Re: [Bug-gsl] interpo

[Patrick Alken]

Are you sure you're linking against the new 2.0 library? When I do:

gsl/doc/examples> gcc -g -Wall -o interp2d interp2d.c -lgsl -lgslcblas -lm

it compiles fine with no problems.

On 10/31/2015 04:16 PM, Raymond Rogers wrote:
> 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
>>
>