[Bug libstdc++/77801] std::experimental::gcd std::experimental::lcd use non-constexpr std::abs

[ma30002000 at yahoo dot de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77801

--- Comment #3 from Matthias Schneider <ma30002000 at yahoo dot de> ---
Isn't it also obvious that calling a non-constexpr function from a constexpr
function will not work when actually using it as a constexpr?