# llama.cpp b11550 adjusts s390x builds for unsupported compilers

> The release disables the IBM z17 target on s390x when a compiler does not support it. It also provides downloads for several operating systems and hardware configurations.

Oossa · 2026-10-10 · https://oossa.com/en/llama-cpp-b11550-adjusts-s390x-builds-for-unsupported-compilers

ggml-org has released llama.cpp b11550, with a build-system change for s390x, IBM’s 64-bit Linux architecture. The release disables the z17 target when the compiler in use does not support it.

The release page also lists prebuilt downloads for macOS, iOS and several Ubuntu configurations, including CPU, Vulkan and CUDA 12.8 versions. It does not describe other changes or give performance results.

## The facts

- The release’s listed change is “cmake(s390x): disable z17 target for unsupported compilers.”
- Downloads include Ubuntu s390x CPU, Ubuntu x64 CUDA 12.8, and macOS Apple Silicon builds.

## Why it matters

For people building llama.cpp on s390x, the change may avoid selecting a z17 target their compiler cannot handle; the release notes do not specify which compilers are affected.

## Sources & references

1. [ggml-org/llama.cpp b11550](https://github.com/ggml-org/llama.cpp/releases/tag/b11550) – llama.cpp, 2026-10-10

Last updated: 2026-10-10