Re: [Bug-gsl] interpo

[Raymond Rogers]

Same here on Ubuntu 14.04 ; except I had to add "-fpermissive"  to 
transfer error to warning for:
"
warning: invalid conversion from ‘void*’ to ‘double*’ [-fpermissive]
   double *za = malloc(nx * ny * sizeof(double));
"
I looked in gsl-1.99.90/interpolation
And it seems that the test program uses gsl_interp2d_bilinear in a 
different manner; but I haven't tracked it back.

Here is my output (about the same as yours
g++ solution.cpp -fpermissive -lgslcblas
solution.cpp: In function ‘int main()’:
solution.cpp:17:47: warning: invalid conversion from ‘void*’ to 
‘double*’ [-fpermissive]
   double *za = malloc(nx * ny * sizeof(double));
                                               ^
/tmp/ccKzCJc1.o: In function `main':
solution.cpp:(.text+0xe): undefined reference to `gsl_interp2d_bilinear'
solution.cpp:(.text+0x7f): undefined reference to `gsl_spline2d_alloc'
solution.cpp:(.text+0x88): undefined reference to `gsl_interp_accel_alloc'
solution.cpp:(.text+0x91): undefined reference to `gsl_interp_accel_alloc'
solution.cpp:(.text+0xb3): undefined reference to `gsl_spline2d_set'
solution.cpp:(.text+0xd5): undefined reference to `gsl_spline2d_set'
solution.cpp:(.text+0x105): undefined reference to `gsl_spline2d_set'
solution.cpp:(.text+0x127): undefined reference to `gsl_spline2d_set'
solution.cpp:(.text+0x14b): undefined reference to `gsl_spline2d_init'
solution.cpp:(.text+0x20e): undefined reference to `gsl_spline2d_eval'
solution.cpp:(.text+0x2a5): undefined reference to `gsl_spline2d_free'
solution.cpp:(.text+0x2b1): undefined reference to `gsl_interp_accel_free'
solution.cpp:(.text+0x2bd): undefined reference to `gsl_interp_accel_free'
collect2: error: ld returned 1 exit status


On 10/29/2015 05:48 PM, Stefano Nicotri wrote:
> Dear bug-gsl,
>
>
> I have tried to compile my C++ source code, which makes use of the gsl 
> interp2d library (trying to adapt the example at 
> http://www.gnu.org/software/gsl/manual/html_node/2D-Interpolation-Example-programs.html#g_t2D-Interpolation-Example-programs), 
> but it seems that some libraries cannot be found:
>
> → g++ solution.cpp -lgsl -lgslcblas
> solution.cpp: In function ‘int main()’:
> solution.cpp:51:2: error: ‘gsl_interp2d_type’ was not declared in this 
> scope
>   gsl_interp2d_type *T = gsl_interp2d_bilinear;
>   ^
> solution.cpp:51:21: error: ‘T’ was not declared in this scope
>   gsl_interp2d_type *T = gsl_interp2d_bilinear;
>                      ^
> solution.cpp:51:25: error: ‘gsl_interp2d_bilinear’ was not declared in 
> this scope
>   gsl_interp2d_type *T = gsl_interp2d_bilinear;
>                          ^
> solution.cpp:67:46: error: invalid conversion from ‘void*’ to 
> ‘double*’ [-fpermissive]
>   double *za = malloc(nr * nt * sizeof(double));
>                                               ^
> solution.cpp:68:3: error: ‘gsl_spline2d’ was not declared in this scope
>    gsl_spline2d *spline = gsl_spline2d_alloc(T, nr, nt);
>    ^
> solution.cpp:68:17: error: ‘spline’ was not declared in this scope
>    gsl_spline2d *spline = gsl_spline2d_alloc(T, nr, nt);
>                  ^
> solution.cpp:68:54: error: ‘gsl_spline2d_alloc’ was not declared in 
> this scope
>    gsl_spline2d *spline = gsl_spline2d_alloc(T, nr, nt);
>                                                       ^
> solution.cpp:100:39: error: ‘gsl_spline2d_set’ was not declared in 
> this scope
>    gsl_spline2d_set(spline, za, r, t, A);
>                                        ^
> solution.cpp:106:46: error: ‘gsl_spline2d_init’ was not declared in 
> this scope
>   gsl_spline2d_init(spline, ra, ta, za, nr, nt);
>                                               ^
> solution.cpp:109:53: error: ‘gsl_spline2d_eval’ was not declared in 
> this scope
>   Aval = gsl_spline2d_eval(spline, 2., 2., racc, tacc);
>                                                      ^
> solution.cpp:113:26: error: ‘gsl_spline2d_free’ was not declared in 
> this scope
>   gsl_spline2d_free(spline);
>                           ^
>
>
>
> I have downloaded GSL from this link --> 
> http://mirrors.muzzy.it/gnu/gsl/gsl-latest.tar.gz and I have compiled 
> it with
>
> ./configure
> make
> sudo make install
>
>
> My OS is Ubuntu 14.04.
> Is it a problem with my system or is some component missing?
>
> Thank you very much, and many apologies for bothering you.
>
> cheers,
>     stefano

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Raymond Rogers