RFR: JDK-8058631 Rename posix to unix in build system to match file name changes

[Martin Buchholz]

Philosophically, there's more variation among unices than windows, but
windows OSes certainly have some variation over time.  Especially if you
count the Win98 family, thankfully no longer supported.

On Wed, Sep 24, 2014 at 5:39 AM, Magnus Ihse Bursie <
magnus.ihse.bursie at oracle.com> wrote:

>
> Also, this means that OS_API is slightly misleading -- we're not actually
> checking for an API such as POSIX, but the general category of OSes. I'll
> rename the *_OS_API to *_OS_TYPE instead. The "winapi" OS_API was never
> used, and is removed -- we only need to check for "windows", there's no
> need to introduce an abstract "winapi" category.
>