/usr/bin/ld.bfd.real: ../common/pb/libcockatrice_protocol.a(admin_commands.pb.cc.o): undefined reference to symbol 'pthread_once@@GLIBC_2.2.5'
/lib/x86_64-linux-gnu/libpthread.so.0: error adding symbols: DSO missing from command line
collect2: error: ld returned 1 exit status
make[2]: *** [cockatrice/cockatrice] Error 1
make[1]: *** [cockatrice/CMakeFiles/cockatrice.dir/all] Error 2
make: *** [all] Error 2