 @@
 sub scan_m4_dirs ($$@)
 {
   my ($type, $err_level, @dirlist) = @_;
+  $err_level = SCAN_M4_DIRS_SILENT;
 
   foreach my $m4dir (@dirlist)
     {