Re: [Help-gsl] Problem with GSL on my macbook

[David Schaich]

What command(s) are you using to compile and link?  You need to link 
against the library using -lgsl -lgslcblas -lm.  See the manual for more 
information:
http://www.gnu.org/software/gsl/manual/html_node/Compiling-and-Linking.html
http://www.gnu.org/software/gsl/manual/html_node/Linking-programs-with-the-library.html

-David


Alexis Quentin wrote:
> Hi every one,
> I want to use the GSL on my macbook. So I installed it using darwinports.
> Then I wrote a C program :
>
> #include <stdio.h>
> #include <gsl/gsl_sf_bessel.h>
>
> int
> main (void)
> {
>   double x = 5.0;
>   double y = gsl_sf_bessel_J0 (x);
>   printf ("J0(%g) = %.18e\n", x, y);
>   return 0;
> }
>
> I wrote it with XCode (Carbon). When I compile (with gcc), my terminal
> answer me :
> /usr/bin/ld: Undefined symbol:
> _gsl_sf_bessel_J0
> collect2: ld returned 1 exit status
>
> Can you help me to make gsl working?