merge revision(s) e1a4e44f14482814a0540ae0a4b31d858ff56f53:

	Extract gemspec files to each gem directories

	Since extension libraries can not be built in the source directory,
	rubygems warns gems have extension libraries as the extensions are not
	built.  To order to suppress this warnings, extract such gemspec files
	under each gem directories instead of the common `specifications`
	directory.
	---
	 tool/gem-unpack.rb | 10 ++++++----
	 1 file changed, 6 insertions(+), 4 deletions(-)

1 files changed, 6 insertions, 4 deletions

diff --git a/tool/gem-unpack.rb b/tool/gem-unpack.rb
index fe10b0e420..16ee89f62d 100644
--- a/tool/gem-unpack.rb
+++ b/tool/gem-unpack.rb
@@ -11,10 +11,12 @@ def Gem.unpack(file, dir = nil, spec_dir = nil)
   target = spec.full_name
   target = File.join(dir, target) if dir
   pkg.extract_files target
-  FileUtils.mkdir_p(spec_dir ||= target)
-  spec_file = File.join(spec_dir, "#{spec.name}-#{spec.version}.gemspec")
-  open(spec_file, 'wb') do |f|
-    f.print spec.to_ruby
+  if spec.extensions.empty?
+    spec_dir ||= target
+  else
+    spec_dir = target
   end
+  FileUtils.mkdir_p(spec_dir)
+  File.binwrite(File.join(spec_dir, "#{spec.name}-#{spec.version}.gemspec"), spec.to_ruby)
   puts "Unpacked #{file}"
 end