[libcxx-commits] [libcxx] [libc++][math] Add `constexpr` to `copysign` functions (PR #216285)

[Nikolas Klauser via libcxx-commits]

philnik777 wrote:

Also, I don't really understand why you're trying so hard to make it work in the library instead of just updating Clang. I'm pretty sure it's not that hard if the builtin is already constexpr.

https://github.com/llvm/llvm-project/pull/216285