Dolphin Git 3.5-134 is compiled. This is the trunk of Dolphin Project. Dolphin is the first Gamecube emulator able to run commercial games! Dolphin is a Gamecube, Wii and Triforce (the arcade machine based on the Gamecube) emulator which supports many extra features and abilities not present on the original consoles. It has a partial Wii support and plays most Gamecube games.

Dolphin Git changelog:
* Added GC Steering Wheel emulation.

To set it up, change the Port 1 controller to "Steering Wheel" under the GameCube tab. This will tell the game that you have a force feedback steering wheel connected.
In the Gamecube Pad Settings, change the Rumble Motor to "Constant".
Configure the controls:

Main Stick Left/Right = Steer Left/Right
Main Stick Up = Accelerate
Main Stick Down = Brake

Thanks to ulao for the device communications info.

Download: Dolphin Git 3.5-134 x86
Download: Dolphin Git 3.5-134 x64
Source: Here