I got a problem while installing the GNU Scientific Library (gsl). I put the package on my desktop, and did "./configure", "make", and "sudo make install", according to the document included. I checked the /usr/local/include directory, there is a newly created "gsl" folder in there. But When I tried to use the functions provided by the library, the "undefined reference to 'gsl_sf_beta_inc'" error occurred. Here is my code.
#include <stdio.h>
#include <gsl/gsl_sf_gamma.h>
int main (void)
{
double a = 20;
double b = 1000;
double x = 0.5;
double result = gsl_sf_beta_inc(a, b, x);
printf("%f/d", result);
return 0;
}
I sensed that the problem might be caused by the fact I put the package on the desktop, so the binary code generated by the "make" command goes there, which is wrong. So, is my guess correct? If it is, where should I put them? If it is not, what should I do? Thanks.
You need to link the library, assuming the make install was successful.
The gsl's documentation says this should work
(note the two necessary linking options for gsl to work: "-lgsl -lgslcblas"):
gcc -I/usr/local/include -L/usr/local/lib main.c -o main -lgsl -lgslcblas -lm
Alternative "cblas" instead of gsl's cblas is also possible as per: alternate cblas for gsl