April 2026 Monthly Summary for SciPy development: Key features delivered: - AIX build stabilization in SciPy's linalg path by renaming the RAW enumeration to RAW_MODE to avoid conflicts with a pre-existing macro in AIX headers. This change ensures successful cross-compilation and preserves library functionality without altering public APIs. Major bugs fixed: - Resolved a build break on AIX caused by a conflicting RAW macro during compilation of SciPy’s linalg modules. The rename eliminates the macro collision in system headers, enabling the standard build flow to complete. Overall impact and accomplishments: - Achieved reliable AIX CI builds, reducing platform-specific CI failures and enabling more stable cross-platform support for SciPy. - Sped up development and validation cycles by removing a recurring AIX-specific build blocker, allowing engineers to focus on feature development and bug fixes elsewhere. Technologies/skills demonstrated: - C/C++ cross-platform builds, macro/enum conflict resolution, and header hygiene in a large scientific codebase. - Deep debug work in a heterogeneous environment (AIX, Python/C extensions, OpenMP usage). - CI validation and reproducible builds across enterprise-grade Linux/AIX configurations. Business value: - Improves build reliability for enterprise users on AIX, reduces time-to-release for affected platforms, and shields downstream consumers from platform-specific build regressions. Commit reference: - 6127aa262546fcf0cc24e9f34858157ff73f99b3

April 2025 FAISS monthly summary: Stabilized cross-platform CI by gating mmap tests on AIX, preventing failures due to unimplemented mmap feature. The change is associated with commit a3cd63fb6aa5cb910cfa7ddb388ce6559867c4af (#4275).

January 2025: Delivered a targeted cross-platform reliability improvement by fixing the AIX-specific shared library archiving process in the Meson build system. This addresses a long-standing build failure when the AIX SO archive flag is enabled and enhances platform portability and CI stability.