From 079b0316161503ca74919d4f35ca6f9f2af0b309 Mon Sep 17 00:00:00 2001
From: Russel Winder <russel@russel.org.uk>
Date: Fri, 28 Aug 2009 09:55:55 +0100
Subject: [PATCH] Add check to ensure the source for the required device driver
 is actually present.

---
 src/SConscript | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/SConscript b/src/SConscript
index d016ba7..4fd93dd 100644
--- a/src/SConscript
+++ b/src/SConscript
@@ -17,6 +17,8 @@
 #
 #  Author: Russel Winder
 
+import os.path
+
 Import('environment')
 
 sources = \
@@ -29,6 +31,10 @@ sources = \
         Glob('platform/' + environment['PLATFORM'] + '/*.[cS]')
 
 for item in environment['driverList'] :
+    path = 'drivers/' + item
+    if not os.path.isdir(path):
+        feature , device = item.split ( '/' )
+        raise ValueError, 'Driver ' + device + ' for ' + feature + ' not available.'
     sources += Glob('drivers/' + item + '/*.[cS]')
 
 objects = environment.Object(sources)