This mysterious C ++ (std :: min and static const int)

Suddenly, it turned out that g ++ does not compile (or rather does not link) the following code (it works in MS VS 2008)

#include <algorithm>

struct Test
{
static const int a = 0, b = 1;
};

int main()
{
std::min(Test::a, Test::b);
return 0;
}

* This source code was highlighted with Source Code Highlighter .

with a diagnosis of:

 Fail.cpp :(. Text + 0x15): undefined reference to `Test :: a '
 ...

')
If we assign values ​​to constants outside the class (const int Test :: a = 0), then everything works.