[ng] cleanup: don't support $(ACLOCAL_M4_SOURCES) anymore, it's obsolete

The $(ACLOCAL_M4_SOURCES) variables has been since long obsolete and
basically unused (since at least commit ab57cf28 of 2003-04-24), so
drop any mention of it.

* automake.in (scan_aclocal_m4): Don't bother warning about usages of
$(ACLOCAL_M4_SOURCES).  Don't append it to @ac_deps.  This makes such
variable always empty, so there's no need to return it.  Adjust the
signature of this function accordingly, and ...
(handle_configure): ... update this function accordingly.

Signed-off-by: Stefano Lattarini <stefano.lattarini@gmail.com>

diff --git a/automake.in b/automake.in
index c0fcd5b09a825bc3ea7193317aa7d497e51662e4..09b43fffbfb93b8df69893fc7ff4cf0b5d86a02c 100644 (file)
--- a/automake.in
+++ b/automake.in
@@ -3826,10 +3826,11 @@ sub handle_subdirs ()
 }
 
 
-# ($REGEN, @DEPENDENCIES)
+# $REGEN
 # &scan_aclocal_m4
 # ----------------
-# If aclocal.m4 creation is automated, return the list of its dependencies.
+# If aclocal.m4 creation is automated, return "aclocal.m4",
+# otherwise return 0.
 sub scan_aclocal_m4 ()
 {
   my $regen_aclocal = 0;
@@ -3846,21 +3847,11 @@ sub scan_aclocal_m4 ()
       $regen_aclocal = $line =~ 'generated automatically by aclocal';
     }
 
-  my @ac_deps = ();
-
-  if (set_seen ('ACLOCAL_M4_SOURCES'))
-    {
-      push (@ac_deps, '$(ACLOCAL_M4_SOURCES)');
-      msg_var ('obsolete', 'ACLOCAL_M4_SOURCES',
-              "'ACLOCAL_M4_SOURCES' is obsolete.\n"
-              . "It should be safe to simply remove it");
-    }
-
   # Note that it might be possible that aclocal.m4 doesn't exist but
   # should be auto-generated.  This case probably isn't very
   # important.
 
-  return ($regen_aclocal, @ac_deps);
+  return $regen_aclocal;
 }
 
 
@@ -3976,10 +3967,9 @@ sub handle_configure ($$$@)
   my $colon_infile = ':' . join (':', @inputs);
   $colon_infile = '' if $colon_infile eq ":$makefile.in";
   my @rewritten = rewrite_inputs_into_dependencies ($makefile, @inputs);
-  my ($regen_aclocal_m4, @aclocal_m4_deps) = scan_aclocal_m4;
+  my $regen_aclocal_m4 = scan_aclocal_m4;
   define_pretty_variable ('am__aclocal_m4_deps', TRUE, INTERNAL,
-                         @configure_deps, @aclocal_m4_deps,
-                         '$(top_srcdir)/' . $configure_ac);
+                         @configure_deps, '$(top_srcdir)/' . $configure_ac);
   my @configuredeps = ('$(am__aclocal_m4_deps)', '$(CONFIGURE_DEPENDENCIES)');
   push @configuredeps, '$(ACLOCAL_M4)' if -f 'aclocal.m4';
   define_pretty_variable ('am__configure_deps', TRUE, INTERNAL,