99 stories tagged c, newest first.
11 points by signa11 | 9 comments
Blog post demonstrating with GCC and Clang assembly output that undefined behavior in C/C++ can cause unexpected effects like falling through into unrelated functions.
10 points by clash | 15 comments
GitHub repository for caffeinate+, a small C command-line utility for macOS that keeps a MacBook awake after the lid is closed.
28 points by surprisetalk | 8 comments
A personal blog post describing 'rainbows', a work-in-progress spec for memory-mapped I/O devices (console, arithmetic, disk, datetime, screen) for the author's 'ok' virtual machine.
118 points by martz | 40 comments
Blog post benchmarking VLC's Gaussian blur filter in C against a C# port via .NET Native AOT, across line-by-line, algorithmically optimized, and AVX2 SIMD versions.
25 points by jstrieb | 0 comments
A 2014 blog post by Leandro Pereira on tia.mat.br about fast techniques for converting integers to strings.
40 points by kiyouta | 8 comments
GitHub repository for an MIT-licensed QEMU/VMware mouse integration driver for Windows NT 3.x, written in C with Docker-based build and ISO installer.
44 points by david2ndaccount | 13 comments
David Priver's blog post describing fun extensions he added to the C preprocessor in his own C2Y compiler/interpreter, such as __print() and __where() debugging macros.
![Screenshot of cr.yp.to: The cryptoint library (2025) [pdf]](https://hn.urlbox.com/shots/renders/2026/10/17/d7252175-f03a-4bd6-9d9e-1f6d618c09c4.jpg)
21 points by akkartik | 0 comments
Daniel J. Bernstein's paper describing cryptoint, a C/C++ library of constant-time integer functions designed to resist compiler optimizations that introduce timing leaks.
6 points by embedding-shape | 2 comments
A blog post by a C programmer arguing that Rust's rapid adoption is dangerous, citing corporate control of the Rust Foundation and social hype.
111 points by dverlaeckt80 | 79 comments
Blog post listing incompatibilities between ISO standard C and C as actually used with gcc/clang and glibc/musl.
207 points by khalidkhair | 77 comments
GitHub repository for Janas, a pure C inference engine that runs LLMs larger than RAM by streaming MoE experts from SSD, on CPU or GPU.
65 points by Bluestein | 30 comments
Project page for kcgi, a minimal, secure open-source CGI and FastCGI library for writing C/C++ web applications, with a Hello World example.
678 points by prophittcorey | 303 comments
Corey Prophitt's blog post on building and shipping marketyour.games, a commercial web product written in C and served via CGI in 2026.
36 points by saisrirampur | 1 comments
GitHub repository for clickhouse-c, a minimalist header-only C library for talking to ClickHouse over its native binary protocol in embedded contexts.
69 points by dimonomid | 30 comments
A blog post by Elias Ebner explaining arena allocators as a performant, versatile way to manage memory in C and reduce memory leaks.
81 points by tosh | 17 comments
GitHub repository for APSW, Another Python SQLite Wrapper, a C extension providing a thin Python interface to the SQLite database library.
16 points by epestr | 9 comments
GitHub repository for cbirds, a program that simulates and displays a flock of birds in the terminal.
64 points by signa11 | 82 comments
Blog post explaining why standard C offers no portable way to check for errors in string-to-float conversion functions like strtod, following up on math_errhandling.
127 points by peter_d_sherman | 37 comments
LWN article describing Eurydice, a project that compiles Rust code into readable C for use with verification tools and platforms lacking a Rust compiler.
14 points by boris | 5 comments
A build2 blog post by Boris Kolpackov on the problems with autoconf/CMake-style configuration probing via test compilation and how to fix them.
154 points by xyproto | 161 comments
A blog post by a programmer who learned Rust first, listing surprising details and quirks of C for Rust programmers learning the language.
12 points by birdculture | 3 comments
Blog post describing how to call a C function such as execve without naming it, to bypass a school autograder's allowed-function checks.
17 points by shrub900 | 3 comments
A personal essay arguing that compilers, build systems, and package managers in POSIX-like operating systems fail to share dependency and resource information, missing optimization opportunities.
125 points by mkornaukhov | 30 comments
A 2016 blog post walking through a minimal Linux container implementation in C, covering namespaces, capabilities, mounts and other isolation mechanisms.
58 points by ibobev | 12 comments
Blog post arguing that float arithmetic should be handled by reacting to results (NaN/inf) rather than the preventive checks used for integer overflow in C and Rust.
48 points by ahmetomer | 5 comments
GitHub repository for Photoc, an MIT-licensed set of C command-line tools for photographers covering image compression, EXIF, and photo management.
130 points by AlexeyBrin | 100 comments
Daniel Hooper's blog post explaining a union-based technique for writing type-safe generic data structures in C, illustrated with a linked list.
332 points by fibo | 95 comments
Landing page for DwarfStar 4 (ds4), an MIT-licensed C inference engine for running open-weight LLMs like DeepSeek V4, GLM 5.x and Qwen locally on Mac, CUDA and ROCm.
66 points by ibobev | 7 comments
Playdate developer forum thread sharing advanced C optimization tricks learned while building a full-speed Game Boy emulator for the Playdate.
50 points by hsfzxjy | 12 comments
GitHub repository for npunlock, a tool to write and run custom C kernels on Intel Core Ultra NPUs.
34 points by ingve | 16 comments
A blog post explaining type punning in C and C++, covering which techniques are defined behavior versus undefined behavior and why casts can break under optimization.
317 points by gkfasdfasdf | 85 comments
GitHub release page for jemalloc 5.4.0, covering over 160 commits of refactoring, bug fixes, test coverage improvements, option cleanups, and portability fixes.
392 points by tosh | 111 comments
GitHub repository for bzip3, an LGPL-licensed compression tool described as a better and stronger successor to BZip2.
418 points by swyx | 93 comments
GitHub repository for h3.c by antirez, a native MiniMax H3 model inference engine for Mac computers using Apple Silicon/Metal.
453 points by atan2 | 231 comments
Dominic Szablewski's blog post on making a new Nintendo 64 game in 2026, following his port of a JavaScript game engine to C.
318 points by marcobambini | 152 comments
GitHub repository for waste, a dependency-free embeddable C inference engine that runs the 2.78-trillion-parameter Kimi K3 model by streaming weights from NVMe.
882 points by vforno | 223 comments
GitHub repo for Colibrì, a dependency-free C engine that runs the 744B GLM-5.2 MoE model on a ~25GB-RAM machine by streaming experts from disk.
371 points by Philpax | 82 comments
GitHub repository crustc, containing the entire Rust compiler rustc translated into C source code.
906 points by helterskelter | 197 comments
GitHub repository for πfs, a joke 'data-free' filesystem that stores files as offsets into the digits of pi.
416 points by matt_d | 94 comments
Official IOCCC page for the 2025 29th International Obfuscated C Code Contest, listing the winning entries.
459 points by lycopodiopsida | 598 comments
Personal blog post arguing that nobody can write correct C or C++ because nearly all code triggers undefined behavior, and that the languages are outdated.
495 points by hahahacorn | 226 comments
Engineering at Meta blog post announcing Meta's renewed investment in and commitment to maintaining the open-source jemalloc memory allocator.
347 points by valyala | 72 comments
Blog post describing SectorC, a C compiler written in x86-16 assembly that fits in a 512-byte boot sector and supports a usable subset of C.
421 points by antirez | 135 comments
GitHub repository by antirez for flux2.c, a pure C inference implementation of the FLUX.2 Klein image generation model.
323 points by raggi | 47 comments
Blog post by Frank Denis, libsodium's author, describing a vulnerability found in the libsodium cryptographic library.
331 points by pizlonator | 133 comments
A Fil-C documentation page explaining how memory safety and Linux sandboxing (seccomp) are orthogonal and how Fil-C supports sandboxes.
590 points by damethos | 164 comments
A blog post that tongue-in-cheek implements an even/odd check using 4 billion generated if statements, inspired by a viral TikTok screenshot of beginner code.
356 points by vismit2000 | 62 comments
Matt Godbolt announces the Advent of Compiler Optimisations 2025, a daily blog post and video series in December covering C and C++ compiler optimisations.
556 points by tanelpoder | 80 comments
A web-based explorer for browsing the Linux kernel source tree from GitHub, with a file tree and a data structures view.
529 points by vitalnodo | 467 comments
An article by Nilo Stolte presenting the Zig programming language's appealing features, such as its compiler that compiles C and cross-compiles.
331 points by gudzpoz | 149 comments
A blog post in which the author attempts to read and understand Arthur Whitney's terse C code, such as his small K interpreter.
340 points by transpute | 219 comments
Daniel J. Bernstein's notes on using the memory-safe C/C++ compiler Fil-C, including install scripts, timings, and compatibility observations on Debian 13.
374 points by ashtonjamesd | 183 comments
GitHub repository for Lavandula, a fast, lightweight MIT-licensed web framework written in C for building web applications.
445 points by simonpure | 218 comments
GitHub repository for sj.h, a tiny single-header JSON parsing library written in about 150 lines of C99 by rxi.
556 points by pizlonator | 255 comments
Documentation page describing FUGC, Fil-C's parallel concurrent on-the-fly non-moving Dijkstra garbage collector for memory-safe C/C++.
351 points by mdl_principle | 100 comments
Index page for the 2024 (28th) International Obfuscated C Code Contest, linking to the winning entries.
395 points by todsacerdoti | 162 comments
Daniel Hooper's blog post explaining a technique for writing type-safe generic data structures in C using unions to carry type information.
386 points by gnabgib | 130 comments
Blog post by Falk Hüffner explaining a leap year check for years 0–102499 using a multiply, mask, and compare in about three CPU instructions.
325 points by toxi360 | 181 comments
GitHub repository for a lightweight native Windows todo application written in pure C using the Win32 API, with tray support and MIT license.
513 points by AlexeyBrin | 319 comments
JetBrains blog post announcing that its CLion C and C++ IDE is now free for non-commercial use.
520 points by joexbayer | 102 comments
GitHub repository for RetrOS-32, a 32-bit x86 hobby operating system with graphics, multitasking, networking and a C compiler for i386.
351 points by diginova | 161 comments
GitHub repository containing source code of the earliest known versions of Dennis Ritchie's first C compiler (last1120c and prestruct).
371 points by dvrj101 | 392 comments
A personal blog post by a longtime freelance developer explaining why they moved from Ruby on Rails and Common Lisp back to writing C.
608 points by mustache_kimono | 339 comments
Linux kernel mailing list post by Greg Kroah-Hartman arguing that writing new kernel code and drivers in Rust eliminates common C bug classes, in the Rust kernel policy thread.
361 points by azeemba | 59 comments
A Stack Exchange question on Programming Language Design and Implementation asking how modern compilers decide which variables to place in registers.
328 points by tosh | 169 comments
GitHub repository for bzip3, an LGPL-licensed compression tool described as a better and stronger spiritual successor to BZip2.
942 points by ingve | 108 comments
Intro chapter of an online book that walks through building a small RISC-V operating system from scratch in about 1,000 lines of C.
420 points by ivmoreau | 79 comments
Project homepage for Clay, a single-header C library providing flexbox-style declarative UI auto layout with microsecond performance.
852 points by jart | 311 comments
Justine Tunney's blog post benchmarking Cosmopolitan Libc's mutex implementation against other platforms' mutexes under heavy thread contention.
337 points by doodlesdev | 127 comments
GitHub repository for rawdrawandroid, a project for building Android apps entirely in C and Make without any Java.
359 points by lostmsu | 148 comments
GitHub repository for a Flappy Bird clone for Android 5.1+ written only in C, with an APK under 100 kilobytes.
361 points by todsacerdoti | 186 comments
Blog post by John Nunley announcing Dozer, a Rust compiler written in C, and explaining why he is building it to bootstrap Rust.
329 points by fanf2 | 140 comments
Josh Haberman's blog post on using Clang's musttail attribute for guaranteed tail calls in C to build a protobuf parser exceeding 2GB/s.
488 points by zichy | 123 comments
Dominic Szablewski's blog post about porting his JavaScript game engine Impact to C as high_impact, a small engine for 2D action games.
350 points by wrycoder | 35 comments
Online edition of The Linux Kernel Module Programming Guide, a free book on writing Linux kernel modules, with GitHub and PDF links.
350 points by 201984 | 139 comments
Codeberg repository for dut, a multi-threaded disk usage calculator for Linux written in C as a single source file.
372 points by p1esk | 69 comments
Blog tutorial implementing high-performance CPU matrix multiplication in about 150 lines of C, following the BLIS design and outperforming NumPy/OpenBLAS on a Ryzen 7700.
320 points by sgammon | 111 comments
GitHub release page for Cosmopolitan Libc v3.5.0, a C library and toolchain that builds single binaries running natively on Linux, Mac, Windows, BSDs and BIOS.
360 points by bondant | 200 comments
GitHub repository for datatype99, a C99 library providing algebraic data types and pattern matching via preprocessor metaprogramming.
810 points by tosh | 134 comments
GitHub repository for llm.c, Andrej Karpathy's project for training LLMs like GPT-2 in simple, raw C/CUDA.
386 points by fbrusch | 65 comments
A blog post taking a deep dive into the layers of abstraction behind a modern Hello World program written in C.
360 points by dmalcolm | 125 comments
Red Hat Developer article by David Malcolm describing improvements to the static analyzer (-fanalyzer) in the GCC 14 compiler.
445 points by tripdout | 74 comments
Julia Evans blog post from 2014 explaining how ELF binary executables on Linux are structured, using simple tools on a compiled C hello-world program.
604 points by Tomte | 114 comments
A page from the Everything curl book explaining the --libcurl option, which generates a C program using libcurl that replicates a curl command-line transfer.
532 points by evah | 91 comments
A personal page dissecting xmas.c, Ian Phillipps' 1988 IOCCC-winning obfuscated C program, explaining how the code works.
335 points by D4ckard | 107 comments
GitHub repository for Spray, a small x86_64 Linux debugger for C programs with a simple CLI interface, built by a 17-year-old student.
1100 points by jart | 220 comments
Justine Tunney's announcement of Cosmopolitan libc version 3.0.1, featuring a new linker for building fat binaries that run on multiple OSes and architectures.
446 points by zdw | 333 comments
Chris Wellons describes his personal C coding style as of late 2023, including short primitive type names and the reasoning behind his habits.
454 points by vgel | 142 comments
Blog post by vgel describing the design and architecture of a small C compiler written in about 500 lines of Python.
659 points by anjneymidha | 158 comments
GitHub repository by Andrej Karpathy for llama2.c, a minimal implementation for running Llama 2 model inference in a single file of pure C.