Error while building osmocomBB

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The problem with the missing shtool has gone after a new clone today from the sources.

But now i got an error compiling the sources:

...
comm/timer.c:190: warning: unused parameter ‘irq’
   AR     comm/libcomm.a
   LD     board/compal_e88/hello_world.compalram.elf
apps/hello_world/main.o: In function `console_rx_cb':
apps/hello_world/main.c:59: undefined reference to `msgb_free'
comm/libcomm.a(sercomm.o): In function `sercomm_alloc_msgb':
../../shared/libosmocore/include/osmocom/core/msgb.h:330: undefined reference to `msgb_alloc'
comm/libcomm.a(sercomm.o): In function `sercomm_drv_rx_char':
comm/sercomm.c:246: undefined reference to `msgb_free'
comm/libcomm.a(sercomm.o): In function `dispatch_rx_msg':
comm/sercomm.c:227: undefined reference to `msgb_free'
comm/libcomm.a(sercomm.o): In function `sercomm_drv_pull':
comm/sercomm.c:161: undefined reference to `msgb_dequeue'
comm/sercomm.c:188: undefined reference to `msgb_free'
comm/libcomm.a(sercomm.o): In function `sercomm_sendmsg':
comm/sercomm.c:125: undefined reference to `msgb_enqueue'
comm/libcomm.a(sercomm_cons.o): In function `msgb_alloc_headroom':
../../shared/libosmocore/include/osmocom/core/msgb.h:330: undefined reference to `msgb_alloc'
make[1]: *** [board/compal_e88/hello_world.compalram.elf] Fehler 1
make[1]: Leaving directory `/srv/osmocom-bb/src/target/firmware'
make: *** [firmware] Fehler 2


Regards