CANbus multiple compile errors. Help

Most of them say " undefined reference to 'canbus' "

this is where i kinda gave up, acording to the posts on the CAN-BUS sheild page at sparkfun, several people have got this working and did not mention having to do all this, so i must have done something wrong. hoping to find out what.

Too much handwaving; not enough code.

If you are getting undefined reference to canbus, and don't tell us where canbus is defined, or what type it is, we can't really help you, now can we?