cnc_wams/wasm-port/docs/scope-and-baseline.md

Scope And Baseline

Upstream Source Baseline

The standalone port currently treats ../linuxcnc/ as the read-only upstream source provider.

• Upstream repository: ../linuxcnc
• Upstream branch at baseline: master
• Upstream commit: 60597ee0718873d2449058c824262a275e5e4bad
• Upstream subject: Merge pull request #4043 from grandixximo/docs-inkscape-rsvg-shim
• Upstream author: andypugh
• Upstream commit date: 2026-05-19T15:26:50+01:00

The upstream working tree is allowed to contain unrelated local files, but the vendored-source validation is tied to the commit above. If upstream HEAD changes, re-run extraction intentionally and update this baseline in the same change.

Local Build Assumptions

• C++ compiler: g++ (Debian 14.2.0-19) 14.2.0
• C compiler: gcc (Debian 14.2.0-19) 14.2.0
• Python: Python 3.13.5
• Node.js: v20.19.2
• Emscripten: emcc 3.1.69

Current Fixture Baseline

The native standalone validation currently uses the fixture set under tests/fixtures/.

G-code fixture coverage includes:

• linear traverse and feed
• arc semantics
• modal incremental and absolute distance modes
• length unit switching
• plane selection
• position parameters
• canned cycles
• coordinate offsets
• G53 machine-coordinate motion
• feed and motion control modes
• cutter compensation motion
• probe semantics
• spindle-synchronized threading and rigid tap
• NURBS G5 and G6
• spindle orient
• tool semantics and tool table setup
• local, INI-backed named parameters and numbered parameters
• O-word subroutines
• program-end modal reset
• canonical runtime edge calls

Negative fixture coverage includes:

• zero-feed G1
• arc radius mismatch
• zero-radius arc
• cutter compensation plane-change rejection
• G53 incremental-mode rejection
• read-only named parameter writes
• read-only numbered parameter writes
• missing tool
• missing tool length offset

The native baseline compares those negative fixtures with upstream rs274 -g for expected error text and absent canonical-event constraints.

Machine baseline is still limited to standalone interpreter, trajectory planner, LinuxCNC identity/trivial kinematics, LinuxCNC 5axiskins XYZBCW bridge-mill probing, LinuxCNC TRT xyzac/xyzbc probing, and vendored LinuxCNC five-axis sample machine assets for M428, M429, and M430 switchkins remaps, including LinuxCNC interp_remap.cc descriptor parsing for TRT NGC remaps. Full standalone execution of those remaps still needs LinuxCNC O-word remap dispatch and HAL synchronization boundaries connected.