[pskocik]

I don't understand why someone thought it was a good idea to require that POSIX stdio should lock the thread. It slows down stdio several times compared to the nonlocking version, and it completely goes against "don't pay for what you don't use" as single threaded programs have to pay the cost too. And locking and unlocking the stream manually is like two lines of code, which a person writing MT code should be well capable of writing.