libosmocore/osmocombb build error

Hi, When building osmocombb with an updated src/shared/libosmocore (0.3.6) the build fails due to make attempting to build utils/osmo-arfcn.c for build-target which does not have stdio. I have no patch as I was not sure what the preferred way to solve it is. Maybe a --disable-utils like for tests? Best regards, Job make[3]: Entering directory `osmocom-bb/src/shared/libosmocore/build-target/utils' CC osmo-arfcn.o ../../utils/osmo-arfcn.c: In function 'arfcn2freq': ../../utils/osmo-arfcn.c:43: warning: incompatible implicit declaration of built-in function 'fprintf' ../../utils/osmo-arfcn.c:43: error: 'stderr' undeclared (first use in this function)