Initial Windows Support

[wagenet]

Current Status

• Ready to merge!

Pre-Merge To Do

• Get helix_runtime tests passing
• Automate helix_runtime.def generation
• Automate helix_runtime.lib generation
• Automate ruby .lib generation (or find alternative)
• Don't hardcode Ruby version
• Figure out appropriate ways to handle DLL paths to avoid duplication (See 1 2)
• Get tests passing for examples/console

Future To Do

• Look into DLL versioning? Does this actually matter?
• Examine whether its possible for us to automatically add to the Windows DLL lookup PATH with Bundler
• Improve extern handling: https://gcc.gnu.org/wiki/Visibility
• Figure out 64-bit support (WIP: Support 64-bit Windows #32)
• Automate building of helix-runtime.dll from libcruby-sys (or at least have a message)
• Move ruby_info.rb into libcruby-sys directory.
• Package helix-runtime.lib with libcruby-sys.

[wagenet]

@wycats @chancancode I believe this is ready enough to merge. Once merged, I can make new tickets with the other items or add them to the master ticket.

[chancancode]

Instead of checking the Ruby HelixRuntime::VERSION, you could just make the C-extension expose an additional real symbol 😛 At the end of the day that is what we are interfacing with, so checking the symbol will probably be more reliable (and easier) than checking a Ruby value.