1 files changed, 4 insertions, 0 deletions
diff --git a/lib/mkmf.rb b/lib/mkmf.rb
index 03ff262d25..7653cc6a43 100644
--- a/lib/mkmf.rb
+++ b/lib/mkmf.rb
@@ -299,6 +299,10 @@ module MakeMakefile
       @log.sync = true
     end
 
+    def self::log_opened?
+      @log and not @log.closed?
+    end
+
     def self::open
       log_open
       $stderr.reopen(@log)