It is good to get problem reports - in this case it sounds like it could be a duplicate of this http://lists.gnu.org/archive/html/discuss-gnuradio/2014-01/msg00057.html and it sounds perhaps like they haven't fixed it yet. See also msg00073.html in the same mail archive What versions of the libusb stuff do you have installed? Try this dpkg-query -l | grep -i libusb Max On Monday, February 10, 2014 2:17 PM, Brett Friermood < brett.friermood(a)gmail.com&gt; wrote: Hello all. In an attempt to finally start playing with OP25 I tried to install it over the weekend. Following the simple instructions on the wiki I cloned pybombs and ran it to install gr-op25, accepting the defaults in the process. Below are the last few lines of output containing many errors related to the UHD driver. Is this just the result of the source being out of whack at the time it was downloaded? Or did I miss something on my end? I had previously tried it a couple days before and got similar errors. For reference I'm a somewhat advanced Linux user, but git and the pybombs concept are new to me. Thanks, Brett KQ9N [ 64%] Building CXX object lib/CMakeFiles/uhd.dir/usrp/b100/b100_impl.cpp.o [ 64%] Building CXX object lib/CMakeFiles/uhd.dir/usrp/b100/clock_ctrl.cpp.o [ 65%] Building CXX object lib/CMakeFiles/uhd.dir/usrp/b100/codec_ctrl.cpp.o [ 65%] Building CXX object lib/CMakeFiles/uhd.dir/usrp/b100/dboard_iface.cpp.o [ 66%] Building CXX object lib/CMakeFiles/uhd.dir/usrp/b100/io_impl.cpp.o [ 66%] Building CXX object lib/CMakeFiles/uhd.dir/usrp/b100/usb_zero_copy_wrapper.cpp.o [ 67%] Building CXX object lib/CMakeFiles/uhd.dir/usrp/b200/b200_impl.cpp.o /home/brett/pybombs/src/uhd/host/lib/usrp/b200/b200_impl.cpp: In constructor 'b200_impl::b200_impl(const uhd::device_addr_t&)': /home/brett/pybombs/src/uhd/host/lib/usrp/b200/b200_impl.cpp:162: warning: format '%x' expects type 'unsigned int*', but argument 3 has type 'uint16_t*' /home/brett/pybombs/src/uhd/host/lib/usrp/b200/b200_impl.cpp:164: warning: format '%x' expects type 'unsigned int*', but argument 3 has type 'uint16_t*' [ 67%] Building CXX object lib/CMakeFiles/uhd.dir/usrp/b200/b200_iface.cpp.o /home/brett/pybombs/src/uhd/host/lib/usrp/b200/b200_iface.cpp: In member function 'virtual void b200_iface_impl::write_eeprom(uint16_t, uint16_t, const uhd::byte_vector_t&)': /home/brett/pybombs/src/uhd/host/lib/usrp/b200/b200_iface.cpp:243: error: 'libusb_error_name' was not declared in this scope /home/brett/pybombs/src/uhd/host/lib/usrp/b200/b200_iface.cpp: In member function 'virtual uhd::byte_vector_t b200_iface_impl::read_eeprom(uint16_t, uint16_t, size_t)': /home/brett/pybombs/src/uhd/host/lib/usrp/b200/b200_iface.cpp:259: error: 'libusb_error_name' was not declared in this scope /home/brett/pybombs/src/uhd/host/lib/usrp/b200/b200_iface.cpp: In member function 'virtual void b200_iface_impl::transact_spi(unsigned char*, size_t, unsigned char*, size_t)': /home/brett/pybombs/src/uhd/host/lib/usrp/b200/b200_iface.cpp:283: error: 'libusb_error_name' was not declared in this scope /home/brett/pybombs/src/uhd/host/lib/usrp/b200/b200_iface.cpp:295: error: 'libusb_error_name' was not declared in this scope /home/brett/pybombs/src/uhd/host/lib/usrp/b200/b200_iface.cpp: In member function 'virtual void b200_iface_impl::ad9361_transact(const unsigned char*, unsigned char*)': /home/brett/pybombs/src/uhd/host/lib/usrp/b200/b200_iface.cpp:308: error: 'libusb_error_name' was not declared in this scope /home/brett/pybombs/src/uhd/host/lib/usrp/b200/b200_iface.cpp:316: error: 'libusb_error_name' was not declared in this scope /home/brett/pybombs/src/uhd/host/lib/usrp/b200/b200_iface.cpp: In member function 'virtual void b200_iface_impl::reset_fx3()': /home/brett/pybombs/src/uhd/host/lib/usrp/b200/b200_iface.cpp:439: error: 'libusb_error_name' was not declared in this scope /home/brett/pybombs/src/uhd/host/lib/usrp/b200/b200_iface.cpp: In member function 'virtual void b200_iface_impl::reset_gpif()': /home/brett/pybombs/src/uhd/host/lib/usrp/b200/b200_iface.cpp:451: error: 'libusb_error_name' was not declared in this scope /home/brett/pybombs/src/uhd/host/lib/usrp/b200/b200_iface.cpp: In member function 'virtual uint8_t b200_iface_impl::get_usb_speed()': /home/brett/pybombs/src/uhd/host/lib/usrp/b200/b200_iface.cpp:483: error: 'libusb_error_name' was not declared in this scope /home/brett/pybombs/src/uhd/host/lib/usrp/b200/b200_iface.cpp: In member function 'virtual uint8_t b200_iface_impl::get_fx3_status()': /home/brett/pybombs/src/uhd/host/lib/usrp/b200/b200_iface.cpp:498: error: 'libusb_error_name' was not declared in this scope /home/brett/pybombs/src/uhd/host/lib/usrp/b200/b200_iface.cpp: In member function 'virtual uint16_t b200_iface_impl::get_compat_num()': /home/brett/pybombs/src/uhd/host/lib/usrp/b200/b200_iface.cpp:513: error: 'libusb_error_name' was not declared in this scope /home/brett/pybombs/src/uhd/host/lib/usrp/b200/b200_iface.cpp: In member function 'void b200_iface_impl::usrp_get_firmware_hash(hash_type&)': /home/brett/pybombs/src/uhd/host/lib/usrp/b200/b200_iface.cpp:527: error: 'libusb_error_name' was not declared in this scope /home/brett/pybombs/src/uhd/host/lib/usrp/b200/b200_iface.cpp: In member function 'void b200_iface_impl::usrp_set_firmware_hash(hash_type)': /home/brett/pybombs/src/uhd/host/lib/usrp/b200/b200_iface.cpp:539: error: 'libusb_error_name' was not declared in this scope /home/brett/pybombs/src/uhd/host/lib/usrp/b200/b200_iface.cpp: In member function 'void b200_iface_impl::usrp_get_fpga_hash(hash_type&)': /home/brett/pybombs/src/uhd/host/lib/usrp/b200/b200_iface.cpp:551: error: 'libusb_error_name' was not declared in this scope /home/brett/pybombs/src/uhd/host/lib/usrp/b200/b200_iface.cpp: In member function 'void b200_iface_impl::usrp_set_fpga_hash(hash_type)': /home/brett/pybombs/src/uhd/host/lib/usrp/b200/b200_iface.cpp:563: error: 'libusb_error_name' was not declared in this scope /home/brett/pybombs/src/uhd/host/lib/usrp/b200/b200_iface.cpp: In member function 'virtual uint32_t b200_iface_impl::load_fpga(std::string)': /home/brett/pybombs/src/uhd/host/lib/usrp/b200/b200_iface.cpp:598: error: 'libusb_error_name' was not declared in this scope /home/brett/pybombs/src/uhd/host/lib/usrp/b200/b200_iface.cpp:623: error: 'libusb_error_name' was not declared in this scope /home/brett/pybombs/src/uhd/host/lib/usrp/b200/b200_iface.cpp:646: error: 'libusb_error_name' was not declared in this scope /home/brett/pybombs/src/uhd/host/lib/usrp/b200/b200_iface.cpp:675: error: 'libusb_error_name' was not declared in this scope /home/brett/gnuradio/include/boost/system/error_code.hpp: At global scope: /home/brett/gnuradio/include/boost/system/error_code.hpp:214: warning: 'boost::system::posix_category' defined but not used /home/brett/gnuradio/include/boost/system/error_code.hpp:215: warning: 'boost::system::errno_ecat' defined but not used /home/brett/gnuradio/include/boost/system/error_code.hpp:216: warning: 'boost::system::native_ecat' defined but not used make[2]: *** [lib/CMakeFiles/uhd.dir/usrp/b200/b200_iface.cpp.o] Error 1 make[2]: *** Waiting for unfinished jobs.... make[1]: *** [lib/CMakeFiles/uhd.dir/all] Error 2 make: *** [all] Error 2 ERROR:root:PyBOMBS Make step failed for package (uhd) please see bash output above for a reason (hint: look for the word Error)

afaik the symbol that you reported as unresolved wasn't added until libusb 1.0.9 - 1.0.8 may not do it. In any case you'll need to excise the older version of libusb - both include and lib otherwise the compile process might try to use that instead of the newer one you've installed...