Are C++11 thread_local variables automatically static?

Question

Is there a difference between these two code segments:

void f() {
    thread_local vector V;
    V.clear();
    ... // use V as a temporary variab         


        

Answer 1

When used with thread_local, static is implied in block-scope (see @Vlad's answer), requied for a class member; I guess, means linkage for namespace scope.

Per 9.2/6:

Within a class definition, a member shall not be declared with the thread_local storage-class-specifier unless also declared static

To answer the original question:

Are C++11 thread_local variables automatically static?

There is no choice, except for namespace-scope variables.

Is there a difference between these two code segments:

No.