From bf5a825317fc16edc0cac853e8e2e00bb46bc838 Mon Sep 17 00:00:00 2001
From: Thomas Nagy <tnagy@waf.io>
Date: Fri, 29 Jan 2021 23:46:05 +0100
Subject: [PATCH] Work around faulty vcvarsall.bat scripts #2315

---
 waflib/Tools/msvc.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/waflib/Tools/msvc.py b/waflib/Tools/msvc.py
index bf7abf01..e3e6da41 100644
--- a/waflib/Tools/msvc.py
+++ b/waflib/Tools/msvc.py
@@ -187,7 +187,7 @@ echo PATH=%%PATH%%
 echo INCLUDE=%%INCLUDE%%
 echo LIB=%%LIB%%;%%LIBPATH%%
 """ % (vcvars,target))
-	sout = conf.cmd_and_log(['cmd.exe', '/E:on', '/V:on', '/C', batfile.abspath()])
+	sout = conf.cmd_and_log(['cmd.exe', '/E:on', '/V:on', '/C', batfile.abspath()], stdin=getattr(Utils.subprocess, 'DEVNULL', None))
 	lines = sout.splitlines()
 
 	if not lines[0]: