126 lines
3.8 KiB
Markdown
126 lines
3.8 KiB
Markdown
# LinuxCNC rs274 source map
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This is the working map for moving from native `librs274` linking to source-level compilation and then to wasm.
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## Compile assumptions
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Native user-space syntax checks require:
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- `-DULAPI`
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- LinuxCNC include roots:
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- `linuxcnc/src`
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- `linuxcnc/src/emc`
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- `linuxcnc/src/emc/nml_intf`
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- `linuxcnc/src/emc/rs274ngc`
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- `linuxcnc/src/emc/motion`
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- `linuxcnc/src/emc/pythonplugin`
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- `linuxcnc/include`
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- Python development headers for current upstream sources, because the interpreter still embeds Python/Boost.Python paths.
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## Source groups
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### Interpreter core
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These are the first group to keep compiling while we peel away native-only dependencies:
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- `interp_arc.cc`
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- `interp_array.cc`
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- `interp_base.cc`
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- `interp_check.cc`
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- `interp_convert.cc`
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- `interp_cycles.cc`
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- `interp_execute.cc`
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- `interp_find.cc`
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- `interp_g7x.cc`
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- `interp_inspection.cc`
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- `interp_internal.cc`
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- `interp_inverse.cc`
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- `interp_namedparams.cc`
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- `interp_o_word.cc`
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- `interp_python.cc`
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- `interp_queue.cc`
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- `interp_read.cc`
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- `interp_remap.cc`
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- `interp_setup.cc`
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- `interp_write.cc`
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- `modal_state.cc`
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- `nurbs_additional_functions.cc`
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- `rs274ngc_pre.cc`
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### Python binding modules
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These are not needed for the browser simulator ABI and should not be part of the wasm core:
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- `canonmodule.cc`
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- `gcodemodule.cc`
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- `interpmodule.cc`
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- `pyarrays.cc`
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- `pyblock.cc`
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- `pyemctypes.cc`
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- `pyinterp1.cc`
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- `pyparamclass.cc`
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### Browser-hostile dependencies to replace
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- Python/Boost.Python remap and named parameter hooks.
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- `dlopen`/`dlsym` interpreter loading in `interp_base.cc`.
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- mmap-backed `tooldata_mmap.cc`.
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- persistent parameter file writes.
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- dynamic INI/HAL queries.
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## Current syntax probe
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Run:
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```bash
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./test-linuxcnc-source-syntax.sh
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```
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The probe checks a representative subset of source files with `-DULAPI`. It is not a full source build yet; it is a guardrail before the full source backend is introduced.
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## Current object probe
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Run:
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```bash
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./test-linuxcnc-source-objects.sh
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```
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This compiles every `core:` entry in `linuxcnc-rs274-source-files.txt` into object files. As of this step, the core interpreter sources compile to `.o` in the native environment with `-DULAPI`.
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The next boundary is linking. Expected link risks:
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- `PythonPlugin` and Boost.Python symbols from remap/named parameter paths.
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- Python module initialization symbols if the source backend reuses the existing builtin module setup.
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- `tooldata_*` implementations, currently mmap-backed in native LinuxCNC and unsuitable for wasm.
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- dynamic loader code in `interp_base.cc`.
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- parameter file persistence in `rs274ngc_pre.cc`.
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## Current source-link probe
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Run:
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```bash
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./test-linuxcnc-source-link.sh
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```
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This compiles every `core:` interpreter source into local objects and links the
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native runner without `librs274`. It still uses built LinuxCNC support objects
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and libraries for the dependencies that have not been replaced yet:
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- Boost.Python binding module initializers required by the current interpreter constructor.
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- `libpyplugin` for Python remap and named-parameter hooks.
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- `liblinuxcncini` and `liblinuxcnchal` for INI/HAL named parameter paths.
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- `liblinuxcnc-uspace-posix` for `rtapi_*` user-space helpers.
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- `libtooldata` for the current mmap-backed native tool table.
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This is not wasm-ready yet, but it proves the simulator can own and compile the
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RS274 interpreter core sources directly. The next source-port boundary is to
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replace each support dependency with browser-safe shims instead of pulling in
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the LinuxCNC task, motion, HAL, and Python runtime layers.
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The native runner used by this probe now recognizes simulator-owned control
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lines before handing code to LinuxCNC: `M428`, `M429`, `M430`, `G43.4`,
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`G43.5`, and `G49`. This keeps the direct runner aligned with the public
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`linuxcnc-rs274` API backend for RTCP and kinematics switch tests.
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