define ACLOCAL_M4 even in subdirectories

I've just discovered that automake-1.7.3 generates incomplete dependencies
for every Makefile.in not in the top level directory.  E.g.,

  $(srcdir)/Makefile.in:  Makefile.am  $(top_srcdir)/configure.in $(ACLOCAL_M4)
          ...

The problem is that ACLOCAL_M4 is defined only in the top level Makefile.in.
I've included a patch below.

Jim

[FYI, this caused coreutils-4.5.10 not to include 3 new files (all
portability-related) in spite of `make distcheck' and building/testing
on a dozen different systems.  Of course I didn't build/test on
the one system (Cygwin) that required/used those three files.  I'll
see about getting access to such a system for pre-release testing.  ]

2003-03-14  Jim Meyering  <jim@xxxxxxxxxxxx>

        * automake.in (scan_aclocal_m4): Define ACLOCAL_M4 even in
        subdirectories.  Makefile.in depends on that variable.

Index: automake.in
===================================================================
RCS file: /cvs/automake/automake/automake.in,v
retrieving revision 1.1437
diff -u -p -u -p -r1.1437 automake.in
--- automake.in 26 Feb 2003 20:53:48 -0000      1.1437
+++ automake.in 14 Mar 2003 13:24:44 -0000
@@ -4356,6 +4356,13 @@ sub scan_aclocal_m4
 {
     my $regen_aclocal = 0;
 
+    if (-f 'aclocal.m4')
+    {
+       # When using aclocal.m4, define this variable even in subdirectories,
+       # because every Makefile.in depends on $(ACLOCAL_M4).
+       &define_variable ("ACLOCAL_M4", '$(top_srcdir)/aclocal.m4');
+    }
+
     return (0, ())
       unless $relative_dir eq '.';
 
@@ -4364,7 +4371,6 @@ sub scan_aclocal_m4
 
     if (-f 'aclocal.m4')
     {
-       &define_variable ("ACLOCAL_M4", '$(top_srcdir)/aclocal.m4', INTERNAL);
        &push_dist_common ('aclocal.m4');
 
        my $aclocal = new Automake::XFile "< aclocal.m4";