Hi All, I have easily and smoothly installed GnuRadio 3.7.2.1 on Raspberry Pi with this procedure: 1. Add the following entry to the /etc/apt/sources.list file: deb http://mirrordirector.raspbian.org/raspbian/ jessie main contrib non-free rpi (reboot after modification) 2. sudo apt-get update 3. sudo apt-get install gnuradio Installation completed in about 1 hour and GnuRadio together with GnuRadio Companion Works on my RPi. However, when it comes to build Gr-Osmosdr trouble starts. I couldn't pass the CMAKE stage of Gr-Osmosdr build process. I remembered and applied the classical "export PATH, PYTHOPATH, LD_LIBRARY_PATH, PKG_CONFIG_PATH correction" and added necessary lines at the end of ./.bashrc . My install directory was /usr (without /local) !?? anyway I've added /usr/bin, /usr/lib ..etc. to appropriate places but this couldn't be a solution. Cmake couldn't find GnuradioConfig.cmake file, I found this file of the same version on my other computer running without problem and copied the missed file into correct directory on Rpi. This couldn't be the solution either. Then, Cmake couldn't locate gnuradio-runtime.pc file, similarly I copied gnuradio-runtime.pc of same version from another computer to RPi but this couldn't be a solution either. Now I get the same error message of this : http://gnuradio.org/redmine/issues/591 (Unable to compile out of tree projects due to wrong FindGnuradio.cmake) I am really tired. I have enough experience on installing - uninstalling Gnuradio building from the source, I have made this install uninstall building process several times but I am first time trying installation of a built gnuradio. Is there a way of recovering the existing install and continue building out of tree projects ? I appreciate your help, Kind regards 73 Murat TA1DB