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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/69549] Named Address Spaces does not compile in C++
Date: Mon, 22 Mar 2021 20:20:49 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D69549

--- Comment #6 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Thiago Macieira from comment #5)
> BTW, Clang solved this by making __seg_fs, __seg_gs macros that resolve to
> __attribute__:
....
> That way, they don't need to be deduced as qualifiers in C, like const,
> volatile and _Atomic.

You still need to handle the attribute like qualifiers ....

> So this compiles with Clang in C++:
>=20
> void *tid() { auto tib =3D (void * __seg_fs*)(0); return *tid; }

The above is not the reason why namespaces are not handled in GCC's C++
front-end.  The reason why they are not handled in C++ is because you need =
to
handle them in overloads and templates correctly.  Does clang handle those
correctly or does it ignore that issue?=