From: Ralph Shnelvar Date: 2010-01-25T10:25:53+09:00 Subject: Re: Ruby c extensions on windows Friday, January 22, 2010, 4:25:08 PM, you wrote: LL> Again, help us help you. Like Nilbert Nullingsworth, I am going to want to build a C extension. I am running Instant Rails. f:\Ralph-Rails-Apps>ruby -v ruby 1.8.6 (2007-09-24 patchlevel 111) [i386-mswin32] f:\Ralph-Rails-Apps>rails -v Rails 2.3.5 f:\Ralph-Rails-Apps>gem -v 1.3.5 How can I tell what the underlying compiler to Ruby is/was since I want to have extensions that will run in this environment? Can Instant rails use Ruby 1.9? Is there a step-by-step written anywhere about how to write an extension in the Windows environment?