[cfe-dev] libc++ supporting older compilers

[Dan Albert via cfe-dev]

I doubt you can build libstdc++ with clang. Using libstdc++ from clang
*mostly* works, but I've definitely had reports of certain pieces not
working (particularly in places like <atomic> and <type_traits>, iirc).
Note that this was with libstdc++ 4.9. I don't know if that has improved in
5+.

On Sat, Dec 19, 2015 at 12:54 PM, Renato Golin via cfe-dev <
cfe-dev at lists.llvm.org> wrote:

> On 18 December 2015 at 23:22, Eric Fiselier via cfe-dev
> <cfe-dev at lists.llvm.org> wrote:
> > 4.7          | 4661         | 126
> > 4.8          | 4015         | 772
> > 4.9          | 4775         | 12  * 10 are missing "is_trivially_" type
>
> This up and down looks odd...
>
>
> > I'm not trying to artificially limit support but I am trying to keep it
> > moving forward. With limited resources
> > I want to focus on support for C++1z and new libraries like filesystem.
> Most
> > libc++ users use clang,
> > and clang gave us full C++11 support in 3.0.It's time we demand it from
> > other compilers.
>
> Doesn't libstdc++ require GCC? Or can it be compiled with Clang?
>
> I'm already bootstrapping Clang to compile libc++ on ARM and AArch64,
> as I got some compilation errors with GCC 4.8. I don't remember the
> errors, as that was several months ago.
>
> --renato
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