https://git.ruby-lang.org/ruby.git/commit/?id=1f0762ad21

From 1f0762ad2194aef6457c6687e2e536bb695193bf Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@r...>
Date: Thu, 20 Jun 2019 19:27:27 +0900
Subject: Suppress messages from mkmf


diff --git a/test/mkmf/base.rb b/test/mkmf/base.rb
index 80dec14..cdcf14c 100644
--- a/test/mkmf/base.rb
+++ b/test/mkmf/base.rb
@@ -130,8 +130,10 @@ module TestMkmf::Base https://github.com/ruby/ruby/blob/trunk/test/mkmf/base.rb#L130
   def mkmf(*args, &block)
     @stdout.clear
     stdout, @stdout.origin, $stdout = @stdout.origin, $stdout, @stdout
+    verbose, $VERBOSE = $VERBOSE, false
     @mkmfobj.instance_eval(*args, &block)
   ensure
+    $VERBOSE = verbose
     $stdout, @stdout.origin = @stdout.origin, stdout
   end
 
-- 
cgit v0.10.2


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