[committed v5] libstdc++: Implement C++26 <debugging> features [PR119670]

[Jonathan Wakely]

On Sat, 30 Aug 2025 at 10:44, Iain Sandoe wrote:
> I wonder if the long-term maintenance of this feature would be made easier
> (and a small amount of impl. divergence removed) by adding a
> ` __builtin_debugtrap()` to GCC lowered on a target hook, with a fallback to
> `__builtin_trap()` ?


That might be a simple way to make progress on PR 99299 (and PR 84595).