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#clang

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Public
deadprogram

Both of my talks from @fosdem last weekend are now available online.

"Return To Go Without Wires" about using Go/TinyGo to make your own AirTags without any Apple hardware:

cuddly.tube/w/p/2H3BJMkJZEJRUS

"Seeing Eye to Eye: Computer Vision using wasmVision" in the first ever WebAssembly dev room at FOSDEM:

video.fosdem.org/2025/k4601/fo

PeerTubeGo Devroom @ FOSDEM 2025By Go Devroom @ FOSDEM
#fosdem#fosdem2025#golang
Public
Joel K. Pettersson

#clang 19 is weird. After upgrading, I found my audio software produced the wrong noises. The reason turns out to be, x86-64 clang 19 with -ffast-math treats 64-bit int-returning lrint()/lrintf() as 32-bit (using instructions that clip the rounded float values to the signed 32-bit int range) sometimes -- whenever the value is assigned to a 32-bit int/uint variable and the full 64-bit value isn't used. No modulo/wrapping 32-bit.

Using llrint()/llrintf() works as expected, so that's a simple fix.

Public
gyptazy

Just a few days ago, I lunched my new relay service for the #Fediverse and I'm really happy to see that there're already many ones connected to - more than 50 instances in just a few days!

But what makes me even really happy is to see, that my service [2] also gets linked in the release notes of #snac [1] / #snac2 - and I can recommend the usage of relay services (it doesn't matter which one!) to everyone. It provides more content from connected instances to you, but also brings your posts - from your local instance - up to other ones within the federated network where it can get much easier distributed around other instances.

#snac is the perfect way to host an own fediverse instance. Using the #ActivityPub protocol allows you to connect to all other instances. With the integrated #Mastodon API, you can also use most of your usual clients or web clients. Snac is light, fast, does not require any database and follows the KISS way - which the most of us BSD people are living. With relay services, it's the perfect match for singe-user instances and @grunfink is always open for ideas and to help! It does not always need to be #Mastodon, #GoToSocial etc!

And if you're using any other software, you may still benefit by using relay services. And if you're still looking for a guide, howto setup snac2 on #FreeBSD, my howto [3] might help you out.

[1]: codeberg.org/grunfink/snac2
[2]: fedi-relay.gyptazy.com
[3]: gyptazy.com/install-snac2-on-f

#community#opensource#development
Public
Joxean Koret (@matalaz)

Does anybody know how to prevent #clang from issuing calls to libc functions like `memset` in this case when compiling C programs? I have tried I don't know how many command line arguments to try to disable it but none worked at all.

Here you have an example program in #godbolt: godbolt.org/z/jheYoPWzj

These are the command line arguments I've tried to disable it:

-ffreestanding -disable-simplify-libcalls -fno-builtin -nostdinc -nostdlib -fno-builtin-memset -nostdlib++ -nostdinc++

Any idea?

godbolt.orgCompiler Explorer - C (armv7-a clang 16.0.0)typedef unsigned long long size_t; extern void do_stuff(unsigned char *, size_t); int main() { { const size_t stuff_len = 65; unsigned char stuff[stuff_len] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF }; do_stuff(stuff, stuff_len); } }
Public
Zeiros Lion

Brain is pretty cooked after all the shit I had to deal with yesterday and the emotional fuckery that followed, but I managed to venture into the realm of clangery with this guy. I'm calling him "Red Eye" for now, for obvious reasons. Sometimes I'm not the most creative guy hehe.

A male-presenting humanoid robot. His head is the only part of him shown beneath the clothes. It is a ruddy, rusty color, round on top with a vaguely skull-like profile, especially with exposed teeth and hollowed out sides of the jaw. It only has one large red eye, framed with a raised profile around it and a ridge raising atop the top of his head. The sides of his head are round plates with antennae rising from them. His outfit is a smart blue dress shirt and gray slacks, with a red tie snugly between his pectorals. He wears a pair of suspenders with a strap that connects the suspenders beneath his chest, giving it even more of a profile. He also has a pair of gloves on, one of which he's tugging tight onto his hand with the other hand. He looks to the viewer with that single eye, as if he's about to fight you.
#Robot#Male#Muscle
Public
puppy

Looking for programming work, available in February, need $15k+/mo.

Experience/knowledge:

- Rust (4yr)
- C (>15yr)
- Python (>10yr)
- Ruby (>15yr)
- POSIX standard
- build/release tools
- automation
- continuous integration/release
- optimization

#rustlang#ruby#rubylang
Public
andie :oh_no_bubble:

First Plan 9 C program compiled and ran! This is going to be a fun weekend and a fun year in general! :akko_excited: Once I rtfm for `2c` and used the x86_64 (`6c` and `6l`) for compiling and linking it all worked.

Really interesting that we return strings instead of integers for errors and final return status (null string is success). Intuitive! #9front #clang

Shows an `acme` editor and a `term` window in Plan 9. The editor has a simple "hello world" program in C. The terminal, to the left of the editor, shows the program output: "Henlo, world!" "The answer is: 42"
Public *
mgorny-nyan (he) :autism:🙀🚂🐧

Some recent #LLVM goodies in #Gentoo:

1. Well, I've said that already but all packages are now in llvm-*/, so they're easier to find.
2. I've added llvm-runtimes/offload, which restores the offloading functions of #OpenMP (available in 19.1.6+).
3. I've added llvm-core/mlir, now that it provides a proper dylib to link to (available in the most recent 20.x snapshot, no plans to backport to 19.x).
4. I've started working on #Flang too, but no promises. At the very least, I'd like to make it support #MLIR dylib upstream.
5. I've sent patches for standalone build support in #ClangIR, so hopefully it'll be ready for integration when it lands in mainstream.
6. I've sent a new llvm-r2 eclass for review, now with much cleaner support for cross-compilation scenarios. public-inbox.gentoo.org/gentoo
7. I'm also slowly working on improving cross-compilation support for LLVM packages themselves, but no ETA on this. At the very least, I'd like to remove the necessity of building another complete copy of LLVM+Clang for CBUILD to compile #Clang.

public-inbox.gentoo.org[gentoo-dev] [PATCH 00/11] llvm-r2.eclass, to unmess pkg_setup and fix cross
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