On Wed, 22 Jan 2020 at 09:05, Anton Shepelev <anton.txt@xxxxxxxxx> wrote: > > Jonathan Wakely to Anton Shepelev: > > > > Thank you for the explanation. Is it possible > > > to make the current GCC with -std=CNN behave as > > > you intend it to? Will, for example, the follow- > > > ing suffice: gcc -std=c++11 -U_GNU_SOURCE ? > > > > No, if it was that easy it would have been done > > long ago. > > > > The reason g++ defines _GNU_SOURCE is that > > libstdc++ relies on GNU extensions. > > No good. It's perfectly fine for the GNU C++ standard library to rely on extensions in the GNU C standard library. The problem is exposing *all* those extensions to user code, when we only need a few. > > Until that changes, _GNU_SOURCE needs to be de- > > fined. > > Thank you for the explanation, Jonathan. >
