From a5d7b5486b99f909ed0b598fb2d697e4724e14d5 Mon Sep 17 00:00:00 2001
From: cournape <cournape@fdb21ef1-2011-0410-befe-b5e4ea1792b1>
Date: Thu, 19 Nov 2009 04:55:31 +0000
Subject: [PATCH] ENH: add a wrapper around msvc_setup_env to guarantee the
 function is called only once.

git-svn-id: http://scons.tigris.org/svn/scons/trunk@4439 fdb21ef1-2011-0410-befe-b5e4ea1792b1
---
 src/engine/SCons/Tool/MSCommon/vc.py | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/engine/SCons/Tool/MSCommon/vc.py b/src/engine/SCons/Tool/MSCommon/vc.py
index c5f59361..8d5dba85 100644
--- a/src/engine/SCons/Tool/MSCommon/vc.py
+++ b/src/engine/SCons/Tool/MSCommon/vc.py
@@ -314,6 +314,16 @@ def get_host_target(env):
 
     return host_platform, target_platform
 
+def msvc_setup_env_once(env):
+    try:
+        has_run  = env["MSVC_SETUP_RUN"]
+    except KeyError:
+        has_run = False
+
+    if not has_run:
+        msvc_setup_env(env)
+        env["MSVC_SETUP_RUN"] = False
+
 def msvc_setup_env(env):
     debug('msvc_setup_env()')
 
-- 
2.26.2