Hello Barry: Your previous e-mails suggest that you installed GNU Radio by using the apt command. Are you using the official Ubuntu respository (which is GNU Radio 3.7)? Or, are you using some kind third-party packages (maybe 3.8)? If you are using the official Ubuntu packages (for GNU Radio), then you can just install gr-osmosdr from there too (sudo apt install gr-osmosdr). If you still want to build gr-osmosdr (if you need to install a modified or an updated version of gr-osmosdr), then get gr-osmosdr for GNU Radio 3.7 (I think you are using one for the GNU Radio 3.6, which is too old), and install missing dependencies as mentioned in the error message (like doxygen, libhackrf-dev, etc). If you absolutely need to run gr-osmosdr for GNU Radio 3.6 (don't do this unless you need to run a heavily modified version of gr-osmosdr that only supports gr3.6), then you will need to install GNU Radio 3.6, which would be pretty annoying on modern Linux distros. If you did not use the official Ubuntu repo to install GNU Radio and used a third-party repo instead, then check if they have their own versions of gr-osmosdr. If they don't, install gnuradio-dev (from their repo) and try building gr-osmosdr for that. If it's GNU Radio v3.8 or higher, then you need to get a version of gr-osmosdr that supports gr 3.8. Again, you will need to install some additional dependencies as mentioned in the message. Regards, Kyeong Su Shin ------------------------------ *보낸 사람:* barry allen &lt;savitaristic(a)gmail.com&gt; 대신 osmocom-sdr < osmocom-sdr-bounces(a)lists.osmocom.org&gt; *보낸 날짜:* 2020년 1월 21일 화요일 오후 6:04 *받는 사람:* osmocom-sdr(a)lists.osmocom.org &lt;osmocom-sdr(a)lists.osmocom.org&gt; *제목:* i can't builld the gr-osmosdr I can not compile the block gr-osmosdr, obtained block of errors ,if you can help me solve the problem ,please.Sincerely thebugslayers The following are the errors -- The CXX compiler identification is GNU 7.4.0 -- The C compiler identification is GNU 7.4.0 -- Check for working CXX compiler: /usr/bin/c++ -- Check for working CXX compiler: /usr/bin/c++ -- works -- Detecting CXX compiler ABI info -- Detecting CXX compiler ABI info - done -- Detecting CXX compile features -- Detecting CXX compile features - done -- Check for working C compiler: /usr/bin/cc -- Check for working C compiler: /usr/bin/cc -- works -- Detecting C compiler ABI info -- Detecting C compiler ABI info - done -- Detecting C compile features -- Detecting C compile features - done -- Build type not specified: defaulting to release. -- Found Git: /usr/bin/git (found version "2.17.1") -- Extracting version information from git describe... -- Configuring Boost C++ Libraries... -- Looking for pthread.h -- Looking for pthread.h - found -- Looking for pthread_create -- Looking for pthread_create - not found -- Looking for pthread_create in pthreads -- Looking for pthread_create in pthreads - not found -- Looking for pthread_create in pthread -- Looking for pthread_create in pthread - found -- Found Threads: TRUE -- Boost version: 1.65.1 -- Found the following Boost libraries: -- thread -- system -- chrono -- date_time -- atomic -- Found PkgConfig: /usr/bin/pkg-config (found version "0.29.1") -- Checking for module 'gruel' -- No package 'gruel' found -- Could NOT find GRUEL (missing: GRUEL_LIBRARIES GRUEL_INCLUDE_DIRS) -- Checking for module 'gnuradio-core' -- No package 'gnuradio-core' found -- Could NOT find GNURADIO_CORE (missing: GNURADIO_CORE_LIBRARIES GNURADIO_CORE_INCLUDE_DIRS) -- Checking for module 'gnuradio-iqbalance' -- Found gnuradio-iqbalance, version 0 -- Could NOT find GNURADIO_IQBALANCE (missing: GNURADIO_IQBALANCE_INCLUDE_DIRS) -- Checking for module 'uhd' -- No package 'uhd' found -- Could NOT find UHD (missing: UHD_LIBRARIES UHD_INCLUDE_DIRS) -- Checking for module 'gnuradio-uhd' -- Found gnuradio-uhd, version 3.9.0 -- gnuradio-uhd not found. -- Could NOT find GNURADIO_UHD (missing: GNURADIO_UHD_INCLUDE_DIRS) -- Checking for module 'gnuradio-fcd' -- No package 'gnuradio-fcd' found -- gnuradio-fcd not found. -- Could NOT find GNURADIO_FCD (missing: GNURADIO_FCD_LIBRARIES GNURADIO_FCD_INCLUDE_DIRS) -- Checking for module 'gnuradio-fcdproplus' -- Found gnuradio-fcdproplus, version 3.7.11 -- Found gnuradio-fcdproplus: /usr/include, /usr/lib/x86_64-linux-gnu/libgnuradio-fcdproplus.so -- Found GNURADIO_FCDPP: /usr/lib/x86_64-linux-gnu/libgnuradio-fcdproplus.so -- Checking for module 'libosmosdr' -- No package 'libosmosdr' found -- libosmosdr not found. -- Checking for module 'librtlsdr' -- No package 'librtlsdr' found -- librtlsdr not found. -- Checking for module 'libmirisdr' -- No package 'libmirisdr' found -- libmirisdr not found. -- Checking for module 'libhackrf' -- Found libhackrf, version 0.5 -- Found LIBHACKRF: /usr/local/lib/libhackrf.so -- Checking for module 'libairspy' -- No package 'libairspy' found -- Could NOT find LIBAIRSPY (missing: LIBAIRSPY_LIBRARIES LIBAIRSPY_INCLUDE_DIRS) -- Checking for module 'libbladeRF' -- No package 'libbladeRF' found -- libbladeRF not found. -- Could NOT find Doxygen (missing: DOXYGEN_EXECUTABLE) CMake Error at CMakeLists.txt:166 (message): Gruel required to build gr-osmosdr -- Configuring incomplete, errors occurred! See also "/home/shan/gr-osmosdr/build/CMakeFiles/CMakeOutput.log". See also "/home/shan/gr-osmosdr/build/CMakeFiles/CMakeError.log". Thanks:)