Hi Yan,

which tutorial exactly where you following (URL)?
I recommend using the Guided Tutorials for beginners; they are much
better illustrated, and they don't need the sometimes broken howto
infrastructure.
https://gnuradio.org/redmine/projects/gnuradio/wiki/Guided_Tutorials

Best regards,
Marcus

On 25.11.2015 15:45, Yan Huang wrote:
>
> Hey,
>
> I’m a new to use gnuradio and USRP B210, now I want to generate my OOT
> module start with the example ‘howto_detect’, and I followed guided
> tutorial in gnuradio.org. But there are still some problems as follows.
>
>  
>
> [  6%] Building CXX object
> lib/CMakeFiles/gnuradio-howto.dir/howto_detect_ff_impl.cc.o
> /home/mint/Documents/gr-howto/lib/howto_detect_ff_impl.cc:32:5: error:
> prototype for ‘gr::howto::howto_detect_ff::sptr
> gr::howto::howto_detect_ff::make(float, int, int)’ does not match any
> in class ‘gr::howto::howto_detect_ff’
>      howto_detect_ff::make(float pfa, int L, int samples)
>      ^
> In file included from
> /home/mint/Documents/gr-howto/lib/howto_detect_ff_impl.h:24:0,
>                  from
> /home/mint/Documents/gr-howto/lib/howto_detect_ff_impl.cc:26:
> /home/mint/Documents/gr-howto/include/howto/howto_detect_ff.h:49:19:
> error: candidate is: static gr::howto::howto_detect_ff::sptr
> gr::howto::howto_detect_ff::make()
>        static sptr make();
>                    ^
> /home/mint/Documents/gr-howto/lib/howto_detect_ff_impl.cc: In
> constructor
> ‘gr::howto::howto_detect_ff_impl::howto_detect_ff_impl(float, int, int)’:
> /home/mint/Documents/gr-howto/lib/howto_detect_ff_impl.cc:52:24:
> error: expression cannot be used as a function
>                d_pfa(pfa), d_L(L), d_samples(samples))
>                         ^
> /home/mint/Documents/gr-howto/lib/howto_detect_ff_impl.cc:52:32:
> error: expression cannot be used as a function
>                d_pfa(pfa), d_L(L), d_samples(samples))
>                                 ^
> /home/mint/Documents/gr-howto/lib/howto_detect_ff_impl.cc:52:52:
> error: expression cannot be used as a function
>                d_pfa(pfa), d_L(L), d_samples(samples))
>                                                     ^
> /home/mint/Documents/gr-howto/lib/howto_detect_ff_impl.cc: In function
> ‘float gr::howto::TracyWidom(float)’:
> /home/mint/Documents/gr-howto/lib/howto_detect_ff_impl.cc:71:46:
> error: ‘printf’ was not declared in this scope
>  tw = 18*(pd - (17/75)); printf("a - %f\n", tw);
>                                               ^
> /home/mint/Documents/gr-howto/lib/howto_detect_ff_impl.cc:73:47:
> error: ‘printf’ was not declared in this scope
>  tw = 8*(pd - (179/400)); printf("b - %f\n", tw);
>                                                ^
> /home/mint/Documents/gr-howto/lib/howto_detect_ff_impl.cc:75:53:
> error: ‘printf’ was not declared in this scope
>  tw = (87/20)*(pd - (643/870)); printf("c - %f\n", tw);
>                                                      ^
> /home/mint/Documents/gr-howto/lib/howto_detect_ff_impl.cc:77:52:
> error: ‘printf’ was not declared in this scope
>  tw = (16/5)*(pd - (287/320)); printf("d - %f\n", tw);
>                                                     ^
> /home/mint/Documents/gr-howto/lib/howto_detect_ff_impl.cc:79:52:
> error: ‘printf’ was not declared in this scope
>  tw = (17/5)*(pd - (297/340)); printf("e - %f\n", tw);
>                                                     ^
> /home/mint/Documents/gr-howto/lib/howto_detect_ff_impl.cc:81:49:
> error: ‘printf’ was not declared in this scope
>  tw = (5.2)*(pd - (0.813)); printf("f - %f\n", tw);
>                                                  ^
> /home/mint/Documents/gr-howto/lib/howto_detect_ff_impl.cc:83:53:
> error: ‘printf’ was not declared in this scope
>  tw = (53/5)*(pd - (909/1060)); printf("g - %f\n", tw);
>                                                      ^
> /home/mint/Documents/gr-howto/lib/howto_detect_ff_impl.cc:85:48:
> error: ‘printf’ was not declared in this scope
>  tw = 26*(pd - (593/650)); printf("h - %f\n", tw);
>                                                 ^
> /home/mint/Documents/gr-howto/lib/howto_detect_ff_impl.cc:87:56:
> error: ‘printf’ was not declared in this scope
>  printf ("wrong pfa value: it must be between 0 and 1\n");
>                                                         ^
> /home/mint/Documents/gr-howto/lib/howto_detect_ff_impl.cc: In member
> function ‘virtual int
> gr::howto::howto_detect_ff_impl::general_work(int, gr_vector_int&,
> gr_vector_const_void_star&, gr_vector_void_star&)’:
> /home/mint/Documents/gr-howto/lib/howto_detect_ff_impl.cc:141:9:
> error: ‘gsl_matrix’ was not declared in this scope
>          gsl_matrix * hankel = gsl_matrix_alloc (lenght,d_L);
>          ^
> /home/mint/Documents/gr-howto/lib/howto_detect_ff_impl.cc:141:22:
> error: ‘hankel’ was not declared in this scope
>          gsl_matrix * hankel = gsl_matrix_alloc (lenght,d_L);
>                       ^
> /home/mint/Documents/gr-howto/lib/howto_detect_ff_impl.cc:141:59:
> error: ‘gsl_matrix_alloc’ was not declared in this scope
>          gsl_matrix * hankel = gsl_matrix_alloc (lenght,d_L);
>                                                            ^
> /home/mint/Documents/gr-howto/lib/howto_detect_ff_impl.cc:142:22:
> error: ‘V’ was not declared in this scope
>          gsl_matrix * V = gsl_matrix_alloc (d_L,d_L);
>                       ^
> /home/mint/Documents/gr-howto/lib/howto_detect_ff_impl.cc:143:9:
> error: ‘gsl_vector’ was not declared in this scope
>          gsl_vector * S = gsl_vector_alloc (d_L);
>          ^
> /home/mint/Documents/gr-howto/lib/howto_detect_ff_impl.cc:143:22:
> error: ‘S’ was not declared in this scope
>          gsl_vector * S = gsl_vector_alloc (d_L);
>                       ^
> /home/mint/Documents/gr-howto/lib/howto_detect_ff_impl.cc:143:47:
> error: ‘gsl_vector_alloc’ was not declared in this scope
>          gsl_vector * S = gsl_vector_alloc (d_L);
>                                                ^
> /home/mint/Documents/gr-howto/lib/howto_detect_ff_impl.cc:144:22:
> error: ‘temp’ was not declared in this scope
>          gsl_vector * temp = gsl_vector_alloc (d_ L);
>                       ^
> /home/mint/Documents/gr-howto/lib/howto_detect_ff_impl.cc:144:47:
> error: ‘d_’ was not declared in this scope
>          gsl_vector * temp = gsl_vector_alloc (d_ L);
>                                                ^
> /home/mint/Documents/gr-howto/lib/howto_detect_ff_impl.cc:147:36:
> error: ‘gsl_matrix_set_zero’ was not declared in this scope
>          gsl_matrix_set_zero (hankel);
>                                     ^
> /home/mint/Documents/gr-howto/lib/howto_detect_ff_impl.cc:156:47:
> error: ‘fopen’ was not declared in this scope
>              story = fopen("filestory.txt", "a");
>                                                ^
> /home/mint/Documents/gr-howto/lib/howto_detect_ff_impl.cc:159:60:
> error: ‘gsl_matrix_set’ was not declared in this scope
>                      gsl_matrix_set (hankel, p, j, vett[p+j]);
>                                                             ^
> /home/mint/Documents/gr-howto/lib/howto_detect_ff_impl.cc:162:57:
> error: ‘gsl_linalg_SV_decomp’ was not declared in this scope
>                  gsl_linalg_SV_decomp (hankel, V, S, temp);
>                                                          ^
> /home/mint/Documents/gr-howto/lib/howto_detect_ff_impl.cc:163:43:
> error: ‘gsl_vector_get’ was not declared in this scope
>                  lmax = gsl_vector_get(S, 0);
>                                            ^
> /home/mint/Documents/gr-howto/lib/howto_detect_ff_impl.cc:167:79:
> error: ‘fprintf’ was not declared in this scope
>                  fprintf(story, "%f - ratio=%f - soglia=%f\n ", mem,
> ratio, thr);
>                                                                               
> ^
> /home/mint/Documents/gr-howto/lib/howto_detect_ff_impl.cc:168:29:
> error: ‘fclose’ was not declared in this scope
>                  fclose(story);
>                              ^
> make[2]: ***
> [lib/CMakeFiles/gnuradio-howto.dir/howto_detect_ff_impl.cc.o] Error 1
> make[1]: *** [lib/CMakeFiles/gnuradio-howto.dir/all] Error 2
> make: *** [all] Error 2
>
>
> Any solution to sort an error will be appreciated.
>
>
> Thanks a lot,
>
>  
>
> Yan
>
>  
>
>
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