[libcxx] r293154 - Use the new __has_feature(cxx_constexpr_string_builtins) for detection of the C-string intrinsics for constexpr support in std::char_traits. Thanks to Richard for the intrisic support.

[Marshall Clow via cfe-commits]

On Wed, Jan 25, 2017 at 10:58 PM, Marshall Clow via cfe-commits <
cfe-commits at lists.llvm.org> wrote:

> Author: marshall
> Date: Thu Jan 26 00:58:29 2017
> New Revision: 293154
>
> URL: http://llvm.org/viewvc/llvm-project?rev=293154&view=rev
> Log:
> Use the new __has_feature(cxx_constexpr_string_builtins) for detection of
> the C-string intrinsics for constexpr support in std::char_traits. Thanks
> to Richard for the intrisic support.
>
> Modified:
>     libcxx/trunk/include/__config
>     libcxx/trunk/include/__string
>
>
Hans --

This should be merged to the 4.0 branch.
Thanks!

-- Marshall
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