How do I declare static class data member which are thread local?

Asked Feb 17 '21 at 16:06

Active Feb 17 '21 at 16:06

Viewed 599 times

I have been working on a learning project in C++(11) and I want to implement something analogous to -

class ImpClass
{
    static __thread Foo foo;

    void doSomething()
    {
        ImpClass::foo.doSomeOtherThing();
        // do something;
    }
};

But compiling this results into undefined reference to 'ImpClass::foo[abi:cxx11]'

when using thread_local instead of __thread, it says undefined reference to 'TLS init function for ImpClass::foo[abi:cxx11]'.

I am using gcc compiler (version : 9.3.0)

asked Feb 17 '21 at 16:06

Nitesh Meena

3

Well, you have to define static member variables somewhere. Pick your favourite .cpp file and put the definition there. It has nothing to do with `thread_local`. – Quimby Feb 17 '21 at 16:09
1

@Quimby, that worked. Thanks. – Nitesh Meena Feb 17 '21 at 16:16
Same as here. https://stackoverflow.com/questions/1563897/static-constant-string-class-member – Devolus Feb 17 '21 at 16:17

How do I declare static class data member which are thread local?

0 Answers0