Audit GenDataFooter conditional compilation flags across cmake targets

[SonicField]

GenDataFooter conditional compilation complexity

GenDataFooter has conditional fields guarded by #ifdef ENABLE_LIGHTWEIGHT_FRAMES and #ifdef aarch64. This means sizeof(GenDataFooter) can vary between compilation units if preprocessor flags differ.

Current state

• sizeof(GenDataFooter) = 80 on aarch64 with ENABLE_LIGHTWEIGHT_FRAMES=1 (verified via GDB)
• static_assert(sizeof(GenDataFooter) == 80) added to gen_asm.cpp and generators_mm.cpp
• The static_asserts catch compile-time inconsistencies

Remaining risk

• The cmake build system should be audited to confirm all compilation units that use GenDataFooter receive identical preprocessor flags
• If sizeof differs between units, the allocator and consumer disagree on struct layout, causing silent memory corruption
• The static_asserts are a mitigation, not a root cause fix

Recommendation

Audit cmake targets for gen_asm.cpp, generators_mm.cpp, gen_data_footer.cpp, jit_rt.cpp, and generators_rt.cpp to verify identical preprocessor definitions.