Another Compile Error

Hi guys, I am trying to get openBSC to compile on Ubuntu 2.6.31 but I get the following error when I run make: Making all in src make[2]: Entering directory `/home/stuart/openbsc/openbsc/src' CCLD bsc_hack libmsc.a(gsm_04_08.o): In function `mm_rx_id_resp': /home/stuart/openbsc/openbsc/src/gsm_04_08.c:259: undefined reference to `gsm48_mi_to_string' libmsc.a(gsm_04_08.o): In function `mm_rx_loc_upd_req': /home/stuart/openbsc/openbsc/src/gsm_04_08.c:345: undefined reference to `gsm48_mi_to_string' libmsc.a(gsm_04_08.o): In function `gsm48_rx_mm_imsi_detach_ind': /home/stuart/openbsc/openbsc/src/gsm_04_08.c:685: undefined reference to `gsm48_mi_to_string' libmsc.a(gsm_04_08.o): In function `gsm48_rx_mm_serv_req': /home/stuart/openbsc/openbsc/src/gsm_04_08.c:642: undefined reference to `gsm48_mi_to_string' libbsc.a(gsm_04_08_utils.o): In function `gsm48_paging_extract_mi': /home/stuart/openbsc/openbsc/src/gsm_04_08_utils.c:262: undefined reference to `gsm48_mi_to_string' collect2: ld returned 1 exit status make[2]: *** [bsc_hack] Error 1 make[2]: Leaving directory `/home/stuart/openbsc/openbsc/src' make[1]: *** [all-recursive] Error 1 make[1]: Leaving directory `/home/stuart/openbsc/openbsc' make: *** [all] Error 2 Any ideas? Thanks, Stuart