Error compiling openbsc

Hello guys, I installed a newly fresh Debian Lenny, downloaded openbsc project using git. But when running ./configure after autoreconf -i (which went well), I get the following message: ./configure: line 3551: syntax error near unexpected token `LIBOSMOCORE,' ./configure: line 3551: `PKG_CHECK_MODULES(LIBOSMOCORE, libosmocore)' I know the osmocomBB project has a bit of the focus now and that some sources in openbsc are also used in osmocomBB, hence the libosmocore? But can someone helping me out to get the openbsc build? Thank you.