[Openstreetmap] Getting data from gpsd

[Glen Barnes]

>If you can get DBUS to run on your mac, I have a gpxlogger that you can
>start which will log whatever gpsd says.
>
>see here:
>
>http://www.navsys.org/cvs/logger
>
>and click on "Download tarball" to get the source.
>
>
>  
>
I've got my machine dual booting with linux which has bdus installed. I 
tried compiling the gpxlogger software on that partition but I got the 
following error:

undefined reference to function 'floor'.

Any ideas on how to fix this error?

Thanks,
Glen