From 9b54dd8e185291f6656fca3f38da1c38947c8dd6 Mon Sep 17 00:00:00 2001
From: Chris Johns <chrisj@rtems.org>
Date: Fri, 27 Oct 2017 17:22:12 +1100
Subject: sb: Add a defined check.

Updates #3210.
---
 source-builder/sb/macros.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/source-builder/sb/macros.py b/source-builder/sb/macros.py
index 2af8d36..28a52b2 100644
--- a/source-builder/sb/macros.py
+++ b/source-builder/sb/macros.py
@@ -447,6 +447,9 @@ class macros:
             if key in self.macros[map]:
                 del self.macros[map][key]
 
+    def defined(self, key, globals = True, maps = None):
+        return self.get(key, globals, maps) is not None
+
     def expand(self, _str):
         """Simple basic expander of config file macros."""
         expanded = True
-- 
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