Can't link C library

[alexeypetrushin]

Finally... I found the missing piece `{.passL: "-lgsl".}`, working code
    
    
    {.passL: "-lgsl".}
    proc gsl_sf_bessel_J0*(x: cdouble): cdouble {.cdecl, importc: 
"gsl_sf_bessel_J0", dynlib: "libgsl.dylib".}
    echo gsl_sf_bessel_J0(5.0)
    
    
    Run