unlink Makefile.in

[Alan Modra]

As http://sources.redhat.com/ml/autoconf-patches/2001-11/msg00081.html
does for autoconf, this patch does for automake.

ChangeLog
        * automake.in (generate_makefile): Unlink output file before
        opening so that any hard links are not changed.

-- 
Alan Modra

Index: automake.in
===================================================================
RCS file: /cvs/automake/automake/automake.in,v
retrieving revision 1.1239
diff -u -p -r1.1239 automake.in
--- automake.in 2001/11/19 12:32:39     1.1239
+++ automake.in 2001/11/23 04:09:22
@@ -1309,6 +1309,11 @@ sub generate_makefile
        }
     }
 
+    if (-e "$out_file")
+    {
+       unlink ($out_file)
+           or die "$me: cannot remove $out_file: $!\n";
+    }
     my $gm_file = new Automake::XFile "> $out_file";
     verbose "creating ", $makefile, ".in";