X-Git-Url: https://oss.titaniummirror.com/gitweb/?p=nesc.git;a=blobdiff_plain;f=src%2Fnesc-task.c;fp=src%2Fnesc-task.c;h=c732a33e6a8881179520fb1227fde1440d0fa599;hp=5d36bb661a7c4b277efcf6b06e687568703836f1;hb=7b54393e237ed8f23c0c74f0a6cbc8de26c5bf98;hpb=57d4530c4d6814fa25338a00cc65b95938c723b6

diff --git a/src/nesc-task.c b/src/nesc-task.c
index 5d36bb6..c732a33 100644
--- a/src/nesc-task.c
+++ b/src/nesc-task.c
@@ -340,7 +340,27 @@ void wire_scheduler(module m)
   struct endp m_end, scheduler_end;
 
   if (!scheduler_interface)
-    return;
+    {
+      declaration task;
+      static int use_module = 0;
+
+      /* If all_tasks is non-null, we have a problem: a task that needs to
+	 be wired, but the scheduler is not yet available. Report as an error.
+      */
+      scan_declaration (task, all_tasks)
+	{
+	  error_with_location(task->location, "scheduler depends on a task");
+	  if (!use_module)
+	    {
+	      use_module = 1;
+	      error_with_location(task->location,
+				  "The -fnesc_scheduler flag should specify a module");
+	      error_with_location(task->location,
+				  "(the module with the scheduling code, even if the scheduler is a configuration)");
+	    }
+	}
+      return;
+    }
 
   m_end.component = NULL;
   m_end.function = NULL;