Lightning Talk: Not Much option() Left - Surviving CMake With Toolchain Files
summary
CMake option() interacts badly with CMAKE_TOOLCHAIN_FILE: older CMake (around 3.12) reads options inconsistently unless you write cache variables or use FORCE, CMP-777 and CMP-126 later change that behavior, and newer CMake then makes toolchain-set options non-overridable from the command line. The uploader describes building a small helper called toolchain_overridable_option (open as a PR on HFC) that stores values in the cache and respects overrides across versions, fixing flaky builds caused by mixed option() vs cache behavior and the CMP-777/CMP-126 changes.
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