I propose to enable -ftrivial-auto-var-init for all libraries and utilities in userland by default (under gcc and clang), and specifically to zero-initialize local variables in release builds and to nonzero-initialize them in current builds.
See https://mail-index.netbsd.org/tech-kern/2026/07/20/msg031158.html for background. If there's any userland-specific considerations to discuss, we can discuss in this thread here. Thoughts?
