[cfe-dev] Clang++ always defines _GNU_SOURCE

[Joerg Sonnenberger via cfe-dev]

On Tue, Jun 14, 2016 at 04:40:50PM +0800, Lei Zhang via cfe-dev wrote:
> I understand that g++ does this because stdlibc++ heavily relies on
> _GNU_SOURCE. But what is the reason for clang++ to do so when using
> libc++? Does libc++ also rely on this macro to work on Linux?

I would assume that many of the same stupid visibility restrictions
apply to libc++ just as well.

Joerg