claudes-c-compiler

Strange subthread. I don't see Claude Opus 4.6 changing the tide for PyPy. There is no need to understate AI capabilities for this. "Anthropic released vibe coded C compiler that doesn't work" sounds like https://github.com/anthropics/claudes-c-compiler/issues/1 passed through a game of telephone. The compiler has some wrong defaults that prevent it from straightforwardly building a "Hello, world!" like GCC and Clang. The compiler works: > The 100,000-line compiler can build a bootable Linux 6.9 on x86, ARM, and RISC-V. It can also compile QEMU, FFmpeg, SQlite, postgres, redis, and has a 99% pass rate on most compiler test suites including the GCC torture test suite. It also passes the developer's ultimate litmus test: it can compile and run Doom. https://www.anthropic.com/engineering/building-c-compiler

> At this point though, after Claude C Compiler, Perfect example. You mean the C compiler that literally failed to compile a hello world [0] (which was given in it's readme)? > What do you consider simple issues? Hallucinating APIs for well documented libraries/interfaces, ignoring explicit instructions for how to do things, and making very simple logic errors in 30-100 line scripts. As an example, I asked Claude code to help me with a Roblox game last weekend, and specifically asked it to "create a shop GUI for <X> which scales with the UI, and opens when you press E next to the character". It proceeded to create a GUI with absolute sizings, get stuck on an API hallucination for handling input, and also, when I got it unstuck, it didn't actually work. [0] https://github.com/anthropics/claudes-c-compiler/issues/1