nobu	2014-05-02 12:26:48 +0900 (Fri, 02 May 2014)

  New Revision: 45785

  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=rev&revision=45785

  Log:
    mkmf.rb: no messages unless needed
    
    * lib/mkmf.rb (create_makefile): no library scripts to install, no
      installing messages.

  Modified files:
    trunk/lib/mkmf.rb
Index: lib/mkmf.rb
===================================================================
--- lib/mkmf.rb	(revision 45784)
+++ lib/mkmf.rb	(revision 45785)
@@ -2310,7 +2310,11 @@ static: $(STATIC_LIB)#{$extout ? " insta https://github.com/ruby/ruby/blob/trunk/lib/mkmf.rb#L2310
         end
       end
       mfile.print "pre-install-rb#{sfx}:\n"
-      mfile.print("\t$(ECHO) installing#{sfx.sub(/^-/, " ")} #{target} libraries\n")
+      if files.empty?
+        mfile.print("\t@#{CONFIG['NULLCMD']}\n")
+      else
+        mfile.print("\t$(ECHO) installing#{sfx.sub(/^-/, " ")} #{target} libraries\n")
+      end
       if $extout
         dirs.uniq!
         unless dirs.empty?

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