[Patch] BaseTools: Enhance error handling for unsupported toolchain flags

[Yonghong Zhu <yonghong.zhu@intel.com>]

fixes: https://bugzilla.tianocore.org/show_bug.cgi?id=595
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Yonghong Zhu <yonghong.zhu@intel.com>
---
 BaseTools/Source/Python/AutoGen/GenMake.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/BaseTools/Source/Python/AutoGen/GenMake.py b/BaseTools/Source/Python/AutoGen/GenMake.py
index 7d3374a..88edbe6 100644
--- a/BaseTools/Source/Python/AutoGen/GenMake.py
+++ b/BaseTools/Source/Python/AutoGen/GenMake.py
@@ -1,9 +1,9 @@
 ## @file
 # Create makefile for MS nmake and GNU make
 #
-# Copyright (c) 2007 - 2017, Intel Corporation. All rights reserved.<BR>
+# Copyright (c) 2007 - 2018, Intel Corporation. All rights reserved.<BR>
 # This program and the accompanying materials
 # are licensed and made available under the terms and conditions of the BSD License
 # which accompanies this distribution.  The full text of the license may be found at
 # http://opensource.org/licenses/bsd-license.php
 #
@@ -799,10 +799,12 @@ cleanlib:
                                     break
                         if Tool:
                             SingleCommandLength += len(self._AutoGenObject._BuildOption[Tool]['PATH'])
                             for item in SingleCommandList[1:]:
                                 if FlagDict[Tool]['Macro'] in item:
+                                    if 'FLAGS' not in self._AutoGenObject._BuildOption[Tool]:
+                                        EdkLogger.error("build", AUTOGEN_ERROR, "%s_FLAGS doesn't exist in %s ToolChain." %(Tool, self._AutoGenObject.ToolChain), ExtraData="[%s]" % str(self._AutoGenObject))
                                     Str = self._AutoGenObject._BuildOption[Tool]['FLAGS']
                                     for Option in self._AutoGenObject.BuildOption.keys():
                                         for Attr in self._AutoGenObject.BuildOption[Option]:
                                             if Str.find(Option + '_' + Attr) != -1:
                                                 Str = Str.replace('$(' + Option + '_' + Attr + ')', self._AutoGenObject.BuildOption[Option][Attr])
-- 
2.6.1.windows.1