Added comment about OSF tar

diff --git a/automake.in b/automake.in
index 9f4121f..9a58889 100755 (executable)
--- a/automake.in
+++ b/automake.in
@@ -6710,6 +6710,10 @@ sub initialize_global_constants
                     . "\n");
     $dist{'dist-zip'} = ("\t" . '-rm -f $(distdir).zip' . "\n" .
                         "\t" . 'zip -rq $(distdir).zip $(distdir)' . "\n");
+
+    # Note that we don't use GNU tar's `-z' option.  One reason (but
+    # not the only reason) is that some versions of tar (e.g., OSF1)
+    # interpret `-z' differently.
     $dist{'dist'} = ("\t"
                     .  '$(AMTAR) chof - $(distdir) | GZIP=$(GZIP_ENV) gzip -c > $(distdir).tar.gz'
                     . "\n");