static const class member is undefined

[Erdi Chen <erdi at chen11 dot com>]

G++ creates undefined symbols for static const class member variables 
for the test code in the attached file.   The version of gcc that I've 
used is

gcc version 3.3.2 20031022 (Gentoo Linux 3.3.2-r3, propolice)

gcc 3.2.3 from Gentoo

gcc version 3.3.2 20031022 (Red Hat Linux 3.3.2-1)   Fedora Core 1
class Foo
{
public:
    static const int a = 1;
    static const int b = 2;
    static const int c = 3;
    static const int d = 4;
};

class Bar
{
public:
    int bar(int n);
};

int Bar::bar(int n)
{
    /* // this is okay
    if (n != 0) return Foo::c;
    else return Foo::d;
    */
    //return Foo::c; // this is okay
    return n != 0 ? Foo::c : Foo::d; // Foo::c and Foo::d undefined
}