--- a/mxtool/mx.py	Tue Apr 15 16:16:24 2014 +0200
+++ b/mxtool/mx.py	Tue Apr 15 19:06:26 2014 +0200
@@ -1694,6 +1694,7 @@
     parser.add_argument('--force-javac', action='store_true', dest='javac', help='use javac despite ecj.jar is found or not')
     parser.add_argument('--jdt', help='path to ecj.jar, the Eclipse batch compiler (default: ' + defaultEcjPath + ')', default=defaultEcjPath, metavar='<path>')
     parser.add_argument('--jdt-warning-as-error', action='store_true', help='convert all Eclipse batch compiler warnings to errors')
+    parser.add_argument('--jdt-show-task-tags', action='store_true', help='show task tags as Eclipse batch compiler warnings')
     parser.add_argument('--error-prone', dest='error_prone', help='path to error-prone.jar', metavar='<path>')
 
     if suppliedParser:
@@ -1919,11 +1920,15 @@
                 if not exists(jdtProperties):
                     log('JDT properties file {0} not found'.format(jdtProperties))
                 else:
-                    # convert all warnings to errors
-                    if args.jdt_warning_as_error:
+                    with open(jdtProperties) as fp:
+                        origContent = fp.read()
+                        content = origContent
+                        if args.jdt_warning_as_error:
+                            content = content.replace('=warning', '=error')
+                        if not args.jdt_show_task_tags:
+                            content = content + '\norg.eclipse.jdt.core.compiler.problem.tasks=ignore'
+                    if origContent != content:
                         jdtPropertiesTmp = jdtProperties + '.tmp'
-                        with open(jdtProperties) as fp:
-                            content = fp.read().replace('=warning', '=error')
                         with open(jdtPropertiesTmp, 'w') as fp:
                             fp.write(content)
                         toBeDeleted.append(jdtPropertiesTmp)