ap_lua_init_mutex() is not about thead only . It also calls
apr_global_mutex_child_init(). So I see no good reason to skip this hook
if !APR_HAS_THREADS.
Some #if APR_HAS_THREADS are also already in place in
ap_lua_init_mutex() anyway.
@@ -2175,9 +2175,8 @@ static void lua_register_hooks(apr_pool_t *p)
/* Hook this right before FallbackResource kicks in */
ap_hook_fixups(lua_map_handler_fixups, NULL, NULL, AP_LUA_HOOK_LAST-2);
-#if APR_HAS_THREADS
ap_hook_child_init(ap_lua_init_mutex, NULL, NULL, APR_HOOK_MIDDLE);
-#endif
+
/* providers */
lua_authz_providers = apr_hash_make(p);
