comedi_calibrate configure failure

Hi all,

I've downloaded the comedi_calibrate from cvs but it fails in the  
configure phase. Actually I'm working with a rtai3.5 patched kernel  
and cvs comedi and comedilib. I need the comedi_calibrate tool  
because I'm working with a National Instrument 6143 that at the  
moment shows significant offsets on each channel.

This is a chunk of the output of the ./configure in the  
comedi_calibrate directory:

checking for string.h... yes
checking for memory.h... yes
checking for strings.h... yes
checking for inttypes.h... yes
checking for stdint.h... yes
checking for unistd.h... yes
checking comedilib.h usability... no
checking comedilib.h presence... no
checking for comedilib.h... no
configure: error: Failed to find comedilib.h.

and attached there's the log file.

Has anyone experienced something like that?
Thanks
Bye

Alessandro Toso