checking for usleep... (cached) yes checking for gettimeofday... (cached) yes checking for Sleep... no checking whether mkdir accepts only one arg... no checking for xmlto... no checking for pkg-config... /usr/bin/pkg-config checking pkg-config is at least version 0.18... yes checking for GNURADIO_CORE... yes checking for GRUEL... yes checking for LIBOSMOCORE... configure: error: Package requirements (libosmocore >= 0.3.1) were not met: No package 'libosmocore' found Consider adjusting the PKG_CONFIG_PATH environment variable if you installed software in a non-standard prefix. Alternatively, you may set the environment variables LIBOSMOCORE_CFLAGS and LIBOSMOCORE_LIBS to avoid the need to call pkg-config. See the pkg-config man page for more details. root@kali:~/libosmocore/airprobe/gsm-receiver# make make: *** No targets specified and no makefile found. Stop. root@kali:~/libosmocore/airprobe/gsm-receiver#