Hermetic Build

Open infrastructure providing toolchains, rules, build tools and SDKs, making builds hermetic, lightweight, and remote-execution ready.

[Hermetic Build @hermeticbuild]

This is a major milestones for windows !

[Corentin Kérisit @corentinanjuna]

Codex CLI can now be built for Windows MSVC runtime fully hermetically in remote executors.

This was the final validation pass for the MSVC support in hermetic-llvm project.

Powered by @hermeticbuild and @buildbuddy

Invocation URL: https://t.co/uqXjeSc3Zu

[Hermetic Build @hermeticbuild]

@corentinanjuna @buildbuddy This has been a serious ask for months !

[Hermetic Build @hermeticbuild]

LLVM 23 support is out. It came with a bit of bloat that we’ll try to help solving back in LLVM: goal is to stay under the 40mb bar all the time.

[Corentin Kérisit @corentinanjuna]

LLVM 23.1.0 support in @hermeticbuild hermetic-llvm toolchain is out.

Reminder that the prebuilts we ship are:
- 40mb in TOTAL
- .tar.zst
- PGO/FDO'ed on 100% of the cross-compiling matrix
- LTO'ed
- 15-20% faster than official clang etc.

https://t.co/KhNJw5DRrA

[Hermetic Build @hermeticbuild]

In other terms: @hermeticbuild LLVM distribution is the fastest by far. Benchmarks incoming.

[Corentin Kérisit @corentinanjuna]

LLVM cross-host FDO on hermetic-llvm is insanely cool:

We instrument Clang on Linux on compile workloads for EVERY target we support, merge all profiles, then use the aggregate to optimize all final Clang builds.

One profile captures hot paths across the entire target matrix.

[本味纳凉地（original-cooling-space） @originalcspace]

I followed the official guide to set up BuildBuddy—which you recommended yesterday—this afternoon. The build speed is dozens of times faster, and I haven't encountered any issues like processes abruptly terminating in my wsl2 environment. Thanks for your help!

[Hermetic Build @hermeticbuild]

NCCL support added to the hermetic @bazelbuild cuda-toolkit module.

We generate and distribute a custom NCCL redist JSON since it did not exist. It guarantees NCCL compatibility with selected CUDA version.

https://t.co/eKgizYvL71

[Hermetic Build @hermeticbuild]

Hermetic CUDA toolkit gaining mainstream usage is pretty cool to witness :)

That one ! https://t.co/mnuYWXrSwm

[Hermetic Build @hermeticbuild]

https://t.co/A6rypQ5Rgj

[Hermetic Build @hermeticbuild]

Microsoft Visual C++ runtimes DDLs are now available as @bazelbuild targets in @hermeticbuild

This marks the last round of necessary windows Bazel targets necessary to provide fully hermetic Windows MSVC programs. And a bright future for large scale builds. cc @windowsdev @msdev

[Hermetic Build @hermeticbuild]

@jonathangrahl Did you take a look at actiond from https://t.co/naYoPZbbmA ?

[Hermetic Build @hermeticbuild]

This will be huge...

[Corentin Kérisit @corentinanjuna]

100% hermetic LLVM clang-cl based Windows MSVC builds coming soon in @hermeticbuild.

Put simple, this means cross remote Windows builds from Linux executors with distributed ThinLTO for free at the disposal of anyone doing extremely large Windows programs. cc @msdev @windowsdev

[Hermetic Build @hermeticbuild]

Using @hermeticbuild rulesets and toolchains.

[Steeve Morin @steeve]

So @OpenAI started building Codex with @bazelbuild

The results speak for themselves