Where to split: the jtbl spans (tables pack tight within a TU, separated across TUs), and
that is also the MINIMUM — a TU with no switch emits no table and is invisible, so what
you recover is a lower bound on the original structure, not the structure.
What crosses: ask the compiler. 2,318 externs is the scary number and the wrong one; only
57 of 1,247 declared names cross a boundary, 19 of them typedefs with one definition each
and zero shape conflicts. Fix TYPES first — a missing typedef cascades into dozens of
parse errors that all evaporate at once.
Plus the general defect it exposed (a typedef stripper must read the destination's
includes) and the operational rule it cost twice (gate_main reverts src/*.c first, so
commit alignment edits before gating).
Drew T
3e8138819a