[cfe-dev] clang fails to compile gcc 4.8's <unordered_map>

Chandler Carruth chandlerc at google.com
Thu May 31 02:18:56 PDT 2012

On Thu, May 31, 2012 at 2:15 AM, Sebastian Redl <
sebastian.redl at getdesigned.at> wrote:

> On 31.05.2012 05:59, Nathan Ridge wrote:
> > The problem is that GCC uses the following alias template as class scope:
> >
> > template<typename _Pair>
> > using __is_convertible = std::is_convertible<_Pair, value_type>;
> >
> > but __is_convertible, I am guessing, is a compiler intrinsic in clang.
> >
> > Is either gcc or clang doing something wrong, or is it just a clash of
> implementations?
> It's a clash of implementations. We've had this before, but not with a
> new GCC version - only with old GCC versions.
> > What can be done to resolve this?
> >
> Since GCC 4.8 is not yet released, and Clang versions with the
> __is_convertible intrinsic are, the best solution would be to politely
> ask the libstdc++ maintainers to change this name.

Please let us know if you do / what the PR is for it? We're likely to hit
this as well, and will want to track the progress of getting it resolved.
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