nobu	2014-12-30 15:13:33 +0900 (Tue, 30 Dec 2014)

  New Revision: 49070

  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=49070

  Log:
    fiddle: append libffi config.log
    
    * ext/fiddle/extconf.rb: copy config.log of libffi when failed.

  Modified files:
    trunk/ext/fiddle/extconf.rb
Index: ext/fiddle/extconf.rb
===================================================================
--- ext/fiddle/extconf.rb	(revision 49069)
+++ ext/fiddle/extconf.rb	(revision 49070)
@@ -78,8 +78,14 @@ begin https://github.com/ruby/ruby/blob/trunk/ext/fiddle/extconf.rb#L78
   FileUtils.rm_f("#{libffi.include}/ffitarget.h")
   Logging::open do
     Logging.message("%p in %p\n", args, opts)
-    system(*args, **opts) or
+    unless system(*args, **opts)
+      begin
+        IO.copy_stream(libffi.dir + "/config.log", Logging.instance_variable_get(:@logfile))
+      rescue SystemCallError => e
+        Logfile.message("%s\n", e.message)
+      end
       raise "failed to configure libffi. Please install libffi."
+    end
   end
   if $mswin && File.file?("#{libffi.include}/ffitarget.h")
     FileUtils.rm_f("#{libffi.include}/ffitarget.h")

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