vala: Report an error if gio-2.0 is missing for DBus support

3 files changed, 21 insertions, 0 deletions

diff --git a/vala/valaclass.vala b/vala/valaclass.vala
index 9ebb17271..7d59cfaad 100644
--- a/vala/valaclass.vala
+++ b/vala/valaclass.vala
@@ -522,6 +522,10 @@ public class Vala.Class : ObjectTypeSymbol {
 			return !error;
 		}
 
+		if (!base.check (context)) {
+			return false;
+		}
+
 		checked = true;
 
 		var old_source_file = context.analyzer.current_source_file;
diff --git a/vala/valainterface.vala b/vala/valainterface.vala
index 5cd8bd446..1e0cbdaa8 100644
--- a/vala/valainterface.vala
+++ b/vala/valainterface.vala
@@ -156,6 +156,10 @@ public class Vala.Interface : ObjectTypeSymbol {
 			return !error;
 		}
 
+		if (!base.check (context)) {
+			return false;
+		}
+
 		checked = true;
 
 		var old_source_file = context.analyzer.current_source_file;
diff --git a/vala/valaobjecttypesymbol.vala b/vala/valaobjecttypesymbol.vala
index c79df83a3..c771f8541 100644
--- a/vala/valaobjecttypesymbol.vala
+++ b/vala/valaobjecttypesymbol.vala
@@ -375,4 +375,17 @@ public abstract class Vala.ObjectTypeSymbol : TypeSymbol {
 			d.accept (visitor);
 		}
 	}
+
+	public override bool check (CodeContext context) {
+		if (checked) {
+			return !error;
+		}
+
+		if (!external_package && get_attribute ("DBus") != null && !context.has_package ("gio-2.0")) {
+			error = true;
+			Report.error (source_reference, "gio-2.0 package required for DBus support");
+		}
+
+		return !error;
+	}
 }