fanquake

Rebased, and put on top of #25861. Please review that PR first.

The non-determinism when building on x86_64 and aarch64 has now been fixed. This required backporting 1 commit to our gcc 10: https://github.com/bitcoin/bitcoin/pull/25391/commits/ca17654f507f2f0ff51f7a2802113c45331a8447 and one change in depends. Returning this to...

Rebased past #27153.

Rebased this on top of #27897. Dropped the commit to backport a patch to GCC 10.

Rebased on #27897. Simplifed / squashed down the changes here. Updated the PR description. The current (non-conceptual) blocker is that Qt for Windows doesn't really work under LTO... See 8031e400af66bf5267201069a7c062cb6a9d02ea.

> I have no idea if this will help, Looks like it's good enough for working Windows builds. Turned the change into a depends patch, and dropped `--allow-multiple-definition`. I'll PR...

> Any idea where in6addr_any is coming from? Seems fine, just curious. I can't remember exactly, but it looks like this is actually no-longer required. Did a new round of...

@mzumsande I'm guessing you switched to using a newer Clang here? Note that our minimum required Clang is also now 15, which would "solve" the original issue, however not the...

PIcked up in #30079.

Lets add #29127, so if we decide to, we can test macOS notarization: https://github.com/bitcoin/bitcoin/issues/15774#issuecomment-1899228781.