[ 28%] Building CXX object src/device/CMakeFiles/obj_device.dir/device_ledger.cpp.o
/home/marco/ryo-new/ryo-currency/src/device/device_ledger.cpp: In function ‘void hw::ledger::register_all(std::map<std::__cxx11::basic_string<char>, std::unique_ptr<hw::device> >&)’:
/home/marco/ryo-new/ryo-currency/src/device/device_ledger.cpp:2122:37: error: invalid new-expression of abstract class type ‘hw::ledger::device_ledger’
   legder_device = new device_ledger();
                                     ^
In file included from /home/marco/ryo-new/ryo-currency/src/device/device_ledger.cpp:46:0:
/home/marco/ryo-new/ryo-currency/src/device/device_ledger.hpp:110:7: note:   because the following virtual functions are pure within ‘hw::ledger::device_ledger’:
 class device_ledger : public hw::device
       ^
In file included from /home/marco/ryo-new/ryo-currency/src/device/device_ledger.hpp:48:0,
                 from /home/marco/ryo-new/ryo-currency/src/device/device_ledger.cpp:46:
/home/marco/ryo-new/ryo-currency/src/device/device.hpp:160:29: note: 	virtual crypto::secret_key hw::device::generate_legacy_keys(crypto::public_key&, crypto::secret_key&, const secret_key&, bool)
  virtual crypto::secret_key generate_legacy_keys(crypto::public_key &pub, crypto::secret_key &sec, const crypto::secret_key
                             ^
src/device/CMakeFiles/obj_device.dir/build.make:134: recipe for target 'src/device/CMakeFiles/obj_device.dir/device_ledger.cpp.o' failed
make[3]: *** [src/device/CMakeFiles/obj_device.dir/device_ledger.cpp.o] Error 1
make[3]: Leaving directory '/home/marco/ryo-new/ryo-currency/build/release'
CMakeFiles/Makefile2:3273: recipe for target 'src/device/CMakeFiles/obj_device.dir/all' failed
make[2]: *** [src/device/CMakeFiles/obj_device.dir/all] Error 2
make[2]: Leaving directory '/home/marco/ryo-new/ryo-currency/build/release'
Makefile:138: recipe for target 'all' failed
make[1]: *** [all] Error 2
make[1]: Leaving directory '/home/marco/ryo-new/ryo-currency/build/release'
Makefile:64: recipe for target 'release-all' failed
make: *** [release-all] Error 2