[Discuss-gnuradio] gr-lte error

[sumitstop]

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 




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