The build is strict about floating-point contraction on every target: -ffp-contract=off on GCC/Clang, /fp:precise on MSVC, replacing -ffast-math / /fp:fast. netcode's wire format carries no floating point, so this is the family floor rather than a wire fix: contraction is architecture-dependent, and the strict build keeps float arithmetic near a wire from diverging bit-wise between architectures. BUILDING.md states the policy to consumers. SECURITY.md links the published advisory.