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* ext/fiddle/extconf.rb: check for windows.h while building fiddle.
Thanks Jon Forums! [ruby-core:33923]
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* Use _WIN32 rather than checking for windows.h. Thanks Jon Forums!
[ruby-core:33977]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_2@30559 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* test/fiddle/*: testing fiddle extension
* ext/dl/lib/dl.rb: Requiring fiddle if it is available
* ext/dl/lib/dl/callback.rb: using Fiddle if it is available
* ext/dl/lib/dl/func.rb: ditto
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@27640 b2dd03c8-39d4-4d8f-98ff-823fe69b080e