Could I get the source code of cudart, do some change and rebuild it?

Is there any approach that I could get the source code of cudart, do some change and rebuild it?

the source code for CUDART (the cuda runtime library) is not published

@makailove123 If there are missing features or bugs in the CUDA runtime (CUDART) it would be helpful to post details and to submit a feature request through the bug tracking system.