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anthropics
claudes-c-compiler
Rust2026–2026
anthropics / claudes-c-compiler

claudes-c-compiler

Claude Opus 4.6 wrote a dependency-free C compiler in Rust, with backends targeting x86 (64- and 32-bit), ARM, and RISC-V, capable of compiling a booting Linux kernel.

27Distinct people
30Mentions
1Explicit recommenders
2.8KGitHub stars
REPOSITORY AT A GLANCE

What to know before exploring

What it is

Claude Opus 4.6 wrote a dependency-free C compiler in Rust, with backends targeting x86 (64- and 32-bit), ARM, and RISC-V, capable of compiling a booting Linux kernel.

GitHub

Where it is used

No documented product use was verified in the last source check.

What people are saying

Between all of the "banter" (which is from more than just the anti-AI folks) you may not have caught I was one of the first 10 comments on that very issue 3 days ago…

zamadatix used a recommendation phrase. One indexed comment matches. This is a phrase match, not a verdict.

No classified warning is attached to this page. Read the discussions before treating silence as approval.

Also in these discussions

Mentioned in the same Hacker News threads. That is not proof they are substitutes.

This week on Hacker News

Nov 7–Nov 14 UTC · Direct repository links and separately labeled related project stories. Indexed through 11/14/2026, 5:04:57 PM UTC.

No direct repository links were found in the indexed HN discussions over the past seven days. Older discussions are available below.

Mentions over time

HN mentions by month30 dated mentions

Observed mentions: 2026-02-05 19:23:04 UTC to 2026-09-19 11:28:56 UTC.

051015202026-02-01 00:00:00 UTC to 2026-03-01 00:00:00 UTC (exclusive): 21 mentions; 3 submissions, 18 commentsFeb 20262026-03-01 00:00:00 UTC to 2026-04-01 00:00:00 UTC (exclusive): 2 mentions; 0 submissions, 2 comments2026-04-01 00:00:00 UTC to 2026-05-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2026-05-01 00:00:00 UTC to 2026-06-01 00:00:00 UTC (exclusive): 1 mentions; 0 submissions, 1 commentsMay 20262026-06-01 00:00:00 UTC to 2026-07-01 00:00:00 UTC (exclusive): 3 mentions; 0 submissions, 3 comments2026-07-01 00:00:00 UTC to 2026-08-01 00:00:00 UTC (exclusive): 2 mentions; 0 submissions, 2 comments2026-08-01 00:00:00 UTC to 2026-09-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2026-09-01 00:00:00 UTC to 2026-10-01 00:00:00 UTC (exclusive): 1 mentions; 0 submissions, 1 commentsSep 2026

Counts come from the repository’s dated source evidence. Index cutoff: 2026-11-02 08:16:59 UTC.

View mention counts and date ranges
UTC ranges include their start and exclude their end. Select a period to filter the source evidence.
PeriodStart (UTC)End (exclusive, UTC)MentionsSubmissionsComments
Feb 20262026-02-01 00:00:00 UTC2026-03-01 00:00:00 UTC21318
Mar 20262026-03-01 00:00:00 UTC2026-04-01 00:00:00 UTC202
Apr 20262026-04-01 00:00:00 UTC2026-05-01 00:00:00 UTC000
May 20262026-05-01 00:00:00 UTC2026-06-01 00:00:00 UTC101
Jun 20262026-06-01 00:00:00 UTC2026-07-01 00:00:00 UTC303
Jul 20262026-07-01 00:00:00 UTC2026-08-01 00:00:00 UTC202
Aug 20262026-08-01 00:00:00 UTC2026-09-01 00:00:00 UTC000
Sep 20262026-09-01 00:00:00 UTC2026-10-01 00:00:00 UTC101

What Hacker News says

30 sources
> As of writing, Claude Code CLI only has around 9100 open Github issues, with small unresolved issues like it completely freezing for the last 6+ months or a screen flickering issue open for more than a year. But surely those fully autonomous coding loops will solve all those 9,100+ open issues on GitHub? Why haven't they? What happened to Claude's C Compiler [0], or that browser "built from scratch" by Cursor? [1] Why aren't the agents maintaining it if they are supposed to be cheaper than humans? > But why do they have us by the balls? Dario and Boris have us convinced that “coding is solved” with their loops. But microwaves didn’t solve cooking. They have you by the balls if you allow them to, if you continue to listen to their bullshit. Both of them are essentially salesmen at this point. They don't care if they are wrong and will se
Read the rest
ll Claude to whoever is thinking of planning the next mass layoff. Their definition of "AGI" is different to yours. The correct answer to all of this pricing nonsense that Anthropic and others are doing is local open weight models that you run on your own machine. They know this and powerful local models undercut their entire business model if hosted by others or if a smaller local model matches the performance of larger ones. [1] https://github.com/anthropics/claudes-c-compiler [0] https://github.com/wilsonzlin/fastrender
In Anthropic's Method to Losing Goodwill in a Few Easy Steps
Part of the problem is that of human alienation. By excluding humans in the construction process, it has taken away any skin-in-the-game for humans. So, there could be a point where some bugs become unresolvable because LLMs dont have an adequate causal model and fixes by trial-and-error wont work in cases where root-causes are not properly addressed - and the project gets abandoned as a result. Witness the C compiler in rust [1], what happened to that after the initial press releases ? [1] https://github.com/anthropics/claudes-c-compiler
In Port React Compiler to Rust
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
In Warn about PyPy being unmaintained
> 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
In Agentic Engineering Patterns
Didn't see people mention this in the initial discussion, but despite not having access to internet, the agents actually had access to the source code of GNU binutils (has assembler, linker and readelf), and many C compilers (SDCC, PCC, chibicc, cproc, etc) in their working directory [1]. These are supposed to test compilation, but there's no way to prove that Claude didn't get crucial info from these projects. I also found the compiler to have uncanny resemblance with chibicc. With 30-ish edge cases[2] yielding the same behavior, it's hard to believe there's no influence of chibicc in its algorithms. [1] https://github.com/anthropics/claudes-c-compiler/blob/6f1b99... [2] https://github.com/anthropics/claudes-c-compiler/issues/232
In OK, so Anthropic's AI built a C compiler. That don't impress me much

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