[PATCH] Provide posix_spawn implementation

[Petr Hosek <phosek at chromium dot org>]

I have ported over posix_spawn implementation from FreeBSD to newlib.
It implements posix_spawn interface in terms of existing POSIX
interfaces, in particular vfork and exec.

This should make it easier to port existing code which uses
posix_spawn, which is already supported by glibc as well as all BSD
variants. In the longer term, posix_spawn could be also interesting to
Cygwin as the interface is more akin to CreateProcess provided by
Windows so the applications using posix_spawn instead of fork/vfork
would get performance improvement compared to the current fork
emulation.

Attachment: posix_spawn.patch
Description: Binary data