Including <cerrno> instead of <errno.h>, does it upset POSIX?

[David Redondo]

Looking into the C++ 17 working draft (http://open-std.org/JTC1/SC22/WG21/
docs/papers/2017/n4659.pdf) <cerrno> is actually the same as the POSIX header.

In section 22.4 (page 517)
>The contents of the header<cerrno>are the same as the POSIX header<errno.h>, 
except thaterrnoshallbe defined as a macro. [Note:The intent is to remain in 
close alignment with the POSIX standard.— endnote] A separateerrnovalue shall 
be provided for each thread.

And at the bottom of 22.4.1
>The meaning of the macros in this header is defined by the POSIX standard.

Regards,
David

P.S. In the latest working draft this seems now to be section 19.4 instead