Today I learnt that gcc can mean 'Google Closure Compiler'. It's a sophisticated compiler, but I suppose its use cases are sufficiently non-overlapping with C compilers to avoid confusion. Surprised me though.
miniblog.
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Anthropic used Claude to write a C compiler in Rust (CCC). I've really enjoyed following the discussion.
The initial post shows how they wrote the harness with GCC as an oracle and a prompt specifying a design using SSA. The author has clear domain expertise.
https://www.anthropic.com/engineering/building-c-compiler
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Co-Authored-By: An old Stack Overflow answer, blindly accepting the compiler's suggestions, and a linter.
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I would have thought that invoking a C compiler would be a solved problem. Looking at Rust's cc crate there's a remarkable long tail of corner cases to fix.
Exotic CPUs, microarchitectures, compiler differences, operating system differences, etc.