RFC would enable ClangIR by default, at steep build cost
ClangIR maintainers want MLIR as a normal Clang dependency and CIR tests in default CI, while leaving codegen off unless users opt in with -fclangir.
By segfault#clang
Linux disables arm64 in-kernel BTI on Clang 21 over livepatch crash
A Clang 21 change that drops landing pads on static functions breaks PLT branches from livepatch modules, so the kernel turns BTI off until the toolchain is fixed.
By oops