Re: Mismatch between newlib and glibc regarding fileno

On 2024-02-12 19:14, Joseph Myers wrote:
> On Mon, 12 Feb 2024, Corinna Vinschen wrote:
> 
>> How is it possible that with -std=c++98, everything and the kitchen sink
>> is enabled?  Is that really correct?!?
> 
> See <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=11196> (though
> <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=2082> is older).  Much of
> the standard C++ library implementation is in the headers, which makes it
> tricky to implement without _GNU_SOURCE when the C++ library wants to use
> (internally) lots of features not in ISO C.
> 

So, based on this, is it correct that newlib includes the check for 
__STRICT_ANSI__?

I.e., should GCC tests be updated to add -D_POSIX_SOURCE or should the 
check for __STRICT_ANSI__ be removed from the newlib features.h file? Or 
maybe both should be done?

Kind regards,
Torbjörn