Before anything, let me get certain concerns out of the way, right away

Mandatory disclosure: Just to prove that this is not some yet-another-LLM cracked-pottery, I did similar work for SciPy and hand-translated ARPACK, PROPACK, QUADPACK, ODEPACK and bunch of other packs (https://github.com/scipy/scipy/issues/18566 for the complete list, ~85K SLOC) when LLMs were not good for this type of work. Most of the translations are already released in previous SciPy versions so I hope that provides credibility for F77 -> C11 translation work. Now LLMs are slightly better and for LAPACK translation, I used Claude Code as an assistant for certain tasks. End of PSA.

-------- We now return to normal programming.

This is a C11 translation of the venerable Fortran77 linear algebra library, LAPACK. In case you can't afford or don't want Fortran dependency, this project might help. It works exclusively with a CBLAS interface to avoid the symbol naming bonanza that affects every other vendor (is it uppercase or not, with/out trailing underscore, ...). A bit controversially, translation is 0-indexed inside out, except the error codes. unfortunately `info = 0` encodes success so we can't do much about that.

Current test coverage; LAPACK own test suite (450K parametrized tests also mapped to C), NumPy test suite and SciPy test suite all pass. At least in the most common algorithms it is sound. For less covered ones, still there might be bugs and hence I marked it as alpha for now. But if you find any, write up an issue in the repo.

Also this makes it much easier to compile OpenBLAS and LAPACK with for your own machine or wherever it is meant to be running with architecture optimizations enabled and it works with a leaner binary size.

If you also want a drop-in replacement, there is also a fortran-shim supplied that will convert the wrappers to be seen as 1-indexed (that's how I tested NumPy/SciPy) with a bit of performance hit.

You can also name mangle the symbols to your liking with prefix and suffixes if you don't like the default. ILP64 is also supported and if you try to link with ILP64 CBLAS, it either complains if it was accidentally linked or handles things for you if you provide the flag.

The doxygen version of the documentation on Netlib, always rubbed me the wrong way for some reason; hence I tried my spin on it. It's here: https://ilayn.github.io/semicolon-lapack/

One particular detail I wanted to see often, was to see all four flavors at the same time; now they are grouped like this https://ilayn.github.io/semicolon-lapack/api/linear-systems/... If I failed please let me know, I'm still exploring the details. The default fonts, as an example, definitely need some love.

A couple of points as a futile attempt to prevent unhelpful discussions;

- There is nothing wrong with Fortran. If you like it keep using it. I don't, though big fan of Fortran77 for its era, not so much what is called the modern one. - This work has nothing to do with Fortran. It tries to serve a particular audience that use exclusively a C toolchain and does not want inter-language issues. - This work hopes to attract more people for optimizing the C code for common benefit.

Some more reasoning is given in the documentation.

All feedback/criticism welcome.

Show HN: LAPACK without Fortran77; a C11 translation

Legibility Is Ruining You

Show HN: Watch an AI-agent utopian commune fall apart

How come LinkedIn uses 3.5 GB of RAM?

Nvim-treesitter (13K+ Stars) is Archived

Memori Labs Launches OpenClaw Plugin, Bringing Persistent AI Memory to Agents

Zprof – Zero-overhead allocator profiler for Zig

Automatic removal of junk instructions through state tracking (2018)

Ask HN: If browsers are sandboxed, how can an Edge extension view local apps?

Show HN: Using bots to connect to 100ms.live video room for testing

Demand for autism care is soaring

Sens Ask Gabbard to Tell Americans That VPN Use Subjects Them to Surveillance

Positioning, Leverage, and Judgment

Advice to Young People, the Lies I Tell Myself (2024)

As drought deepens, Yuma area embraces new technology to save water

Former US Air Force master sergeant pleads guilty to defrauding military by $37M

Why samurai are cooler than klingons

Show HN: Self-Host Excalidraw with Collaboration and Storage

X Asks Court to Dismiss Music Piracy Lawsuit After Supreme Court's Cox Ruling

Mullenweg to Cloudflare: Keep WordPress Out of Your Mouth

Treason? Yes Apple Bows to Kremlin Removes over 190 Major Apps

Banning All Anthropic Employees

German implementation of eIDAS will require an Apple/Google account to function

Hermes Agent: The self-improving open source AI agent Complete Guide for 2026

Why your joints make noise

Why we see clear details: study reveals how the eye makes sharp vision possible

Show HN: Artemis.fyi – Real-time tracker for the Artemis II Moon mission

Ewigkeitsglühbirne (Eternal Light Bulb)

AI can describe human experiences but lacks experience in an actual body: study

Show HN: Chrome extension prototype for cross-tab/frame network interception

Ask HN: Are you running production workloads in Pytorch eager mode?