Some new packages added in the last month: - python-pytorch - Python neural networks - R - Env for statistical computing - dav2d - AV2 decoder - abiword - Word processor - zoitechat - GTK3 IRC client - sdl3-mixer - SDL3 audio mixer - uutils-findutils / diffutils / sed - Rust GNU tool rewrites

MSYS2 now ships GCC 16 with native Thread Local Storage (TLS) enabled, replacing the old emulated variant (emutls). Some CPython micro benchmarks run 3x faster as a result. Full details: www. msys2.org/news/#2026-05-11-native-thread-local-storage-tls-with-gcc-16

GCC 16.1 is out and in our repos. See gcc.gnu.org/gcc-16/chang... for changes, and gcc.gnu.org/gcc-16/porti... for porting guidelines.

Some new applications added in the last month: - stellarium - planetarium application - gitu - TUI git client inspired by Magit - autohotkey - Windows automation scripting - harper - grammar checker with LSP support - esbuild - JavaScript bundler - pinact - pin GitHub Actions to specific versions

New mingw-w64 v14 is out: www.mingw-w64.org/changelog/#v...

We've upgraded to LLVM/Clang 22. See releases.llvm.org/22.1.0/tools... and releases.llvm.org/22.1.0/docs/... for the release notes

Good news: Thanks to the 'Git for Windows' team, we now have native Git packages in our repository, which should provide a similar experience to the official Git builds. Less battle tested and integrated, but please give it a try and let us know of any issues. www.msys2.org/news/#2026-0...

More deprecations: MINGW64, which got replaced by UCRT64 as our default env in 2022, is now deprecated. We'll not add any new packages for it, and will slowly start removing packages here and there. www.msys2.org/news/#2026-0...

MSYS2 - News

Important events happening.

msys2.org

Some deprecations: We no longer support Windows 8.1. It's EOL for 3 years now, and with Firefox dropping support too, now is a good time to say farewell. Things will not stop immediately, but no guarantees.

Haven't posted in while, so some old news: Right after updating to Python 3.13 we updated to 3.14 in January, and it was the smoothest update yet. We also made pip more strict, to not allow installing outside of a venv, to avoid pip messing with pacman managed files. www.msys2.org/news/#2026-0...

MSYS2 - News

Important events happening.

msys2.org

We have updated to Python 3.13, see www.msys2.org/news/#2026-0... for more details

To mix things up, here are the Python build backends used

I know it's getting boring, but here are the 2025 build system stats

Martin Storsjö at WineConf 2025 about the history and development of the llvm-mingw toolchain (github.com/mstorsjo/llv...), which is the basis for the CLANG64/CLANGARM64 environments in MSYS2. The slides are linked in the video description. www.youtube.com/watch?v=NpxO...

WineConf 2025 - llvm-mingw: How to QA a toolchain on a zero budget – Martin Storsjö

YouTube video by WineHQ

youtube.com

We've upgraded to LLVM/Clang 21. See releases.llvm.org/21.1.0/tools... and releases.llvm.org/21.1.0/docs/... for the release notes

Some new packages (3/3): We have updated to fish v4. fish is our first cygwin package in the repo that is written in rust (!!). fishshell.com

Some new packages (2/3): We have updated to ffmpeg 8.0 with the new vulkan decoders/filters enabled. ffmpeg.org/index.html#n...

Some new packages (1/3): mGBA (Game Boy Advance emulator) mgba.io

There was a lightning talk (in German) about MSYS2 at the Grazer Linuxtage #glt25: media.ccc.de/v/glt25-491-...

Oh, and I forgot to post: We replaced the "x86_64-pc-msys" triplet with "x86_64-pc-cygwin". For more details, see the MSYS2 news entry: www.msys2.org/news/#2025-0...

Some notable additions in the last few weeks (2/2): • libfido2 (FIDO2 client library) • squashfs-tools (work with Squashfs filesystems) • samply (Command-line sampling profiler) • libmem (Advanced Game Hacking Library) • accesskit-c (Accessibility backend for GTK4)

Some notable additions in the last few weeks (1/2): • cygwin curl gained http3 support • dxvk (Vulkan-based D3D shim) • koboldcpp (llama.cpp based KoboldAI UI) • SBCL (Common Lisp implementation) • zlib-ng (high-perf zlib replacement)

GCC 15.1 is out and in our repos. See gcc.gnu.org/gcc-15/chang... for changes, and gcc.gnu.org/gcc-15/porti... for porting guidelines.

Getting ready for GCC 15 next week 😊

With us moving to the new hosted ARM64 runners, a look back at our self-hosted ARM64 runner journey: www.msys2.org/news/#2025-0...

Native Windows ARM64 runners are now available on GitHub Actions. Just use "runs-on: windows-11-arm" and the setup-msys2 action with "msystem: CLANGARM64" to start building/testing. >90% of MSYS2 packages are available for ARM64, so everything should be good to go.

We've upgraded to LLVM/Clang 20. See releases.llvm.org/20.1.0/tools... and releases.llvm.org/20.1.0/docs/... for the release notes

We are moving our MSYS environment closer to Cygwin, see www.msys2.org/news/#2025-0... for details

There will be a short server maintenance tomorrow 🤞 www.msys2.org/news/#2025-0...

It's December, so it's time for our annual build system battle!