1 files changed, 55 insertions, 0 deletions
diff --git a/source4/build/pidl/compat.pm b/source4/build/pidl/compat.pm
new file mode 100644
index 0000000000..3ab94b70f3
--- /dev/null
+++ b/source4/build/pidl/compat.pm
@@ -0,0 +1,55 @@
+###################################################
+# IDL Compatibility checker
+# Copyright jelmer@samba.org 2005
+# released under the GNU GPL
+
+package IDLCompat;
+
+use strict;
+
+my($res);
+
+sub warning($$)
+{
+	my $l = shift;
+	my $m = shift;
+
+	print "$l->{FILE}:$l->{LINE}:$m\n";
+}
+
+sub CheckInterface($)
+{
+	my $if = shift;
+	if (util::has_property($if, "pointer_default_top")) {
+		warning($if, "pointer_default_top() is pidl-specific");
+	}
+
+	foreach my $x (@{$if->{DATA}}) {
+		if ($x->{TYPE} eq "DECLARE") {
+			warning($if, "the declare keyword is pidl-specific");
+			next;
+		}
+
+		if ($x->{TYPE} eq "TYPEDEF") {
+			if ($x->{DATA}->{TYPE} eq "UNION") {
+				if (util::has_property($x, "nodiscriminant")) {
+					warning($x, "nodiscriminant property is pidl-specific");
+				}
+			}
+		}
+	}
+}
+
+sub Check($)
+{
+	my $pidl = shift;
+	my $res = "";
+
+	foreach my $x (@{$pidl}) {
+		CheckInterface($x) if ($x->{TYPE} eq "INTERFACE");
+	}
+
+	return $res;
+}
+
+1;