[Bug target/113763] [14 Regression] build fails with clang++ host compiler because aarch64.cc uses C++14 constexpr.

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113763

--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Jon, what about Iain's question whether it isn't a bug we use constexpr on the
ctor even in C++11 mode?
Do we treat such papers as DRs on the library side?