pcbnew_embind.cpp pulls kicad_clipboard.h -> pcb_io_kicad_sexpr_parser.h ->
pcb_lexer.h, a header GENERATED during make (make_lexer custom command on the
pcbcommon target). The embind compile runs right after CMake configure, so on
a fresh build dir the header doesn't exist yet — the ephemeral Hetzner main CI
(run 27327303032) died on it in minutes. Local/incremental dirs already had the
header, which is why 9dbfddc's -I${KICAD_BUILD}/common alone seemed sufficient.
Pre-build pcbcommon before compiling the bindings: make resolves the real
dependency graph (no duplicated lexer-generator args), the app target needs
pcbcommon anyway so total build time is unchanged, and incrementally it's a
no-op. Verified by deleting pcb_lexer.h/pcb_keywords.cpp/pcbnew_embind.o inside
the docker build-cache volume and rebuilding: pre-build regenerates the header
before the embind compile succeeds.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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