From 42e149c9ad5297b2cb507bfe56318fcae432cf55 Mon Sep 17 00:00:00 2001
From: nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Sat, 11 Apr 2015 13:49:02 +0000
Subject: mkmf.rb: fix VC failures

* lib/mkmf.rb (xsystem): assume all warnings go to stderr but not
  stdout.  cl.exe always prints input file names.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@50233 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 lib/mkmf.rb | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

(limited to 'lib')

diff --git a/lib/mkmf.rb b/lib/mkmf.rb
index 86fc49155a..044d72777a 100644
--- a/lib/mkmf.rb
+++ b/lib/mkmf.rb
@@ -387,8 +387,9 @@ module MakeMakefile
       if opts and opts[:werror]
         result = nil
         Logging.postpone do |log|
-          result = (system(libpath_env, command) and File.zero?(log.path))
-          ""
+          output = IO.popen(libpath_env, command, &:read)
+          result = ($?.success? and File.zero?(log.path))
+          output
         end
         result
       else
-- 
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