Problems linking RTAI and Linux Kernel 2.6 device drivers

Malte Witt malte.witt at
Tue Aug 21 08:57:48 CEST 2007


> insmod: error inserting 'hello.ko': -1 Unknown symbol in module
> and from dmesg:
> hello: Unknown symbol cos

You should build RTAI with math support and insert kernel module 
"rtai_math.ko" first in order to do in-kernel floating point math.


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