ustring = "1.2"

["Jamiil Abduqadir" <jalqadir gmail com>]

Gtkmm for Win32
windows xp

Hello folks!

In the following  example 
class MyClass{
Glib::ustring str;
MyClass();
~MyClass();
};
MyClass::MyClass(){ str = "1.2";}
MyClass::~MyClass(){}


I get an error that reads
Undefined reference to Glib::ustring::operator=(char const*)

Why am I getting this error and how can I solve the problem?

Thanks in advance.

-- 
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