Comment 4 for bug 659107

there's a very important thing to consider: sbcl could work fine without the host system being configured properly.

IOW, there's an unnecessary coupling between the posix locale environment variable and locale compilation voodoo, and sbcl's external format machinery. they are pretty much independent except the initialization phase, so why couple them? or at least why not provide a method of configuring them independently, even if sbcl's default comes from the posix stuff...