The Ubuntu 26.04 Rust sudo is not compatible with standard sudo

Re:The Ubuntu 26.04 Rust sudo is not compatible with standar... by ahartmetz on Friday November 06, 2026 @05:39PM (#50399456)

LLVM was supposed to be a virtual machine initially, hence the (original) name: Low-level virtual machine. The direction that it took, and especially the development of Clang: that was at least partially because of GCC's intentional anti-modularity.

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Re:The Ubuntu 26.04 Rust sudo is not compatible with standar... by jcranmer on Friday November 06, 2026 @07:27PM (#50400379)

LLVM was never meant to be a virtual machine, which is the reason why its name was ultimately changed. (It's closer to an instantiation of the C abstract machine, which is where the "virtual machine" came from.)

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Re:The Ubuntu 26.04 Rust sudo is not compatible with standar... by ahartmetz on Saturday November 07, 2026 @04:42AM (#50403079)

AFAIK, being a flexible JIT compiler (for C-like languages, not Java) was a large part of the idea. The pivot to static compilation only happened "accidentally" in the first few years until the by then pretty broken JIT part was officially removed. Correct me if I'm wrong.

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Re:The Ubuntu 26.04 Rust sudo is not compatible with standar... by jcranmer on Saturday November 07, 2026 @03:25PM (#50407733)

You're wrong. See e.g. https://llvm.org/pubs/2002-12-LattnerMSThesis.pdf, the original thesis proposing LLVM.

LLVM was always trying to pitch itself as a whole-lifetime optimization system. In practice, this meant focusing on LTO and PGO compilation modes. The idea of runtime or idle-time optimization were always kind of a next-todo step rather than anything actually implemented.

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