[Click] how to use c functions in linux kernel mode

[Eddie Kohler]

Hi Peng,

Unfortunately many C library functions are not available in the kernel.  YOu 
don't have access to files, and *floating point arithmetic is not allowed*.  Our 
kernel elements use fixed-point arithmetic (for example, our RED uses 
fixed-point arithmetic), and export information via handlers or LLRPCs rather 
than files.

Eddie


pwangee at udel.edu wrote:
> Hi, 
> 
> I used some c functions in my element such as pow, log, puts. When I try to make
> the click work as the kernel module, it gives some errors.
> 
> % /usr/local/sbin/click-install wp-wire-dem.click
> /usr/local/lib/click.o: unresolved symbol pow
> /usr/local/lib/click.o: unresolved symbol log
> /usr/local/lib/click.o: unresolved symbol puts
> /usr/local/lib/click.o: unresolved symbol printf
> click-install: ‘/sbin/insmod /usr/local/lib/click.o’ failed
> 
> Can I use the c functions in the kernel program? If can, how to use it? Thanks
> 
> Peng
> 
> 
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