diff --git a/ChangeLog b/ChangeLog
index 319302b0f0..6cfd40df29 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,4 +1,7 @@
-Tue Jun 12 14:44:38 2007  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+Tue Jun 12 14:53:51 2007  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* lib/mkmf.rb (Logging.quiet, Logging.message): added quiet flag and
+	  use it.  [ruby-core:10909]
 
 	* lib/mkmf.rb (find_header): use header names in the message.
 
diff --git a/lib/mkmf.rb b/lib/mkmf.rb
index fa1339625c..e8b72b4ce2 100644
--- a/lib/mkmf.rb
+++ b/lib/mkmf.rb
@@ -181,6 +181,7 @@ module Logging
   @orgerr = $stderr.dup
   @orgout = $stdout.dup
   @postpone = 0
+  @quiet = $extmk
 
   def self::open
     @log ||= File::open(@logfile, 'w')
@@ -224,6 +225,10 @@ module Logging
       end
     end
   end
+
+  class << self
+    attr_accessor :quiet
+  end
 end
 
 def xsystem command
@@ -550,7 +555,7 @@ def append_library(libs, lib)
 end
 
 def message(*s)
-  unless $extmk and not $VERBOSE
+  unless Logging.quiet and not $VERBOSE
     printf(*s)
     $stdout.flush
   end