I am facing this error while during make of gr-lte(3.6.5.1) OS : Ubuntu 12.04 GNU Radio ver : 3.6.5.1 GCC : 4.6.3
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ make -j5 Scanning dependencies of target pygen_apps_9a6dd Scanning dependencies of target _lte_swig_swig_tag Scanning dependencies of target pygen_python_fd902 Scanning dependencies of target _lte_swig_doc_tag [ 0%] [ 4%] [ 4%] Built target pygen_apps_9a6dd Generating __init__.pyc, viterbi_vfvb.pyc, hier_freq_estimate_cc.pyc, hier_sss_sync_cc.pyc, hier_pss_sync_cc.pyc, decode_bch_vfvb.pyc, decode_pbch_vcvf.pyc, estimator_parameterizer_msg.pyc, utils.pyc, decode_pcfich_vcm.pyc [ 7%] Building CXX object swig/CMakeFiles/_lte_swig_swig_tag.dir/_lte_swig_swig_tag.cpp.o [ 9%] Generating __init__.pyo, viterbi_vfvb.pyo, hier_freq_estimate_cc.pyo, hier_sss_sync_cc.pyo, hier_pss_sync_cc.pyo, decode_bch_vfvb.pyo, decode_pbch_vcvf.pyo, estimator_parameterizer_msg.pyo, utils.pyo, decode_pcfich_vcm.pyo Building CXX object swig/CMakeFiles/_lte_swig_doc_tag.dir/_lte_swig_doc_tag.cpp.o [ 11%] Building CXX object lib/CMakeFiles/gnuradio-lte.dir/lte_qpsk_soft_demod_vcvf.cc.o Linking CXX executable _lte_swig_swig_tag Linking CXX executable _lte_swig_doc_tag [ 14%] Building CXX object lib/CMakeFiles/gnuradio-lte.dir/lte_layer_demapper_vcvc.cc.o [ 14%] Built target _lte_swig_swig_tag [ 14%] Built target pygen_python_fd902 [ 14%] [ 16%] [ 19%] Built target _lte_swig_doc_tag Building CXX object lib/CMakeFiles/gnuradio-lte.dir/lte_pbch_demux_vcvc.cc.o Scanning dependencies of target pygen_swig_07e0e Building CXX object lib/CMakeFiles/gnuradio-lte.dir/lte_pre_decoder_vcvc.cc.o [ 21%] Generating doxygen xml for lte_swig_doc docs [ 23%] Generating lte_swig_doc.i [ 26%] Building CXX object lib/CMakeFiles/gnuradio-lte.dir/lte_extract_occupied_tones_vcvc.cc.o [ 28%] Building CXX object lib/CMakeFiles/gnuradio-lte.dir/lte_remove_cp_cvc.cc.o In file included from /home/lte1/Downloads/gr-lte-gnuradio-v3.6.5.1/code/lib/lte_qpsk_soft_demod_vcvf.cc:26:0: /home/lte1/Downloads/gr-lte-gnuradio-v3.6.5.1/code/include/lte_qpsk_soft_demod_vcvf.h:49:29: *error: ‘std::sqrt’ cannot appear in a constant-expression[ 30%] * /home/lte1/Downloads/gr-lte-gnuradio-v3.6.5.1/code/include/lte_qpsk_soft_demod_vcvf.h:49:35: *error: a function call cannot appear in a constant-expression* /home/lte1/Downloads/gr-lte-gnuradio-v3.6.5.1/code/include/lte_qpsk_soft_demod_vcvf.h:49:35: *error: ISO C++ forbids initialization of member ‘d_SQRT2’ [-fpermissive]* /home/lte1/Downloads/gr-lte-gnuradio-v3.6.5.1/code/include/lte_qpsk_soft_demod_vcvf.h:49:35: *error: making ‘d_SQRT2’ static [-fpermissive]* Generating lte_swig.tag [ 33%] Swig source make[2]: *** [lib/CMakeFiles/gnuradio-lte.dir/lte_qpsk_soft_demod_vcvf.cc.o] Error 1 make[2]: *** Waiting for unfinished jobs.... make[1]: *** [lib/CMakeFiles/gnuradio-lte.dir/all] Error 2 make[1]: *** Waiting for unfinished jobs.... [ 38%] [ 38%] Generating lte_swig.pyo Generating lte_swig.pyc [ 38%] Built target pygen_swig_07e0e make: *** [all] Error 2 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ *My Solution :* I went to line 49 of file lte_qpsk_soft_demod_vcvf.h, remove the declaration of float d_SQRT2 and its initialization i.e. std::sqrt(2) and made it a global declaration. And it worked for me as I am able to the lte block in grc. Is this patch wrong ! Somehow I am having doubt over it -- View this message in context: http://gnuradio.4.n7.nabble.com/gr-lte-error-tp45675.html Sent from the GnuRadio mailing list archive at Nabble.com. _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio