PC port: full compile + link milestone (ge007.x86_64.exe builds clean)

All ~235 translation units now compile and the target links under MSYS2
GCC 16 + CMake/Ninja (ninja ge007 -k 0: 236/236, zero errors). N64 build
untouched; every src/ change is -DPORT-gated.

Portability fixes (findings D7-D17 in docs/PCPortResearch.md section 11):
- AI X-macro system: SWITCH() call sites activated to the author's
  hand-written byte-identical references under PORT; port/shim/
  bondaicommands.h + bondconstants.h + CPPLib.h re-emit the IDO paste
  tricks (isSubroutine, file-record macros, generated CALL) GCC-clean.
- 64-bit pointer-in-word initializers: monAnim jump targets now go
  through an index table resolved by the interpreter (chrai.h/propobj.c);
  UsetuplenZ.c credits pointer PORT-gated to 0.
- IDO printf engine compiled for PC (xprintf/xlitob/xldtob) with a
  shadow xstdio.h resolving the _Printf prototype clash.
- Host-libc gaps stubbed in port/: bcopy/bzero, __libm_qnan_f,
  tlbmanage*, g_ViXScales/YScales; chrObjRandom PRNG ported from .s.

Asset data strategy (D16): single-file assets compiled for real
(animation tables, fonts, textures, rareware logo); obseg per-file .c
excluded (colliding file-local globals the N64 build isolates via
per-ELF linking); 758 ROM-derived table symbols + ramrom_* + segment
markers stubbed in port/src/assetstubs.c / n64stubs.c.

fast3d is a no-op placeholder (port/src/gfxstub.c) until Phase 2 brings
in the real software RSP. Binary not yet runnable end-to-end: ROM
loading in romdata.c is still a TODO.

AGENTS.md

@@ -0,0 +1,52 @@
+# AGENTS.md — GoldenEye 007 PC Port
+
+## What this is
+
+- `n64decomp/007`: WIP decompilation of GoldenEye 007 (N64), byte-matches US/EU/JP ROMs.
+- Active work: **PC port** modelled on the Perfect Dark PC port (same Rare "Indy" engine family).
+- **Read `docs/PCPortResearch.md` first** — architecture, GE-specific RSP deltas, phased plan, and review findings (A1–C2 in §11).
+
+## Non-negotiables
+
+1. **N64 build untouched.** `Makefile`, `tools/`, `rsp/`, `ld/` belong to the N64 build. Never modify them for the PC port.
+2. **Game code compiles unmodified.** `src/game/*.c` + the curated `src/*.c` list compile as-is for the host. All N64 hardware dependencies are satisfied by the `port/` layer. If a game file seems to need a change, stop — the fix belongs in `port/`.
+3. **Region macros mirror the Makefile.** `CMakeLists.txt` `REGION_DEFS` must match the N64 Makefile's per-region macro set exactly (finding A1). Divergence = silent branch divergence + link failures.
+4. **`src/libultrare/Makefile.libultrare` is ground truth** for original-vs-Rare libultra files (finding B3). The PC build compiles: `libultra/audio`, `libultrare/audio` (drvrNew/env/reverb), `libultra/gu`, and `libultrare/io/vitbl.c` only. All other `io/` + `os/` files are excluded and shimmed in `port/src/libultra.c`.
+5. **`rsp/graphics/gmain.s` is the RSP ground truth** — the authoritative reference for which GBI commands GE emits (modified fast3d, 1545 lines). We do not run it on PC; `port/fast3d/` replaces it. Use it to validate the software RSP's command decoding and the custom CC/RM modes.
+
+## Critical files
+
+| File | Role |
+|---|---|
+| `docs/PCPortResearch.md` | Research + plan + findings (A1–C2). Read first. |
+| `CMakeLists.txt` | PC build (parallel to the N64 Makefile). Source list + `REGION_DEFS` live here. |
+| `port/src/` | Shims: `libultra.c` (OS API), `gesched.c` (scheduler), `n64stubs.c` (boot/TLB/FPU/rmon), `random.c` (PRNG ported verbatim from `random.s`), `ucode.c` (microcode segment markers), `main.c`, `video.c`, … |
+| `port/fast3d/` | Software RSP (adapted from the PD port). The main Phase 2 work. |
+| `rsp/graphics/gmain.s` | GE's RSP ucode — ground truth for GBI/CC/RM. |
+| `PD_PORT_CHECKOUT` | Perfect Dark PC port checkout — ground truth for the port layer. Its `port/fast3d/` is the starting point for ours. |
+
+## Build
+
+```sh
+./build-pc.sh ntsc-final   # or pal-final / jpn-final
+```
+
+Needs CMake + SDL2 + zlib + OpenGL (MSYS2 packages: see `build-pc.sh` header). ROM goes in `./data/` (not distributed).
+
+## Verification ritual (after any build-affecting change)
+
+1. **Undefined symbols.** Every symbol referenced by the compiled set (see `CMakeLists.txt`: `SRC_GAME`, `SRC_ENGINE`, `SRC_LIBAUDIO`, `SRC_LIBULTRARE_AUDIO`, `SRC_LIBULTRARE_DATA`, `SRC_GU`, `SRC_PORT*`) must be defined exactly once in the compiled set or in `port/`. Symbols that live in EXCLUDED files (`libultra/io/*`, `libultrare/io/*` except `vitbl.c`, `libultra/os/*`, `libultrare/os/*`, `sched.c`, `rmon.c`, `vi.c`, `src/*.s`) must be provided by `port/src/libultra.c`, `gesched.c`, `n64stubs.c`, `random.c`, or `ucode.c`.
+2. **Duplicates.** No symbol defined twice across the compiled set (watch `sp_*` stacks, `rmon*`, `os*` shims, segment markers).
+3. **Syntax.** Every touched file must parse; once the toolchain is installed, `./build-pc.sh` is the final word.
+
+Run `/linkcheck` for this sweep. Record new findings in `docs/PCPortResearch.md` §11 style (next label after the last used).
+
+## Phase status
+
+- **Phase 0 (scaffolding):** done, committed.
+- **Compile+link milestone:** all ~235 TUs compile and `ge007.x86_64.exe` links clean (`ninja ge007 -k 0`, 236/236). Findings D7–D17 in `docs/PCPortResearch.md` §11; asset stubs in `port/src/assetstubs.c`, fast3d no-ops in `port/src/gfxstub.c` (delete when real fast3d lands).
+- **Phase 1 (boot to window):** remaining — ROM loading in `romdata.c` (currently a TODO), run the binary, wire gfx stubs to a real window.
+- **Phase 2 (rendering):** bring in PD fast3d (replaces `port/src/gfxstub.c`), verify custom CC/RM modes against `gmain.s`, port the scheduler; replace asset stubs with ROM-backed data (D16).
+- **Phase 2 (rendering):** bring in PD fast3d, verify custom CC/RM modes against `gmain.s`, port the scheduler.
+- **Phase 3 (audio + input):** libaudio → SDL; decide the ASP strategy (C2: `aspMain*` dummies in `ucode.c`).
+- **Phase 4 (saves + polish):** file-backed EEPROM; PFS/motor already no-op stubs.