* benchmark/driver.rb: define File::NULL if not defiend and /dev/null

is available to run benchmark driver on ruby 1.9.2.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@45832 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,8 @@
+Tue May  6 01:08:01 2014  Koichi Sasada  <ko1@atdot.net>
+
+	* benchmark/driver.rb: define File::NULL if not defiend and /dev/null
+	  is available to run benchmark driver on ruby 1.9.2.
+
 Mon May  5 23:53:24 2014  Tanaka Akira  <akr@fsij.org>
 
 	* ext/socket/mkconstants.rb: Add IP_TRANSPARENT.

benchmark/driver.rb

@@ -238,6 +238,12 @@ class BenchmarkDriver
     result
   end
 
+  unless defined?(File::NULL)
+    if File.exist?('/dev/null')
+      File::NULL = '/dev/null'
+    end
+  end
+
   def measure executable, file
     cmd = "#{executable} #{@ruby_arg} #{file}"