[Bug libstdc++/82749] piecewise_linear_distribution::densities() non conformity

[redi at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82749

--- Comment #9 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Tomasz Kamiński from comment #7)
> > For the unstable ABI (#if _GLIBCXX_INLINE_VERSION) we could just fix it 
> > properly.
> 
> The std::float16, std::float32, std::float64 are not ABI stable

And it's undefined to use them with <random> in C++11-C++23, and impl-defined
in C++26 (since P4037R1).