(std::string("Possible values: ")+contexts_list()).c_str(),
context_factories[0].first);
-int smx_context_stack_size;
+unsigned smx_context_stack_size;
int smx_context_stack_size_was_set = 0;
-int smx_context_guard_size;
+unsigned smx_context_guard_size;
int smx_context_guard_size_was_set = 0;
#if HAVE_THREAD_LOCAL_STORAGE
static XBT_THREAD_LOCAL smx_context_t smx_current_context_parallel;