[ gpsdrive ] Mapnik

Hi,

I'm a newbie here & can't get the archives to download, so sorry if this 
is an FAQ, but:

map_handler.o: In function `loadmap':
/home/mark/geo/gpsdrive-2.10pre4/src/map_handler.c:664: undefined 
reference to `get_mapnik_imagedata'
collect2: ld returned 1 exit status

I know I can turn off the option to use this; I particularly don't wish 
to do so.

I'm obviously missing something, but I can't see quite what. It compiled 
mapnik.cpp quite happily, which contains said function.

Anyone know what else I need here?

Thanks..
Mark