[LAD] hdspm.c compile error

hello, i recently purchased a madiface with express card. trying to compile a debian-source kernel 2.6.26-4, with replaced hdspm.c and hdspm.h, following instructions on http://wiki.linuxproaudio.org/index.php/Driver:hdspm i get following compile error: ERROR: "__muldf3" [sound/pci/rme9652/snd-hdspm.ko] undefined! ERROR: "__divdf3" [sound/pci/rme9652/snd-hdspm.ko] undefined! ERROR: "__fixdfsi" [sound/pci/rme9652/snd-hdspm.ko] undefined! ERROR: "__adddf3" [sound/pci/rme9652/snd-hdspm.ko] undefined! ERROR: "__floatsidf" [sound/pci/rme9652/snd-hdspm.ko] undefined! i tried to get more info on the net about this errors but did not find usefull hints. any help would be appreciated! peter