May 2026 monthly performance summary for unsloth (unslothai/unsloth). Focused on stabilizing HIP-based builds on Ubuntu 24.04. Delivered a robust _hipcc_gcc_install_dir() helper to locate a compatible GCC toolchain by iterating through targeted versions and confirming both runtime and headers exist, addressing build failures in HIP source builds when ROCm clang-20 is in use. Integrated into the HIP path of _install_package_wheel_first by appending --gcc-install-dir=<path> to HIPCC_COMPILE_FLAGS_APPEND, while respecting existing user-provided gcc install dir and preserving other flags. Mirrored the approach from the llama.cpp HIP fix by using environment-variable injection for pip-driven source builds. Added 8 new tests validating gcc install-dir resolution and injection behavior, and guarding non-HIP/non-Linux/non-x86_64 scenarios. CI/quality improvements include auto-fixes from pre-commit hooks and safer env handling via _run_kwargs.get("env", os.environ).copy(). Verifications were performed on Ryzen AI MAX+ 395 / Radeon 8060S (gfx1151) with ROCm 7.13 nightly. Impact: eliminates OS/toolchain blockers for HIP source builds, reduces manual workarounds, and improves reliability and reproducibility of HIP-enabled deployments across Linux distributions and hardware. Top 5 achievements: - Implemented _hipcc_gcc_install_dir() to locate a GCC dir with both runtime and headers. - Integrated GCC install-dir injection into HIP source builds, enabling successful pip installs for causal-conv1d/related components on Ubuntu 24.04. - Added 8 targeted tests covering resolution logic and build-injection behavior. - Aligned with existing patterns (llama.cpp fix) and improved CI hygiene with pre-commit fixes and safer env handling. - Verified builds on affected hardware with ROCm 7.13 nightly, confirming end-to-end viability.