message: A thread_local was missing
diff: @@ -1057,7 +1057,10 @@ class Simplex_tree {
  Dictionary_it next = siblings->members().begin();
  ++next;
  - thread_local std::vector<std::pair<Vertex_handle, Node> > inter;
  +#ifdef GUDHI_CAN_USE_CXX11_THREAD_LOCAL
  + thread_local
  +#endif // GUDHI_CAN_USE_CXX11_THREAD_LOCAL
  + std::vector<std::pair<Vertex_handle, Node> > inter;
  for (Dictionary_it s_h = siblings->members().begin();
  s_h != siblings->members().end(); ++s_h, ++next) {
  Simplex_handle root_sh = find_vertex(s_h->first);
  