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Hello, I have installed the GSL libs via setup and am trying to get the following example program to work:
#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; }
The compiler/linker is able to locate the header ok, but the error message I get on the line that calls the function is:
undefined reference to `_gsl_sf_bessel_J0'
Somehow the function name got mangled with an added underscore, and of course, it doesn't exist.
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