Compiling blitz++ programs

[Torquil Macdonald Sørensen <torquil@gmail.com>]

Hello, how come I can compile and run a blitz++-program without linking 
with -lblitz ?

The following program works both when compiled with g++ with or without 
the -lblitz option. Running "ldd a.out" afterwards shows that it is linked 
woth libblitz in the first case, and not in the other. But the program still 
runs fine.

Best regards,
Torquil Sørensen

#include <iostream>
#include <blitz/array.h>

using namespace std; using namespace blitz;

int main() {
        Array<int,2> a(3,3), b(3,3), c(3,2);
        Array<int,2> d(3,3), e(3,2);

        // Needed to do matrix multiplication by means of tensor notation
        firstIndex i; secondIndex j; thirdIndex k;

        // Can initialize all elements in one command
        a = 1; b = 1; c = 1; d = 0; e = 0;

        // Matrix Addition
        d = a + b;

        // Matrix multiplication, using tensor notation
        e = sum(a(i,k)*c(k,j),k);

        cout << "a:" << endl << a << endl;
        cout << "b:" << endl << b << endl;
        cout << "c:" << endl << c << endl;
        cout << "a + b:" << endl << d << endl;
        cout << "a*c:" << endl << e << endl;

        return(0);
}