[Help-gsl] Re: Random number generator: compiling issue on a Mac (10.4.11)

[Marco Tului]

By the way, if I write instead by terminal simply "g++ -c
random_generator.cpp" I don't receive errors: it seems to be fine. How's
possible?

Thanks again,

Marco Tului.




On Sat, Apr 11, 2009 at 3:52 PM, Marco Tului <address@hidden> wrote:

> Hi all,
> excuse me, I've compiled and installed the GSL on my Mac, running Mac Os
> 10.4.11 (Tiger). Now I'm trying to compile a random number generator class,
> for a library of mine. Here the code:
>
>
> ::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
> #ifndef RANDOM_GENERATOR__HPP
> #define RANDOM_GENERATOR__HPP
>
>
> #include <gsl/gsl_rng.h> // here we use the "GNU Scientific Library" (GSL)
> to obtain a random number
> #include <gsl/gsl_randist.h> // to obtain gsl_ran_gaussian_pdf()
> #include <iostream>
> using namespace std;
>
>
> enum Distribution_type {
>   NORMAL = 1,
>   UNIFORM = 2,
>   BINARY = 3
> };
>
>
> class Random_generator {
>
>   private:
>     const gsl_rng_type *_type_gen;
>     gsl_rng *_gen; // 'gen' is the (random) generator
>
>     Distribution_type _distr_type;
>
>
>   public:
>     // default CONSTRUCTOR
>     Random_generator( ) {
>       _type_gen = gsl_rng_default;
>       _gen = gsl_rng_alloc(_type_gen); // in this way we allocate, in the
> standard way, the generator 'gen'
>     };
>
>     // DESTRUCTOR
>     ~Random_generator( ) {
>       gsl_rng_free(_gen); // we free the memory associated with the
> generator 'r'
>     };
>
>
>     double Get_rnd_generator( ) { // by default we assume Distribution_type
> = NORMAL
>       return gsl_ran_gaussian(_gen, 1) ;
>     };
>
>
>
>     double Get_rnd_generator(Distribution_type distr_type_init) {
>       if(distr_type_init == NORMAL) {
>         return gsl_ran_gaussian(_gen, 1);
>       }
>       else if(distr_type_init == UNIFORM) {
>         // return sample da distribuzione uniforme...
>       }
>       else if(distr_type_init == BINARY) {
>         // return sample da distribuzione binaria
>       }
>     };
>
>
>
>     // vv implementare delle funzioni di interfaccia, ad esempio per far in
> modo ci sia controllo sul corretto valore
>     // di sigma (che non sia negativo) etc.
>
>
>  /*
>     // CONSTRUCTOR for obtaining a random number from a Gaussian
> distribution,
>     // centered in the desired value and with the requested sigma
>     Random(double mu, double sigma) {
>       double x, z;
>       type_gen = gsl_rng_default;
>       gen = gsl_rng_alloc(type_gen); // in this way we allocate, in the
> standard way, the generator 'r'
>
>       x = gsl_ran_gaussian(gen, sigma);
>       z = mu + x;
>       Set_random(z);
>     };
> */
>
>
> };
>
>
> #endif
> ::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
>
>
> By terminal, I write "g++ -c random_generator.cpp -lgsl -lgslcblas -lm" but
> I obtain in response the following errors:
>
> i686-apple-darwin8-g++-4.0.1: -lgsl: linker input file unused because
> linking not done
> i686-apple-darwin8-g++-4.0.1: -lgslcblas: linker input file unused because
> linking not done
> i686-apple-darwin8-g++-4.0.1: -lm: linker input file unused because linking
> not done
>
> I don't understand this: could anyone help me? Please, it's important, and
> quite urgent.
>
>
>
> Thanks in advance,
>
> Marco Tului.
>