Re: gcc 8.2.0: missing _fileno() for c++11

Eli Zaretskii:

> Doesn't -std=c++11 request strict ANSI C++?  _fileno is
> non-ANSI, and thus isn't visible in a strict-ANSI
> compilation.  I suggest to try the option -std=gnu++11
> instead.

But you are right -- why should one expect a non-standard
function or macro in a standard header if MinGW is not
obliged to implement POSIX?  On the other hand, this worked
with GCC 4.*...

Since the project I am trying to build and contribute to is
configured not to use the GNU extensions, I have to find
another way of acessing fileno/_fileno.  May I link it in
manually from the MinGW library in which it *is*
implemented?  Or may I, perhaps, ask to to implement fileno
as a favour?

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