On Tue, 21 Jan 2020 at 22:51, Anton Shepelev <anton.txt@xxxxxxxxx> wrote: > Thank you for the explanation. Is it possible to > make the current GCC with -std=CNN behave as you in- > tend it to? Will, for example, the following suf- > fice: 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. Until that changes, _GNU_SOURCE needs to be defined.
