* lib/mkmf.rb (MakeMakefile#configuration): DESTDIR should never affect

top_srcdir and builddir.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@50355 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,8 @@
+Mon Apr 20 16:49:52 2015  NAKAMURA Usaku  <usa@ruby-lang.org>
+
+	* lib/mkmf.rb (MakeMakefile#configuration): DESTDIR should never affect
+	  top_srcdir and builddir.
+
 Mon Apr 20 16:18:17 2015  NAKAMURA Usaku  <usa@ruby-lang.org>
 
 	* common.mk ($(arch)-fake.rb): fix the path separator up for Windows.

lib/mkmf.rb

@@ -1915,7 +1915,7 @@ VPATH = #{vpath.join(CONFIG['PATH_SEPARATOR'])}
       next if /^abs_/ =~ key
       next if /^(?:src|top|hdr)dir$/ =~ key
       next unless /dir$/ =~ key
-      mk << "#{key} = #{with_destdir(var)}\n"
+      mk << "#{key} = #{/^(?:top_src|build)dir$/ =~ key ? var : with_destdir(var)}\n"
     end
     if !$extmk and !$configure_args.has_key?('--ruby') and
         sep = config_string('BUILD_FILE_SEPARATOR')