v7unix
wefx
v7unix | wefx | |
---|---|---|
5 | 4 | |
78 | 28 | |
- | - | |
2.7 | 4.9 | |
almost 3 years ago | 4 months ago | |
C | C | |
- | GNU General Public License v3.0 or later |
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v7unix
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Realist thing I’ve ever seen
This is the source for grep. It's again only 1 file, and tiny. Only uses simple calls, etc. https://github.com/v7unix/v7unix/blob/master/v7/usr/src/cmd/grep.c
- Do you use a linter?
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Implementing Cosine in C from Scratch
This takes me back in time, to c. 1982 when I got curious about how computers calculated trig functions. Luckily I was using one of the first OSS systems (modulo AT&T lawyers): Unix V7. So I pulled up the source and took a look. You can still see it here: https://github.com/v7unix/v7unix/blob/master/v7/usr/src/libm...
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There Is No 'Printf'
It's what historic Unix did: https://github.com/v7unix/v7unix/blob/master/v7/usr/src/libc...
Why it did that? I'm not sure, but at the time C did not have 'void' functions: every function returned a value. They probably wanted to make the behavior of the stdlib functions deterministic, even if the return value was useless and undocumented.
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what does (void*) -1 mean?
See the V7 Unix source for sbrk here.
wefx
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Cheerp 3.0: The most advanced C++ compiler for the Web now permissively licensed
I'm particularly curious on what parts cheerp adds to their clang+llvm base. Presumably it's something like the C standard target library for WASM/JS?
For reference, here's examples of what you could do with the baseline clang with wasm (but not JS?) [1] [2] [3], referenced from a similar thread on HN.
[1] https://github.com/ern0/howto-wasm-minimal
[2] https://github.com/robrohan/wefx
[3] https://github.com/PetterS/clang-wasm
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The Tools I Use to Write Books (2018)
I've used a similar pipeline to create "books for code and infrastructure". A/k/a coding in a somewhat literate programming style. Similar to what is described here:
gemini://gemini.robrohan.com/2022-04-23-narrative-programming.md
With output that looks similar to this: https://github.com/robrohan/wefx/blob/main/docs/manual.pdf
Using a github action like this: https://github.com/robrohan/wefx/blob/main/.github/workflows...
(most of the code borrowed from those projects)
You can do it with just plain markdown files and use directories for chapters / organization if you're just going for prose.
I've thought about using the process to try to make open textbooks where you can mix and match chapters, but I don't have any experience in that field.
Anyway, can confirm, it's an incredibly useful process.
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Show HN: How to compile C/C++ for WASM, pure Clang, no libs, no framework
Not trying to steal your thunder, but here is another nostdlib clang -> wasm example with malloc, a few math functions, rand, and writing to a canvas doing animation.
=> https://github.com/robrohan/wefx
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Implementing Cosine in C from Scratch
I haven’t seen this version mentioned in the thread - if you don’t need a lot of precision, here is a simple 4 line version[1] and here’s how it works[2].
Not sure who initially came up with it.
[1] https://github.com/robrohan/wefx/blob/1a918cc2d5ad87402a3830...
[2] https://www.desmos.com/calculator/lo7cf60mjz
What are some alternatives?
pure-data - Pure Data - a free real-time computer music system
musl - unofficial musl mirror git://git.musl-libc.org/musl
chip8-book - An introduction to Chip-8 emulation using Rust
vectrig - Vectorized approximate trigonometry library optimized for GCC
cib - clang running in browser (wasm)
scratch-www - Standalone web client for Scratch
clang-wasm - How to build webassembly files with nothing other than standard Clang/llvm.
supercollider - An audio server, programming language, and IDE for sound synthesis and algorithmic composition.
wasm-fizzbuzz - WebAssembly from Scratch: From FizzBuzz to DooM.
systemd - The systemd System and Service Manager