[Afloat16]

Problem

The documented RTB_PURE_WHEEL=1 build still enables C and C++ in project() and resolves Python development headers and nanobind unconditionally. A machine without a compiler therefore cannot build the pure-Python wheel, even though both native extensions are disabled.

Change

Configure the project with no languages initially. Enable C/C++ and locate the extension-only dependencies inside the existing RTB_BUILD_EXTENSIONS branch. Compiled builds keep the same extension configuration.

Validation

• The original pure-wheel build failed during CMake configuration because no C/C++ compiler was available.
• RTB_PURE_WHEEL=1 CC=rtb-no-c-compiler CXX=rtb-no-cxx-compiler python -m pip wheel --no-deps .: successfully produced roboticstoolbox_python-1.5.0-py3-none-any.whl.
• Inspected the archive: Root-Is-Purelib: true, Tag: py3-none-any, and no .so, .pyd or .dll files.
• PYTHONPATH=src python -m pytest tests/test_fknm_fallback.py -q: 33 passed, 42 skipped. Native-extension comparison cases were skipped because the extensions are unavailable.
• git diff --check passed.

A native build was not run locally because this environment has no compiler.

[codacy-production]

Up to standards ✅

🟢 Issues 0 issues

Results:
0 new issues

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