subagent transcript

session 17f09f89 · workflow wf_6c234df9
← 17f09f89 · archive
delegated task
GOAL: port PySide6 + shiboken6 to the FreeCAD WebAssembly toolchain (static, no-dlopen, asyncify, no-pthreads) so FreeCAD's Python/PySide workbenches
▸ Magik
GOAL: port PySide6 + shiboken6 to the FreeCAD WebAssembly toolchain (static, no-dlopen, asyncify, no-pthreads) so FreeCAD's Python/PySide workbenches and macros work in the browser. This is the keystone dependency. Ground EVERYTHING in the real files — investigate, do not speculate. ESTABLISHED GROUND TRUTH (verified this session): - PySide+shiboken SOURCE: /tmp/pyside-setup (git branch 6.11, matches Qt). sources/shiboken6, sources/shiboken6_generator, sources/pyside6 (check exact dir names). Built via setup.py + coin_build_instructions.py OR raw CMake per sources/*/CMakeLists.txt + README.*.md at repo root. - HOST toolchain (x86-64 Linux): clang/llvm 21 with libclang at /usr/lib/llvm-21/lib/libclang.so (llvm-config = 21.1.8); host CPython 3.14.4 (/usr/bin/python3, headers /opt/toolchains/src/Python-3.14.4/Include); host Qt 6.11.1 at /opt/toolchains/qt/6.11.1/gcc_64. - TARGET (wasm): emscripten 4.0.12 (/opt/toolchains/emsdk); Qt 6.11.1 asyncify single-thread at /opt/toolchains/qt-asyncify/6.11.1/wasm_singlethread (QT_FEATURE_thread == -1, i.e. -no-feature-thread); wasm CPython 3.14 at /opt/toolchains/python-wasm (headers include/python3.14, lib/python3.14.zip). FreeCAD-wasm build dir: /opt/toolchains/src/freecad-gui-build (reads Qt6_DIR=qt-asyncify/.../wasm_singlethread). - FreeCAD build links Python C-extensions STATICALLY and registers them via PyImport_AppendInittab in a generated src/Main/WasmInittab*.cpp (NO dlopen on wasm). PySide bindings must follow this model: build as STATIC libs, expose PyInit_* for each module (PySide6.QtCore etc.), register in the inittab. - FreeCAD source: /home/magik6k/lcad-wasm/freecad-port/FreeCAD (branch wasm-port). It ships a PySide shim at src/Ext/PySide (a compat layer) and uses shiboken (getCppPointer/wrapInstance) e.g. in Gui/PythonWrapper.cpp. FREECAD_USE_PYSIDE/FREECAD_USE_SHIBOKEN currently OFF. - KNOWN HARD ISSUES to design around: (1) static + NO dlopen — PySide's normal build emits shared modules; must emit static + inittab. (2) Qt is -no-feature-thread — shiboken typesystem for QtCore references QThread/QMutex/etc.; those must be excluded/guarded. (3) CPython 3.14 C-API changes vs what PySide 6.11 targets. (4) asyncify + JS-exceptions (-fexceptions) flags must match FreeCAD's; libshiboken/libpyside signal dispatch must be single-thread/asyncify safe. (5) binary size (wasm is already 196 MB; each Qt binding module is tens of MB — target ONLY the modules FreeCAD needs). DELIVERABLES — do BOTH: 1. Write a thorough, concrete, execution-ready plan to /home/magik6k/lcad-wasm/pyside-port/<SLUG>/plan.md with exact commands, cmake args, file paths, patch snippets (precise enough to apply), and any test outputs you gathered. Put patch/new-file contents as separate files in that dir. If you build/test something, capture the real output. 2. Return the structured summary (schema). Depth goes in plan.md; keep summary fields tight. Token cost is not a concern — be exhaustive and correct. Prefer running real commands (grep, ls, cmake --help, small test builds) over speculation. === YOUR SCOPE: Define the minimal proof-of-concept + validation test (slug: poc-minimal) === Define the SMALLEST end-to-end proof of concept that validates the whole pipeline: host-generate a tiny binding (e.g. QtCore restricted to QObject + QString + a couple methods, or the smallest viable QtCore), cross-compile it static for wasm, register PyInit_QtCore in an inittab, link into a minimal test executable (or into FreeCAD), and prove 'from PySide6 import QtCore; QtCore.QObject()' works in the browser/node-wasm. Specify the exact reduced typesystem, the build steps, and the pass/fail test. This is milestone 1 — getting it green de-risks everything. Also define milestone 2 (QtWidgets minimal) and 3 (FreeCAD integration: FREECAD_USE_PYSIDE=ON + inittab + getMainWindow()). Create /home/magik6k/lcad-wasm/pyside-port/poc-minimal/ and write plan.md (required) + any patches. Return the schema with deliverableFile=/home/magik6k/lcad-wasm/pyside-port/poc-minimal/plan.md.
Fable
thinking
I need to dig into the actual codebase to understand what I'm working with—exploring the source structure, checking existing builds, and mapping out the overall architecture so I can tackle this systematically.
Fable
I'll investigate the real files before writing anything. Let me start exploring the source trees in parallel.
Fable
⚙ Bash {"command": "echo \"=== pyside-setup source ===\" && ls /tmp/pyside-setup 2>&1 | head -50; echo \"=== sources ===\"; ls /tmp/pyside-setup/sources 2>&1", "description": "List pyside-setup source tree"}
tool result
=== pyside-setup source ===
CMakeLists.txt
LICENSES
README.md
README.pyside6.md
README.pyside6_addons.md
README.pyside6_essentials.md
README.pyside6_examples.md
README.shiboken6-generator.md
README.shiboken6.md
SECURITY.md
build_history
build_scripts
coin
coin_build_instructions.py
coin_test_instructions.py
create_wheels.py
doc
examples
keyword-errors.lst
requirements-coin.txt
requirements-doc.txt
requirements.txt
setup.py
sources
testing
testrunner.py
tools
wheel_artifacts
=== sources ===
pysid  …[truncated]
Fable
⚙ Bash {"command": "echo \"=== emsdk ===\"; ls /opt/toolchains/emsdk 2>&1 | head; echo \"=== qt-asyncify ===\"; ls /opt/toolchains/qt-asyncify/6.11.1/wasm_singlethread 2>&1 | head; echo \"=== python-wasm ===\"; ls /opt/toolchains/python-wasm 2>&1;…
tool result
=== emsdk ===
LICENSE
README.md
SECURITY.md
aqtinstall.log
bazel
docker
downloads
emcmdprompt.bat
emscripten-releases-tags.json
emsdk
=== qt-asyncify ===
bin
doc
include
lib
libexec
metatypes
mkspecs
modules
plugins
sbom
=== python-wasm ===
include
lib
link-flags-reference.txt
=== freecad-gui-build ===
CMakeCache.txt
CMakeFiles
Coin.pc
Ext
FreeCAD.thumbnailer
LibraryVersions.h
backtrace.cpp
bin
build.ninja
cMake
cmake_install.cmake
coin-default.cfg
compile_commands.json
config.h
data
freecad-thu  …[truncated]
Fable
⚙ Bash {"command": "echo \"=== pyside-port dir ===\"; ls -la /home/magik6k/lcad-wasm/pyside-port 2>&1; echo \"=== freecad port ===\"; ls /home/magik6k/lcad-wasm/freecad-port/FreeCAD 2>&1 | head", "description": "Check pyside-port and freecad dirs"…
tool result
=== pyside-port dir ===
total 0
drwxr-xr-x 1 agent agent   74 Jul  5 12:36 .
drwxr-xr-x 1 agent agent 2262 Jul  5 12:34 ..
drwxr-xr-x 1 agent agent    0 Jul  5 12:36 fc-pyside-usage
drwxr-xr-x 1 agent agent    0 Jul  5 12:36 qt-nothread-typesystem
=== freecad port ===
AI_POLICY.md
CMakeLists.txt
CMakePresets.json
CODE_OF_CONDUCT.md
CONTRIBUTING.md
LICENSE
PRIVACY_POLICY.md
README.md
SECURITY.md
cMake
Fable
thinking
I need to dig deeper into the related directories and understand how Shiboken generates bindings, then trace through FreeCAD's module registration system to see how static Python modules get initialized.
Fable
Let me dig into shiboken structure, the generator, and how FreeCAD does static inittab registration.
Fable
⚙ Bash {"command": "echo \"=== shiboken6 ===\"; ls /tmp/pyside-setup/sources/shiboken6; echo; echo \"=== shiboken6/libshiboken ===\"; ls /tmp/pyside-setup/sources/shiboken6/libshiboken 2>&1 | head -40; echo; echo \"=== shiboken6_generator ===\"; l…
tool result
=== shiboken6 ===
AUTHORS
CMakeLists.txt
COPYING
COPYING.libsample
COPYING.libshiboken
Doxyfile
cmake
cmake_uninstall.cmake
config.tests
data
doc
generatorrunnerconfig.h.in
generatorrunnermacros.h
icecc.cmake
libshiboken
shiboken_version.py
shibokenmodule
tests

=== shiboken6/libshiboken ===
CMakeLists.txt
autodecref.h
basewrapper.cpp
basewrapper.h
basewrapper_p.h
bindingmanager.cpp
bindingmanager.h
bufferprocs_py37.cpp
bufferprocs_py37.h
debugfreehook.cpp
debugfreehook.h
embed
gilstate.cpp
gils  …[truncated]
Fable
⚙ Bash {"command": "echo \"=== pyside6/PySide6 dir ===\"; ls /tmp/pyside-setup/sources/pyside6/PySide6 2>&1 | head -60; echo \"=== QtCore typesystem ===\"; ls /tmp/pyside-setup/sources/pyside6/PySide6/QtCore 2>&1 | head", "description": "List pysi…
tool result
=== pyside6/PySide6 dir ===
CMakeLists.txt
Qt3DAnimation
Qt3DCore
Qt3DExtras
Qt3DInput
Qt3DLogic
Qt3DRender
QtAsyncio
QtAxContainer
QtBluetooth
QtCanvasPainter
QtCharts
QtConcurrent
QtCore
QtDBus
QtDataVisualization
QtDesigner
QtGraphs
QtGraphsWidgets
QtGui
QtHelp
QtHttpServer
QtLocation
QtMultimedia
QtMultimediaWidgets
QtNetwork
QtNetworkAuth
QtNfc
QtOpenGL
QtOpenGLWidgets
QtPdf
QtPdfWidgets
QtPositioning
QtPrintSupport
QtQml
QtQuick
QtQuick3D
QtQuickControls2
QtQuickTest
QtQuickWidgets
QtRemot  …[truncated]
Fable
⚙ Bash {"command": "echo \"=== FreeCAD WasmInittab ===\"; find /home/magik6k/lcad-wasm/freecad-port/FreeCAD -name 'WasmInittab*' 2>&1; find /opt/toolchains/src/freecad-gui-build -name 'WasmInittab*' 2>&1", "description": "Find WasmInittab files"}
tool result
=== FreeCAD WasmInittab ===
/opt/toolchains/src/freecad-gui-build/src/Main/WasmInittabGui.cpp
/opt/toolchains/src/freecad-gui-build/src/Main/WasmInittab.cpp
/opt/toolchains/src/freecad-gui-build/src/Main/CMakeFiles/FreeCADMain.dir/WasmInittabGui.cpp.o
Fable
Let me examine the inittab generation model and the QtCore module structure closely.
Fable
⚙ Bash {"command": "echo \"=== WasmInittab.cpp ===\"; cat /opt/toolchains/src/freecad-gui-build/src/Main/WasmInittab.cpp; echo \"=== WasmInittabGui.cpp (head) ===\"; head -80 /opt/toolchains/src/freecad-gui-build/src/Main/WasmInittabGui.cpp", "des…
tool result
=== WasmInittab.cpp ===
// Generated by src/Main/CMakeLists.txt (wasm port)
#include <Python.h>
extern "C" PyObject* PyInit_Part();
extern "C" PyObject* PyInit_Sketcher();
extern "C" PyObject* PyInit__PartDesign();
extern "C" PyObject* PyInit_Spreadsheet();
extern "C" PyObject* PyInit_Materials();
extern "C" PyObject* PyInit_Measure();
extern "C" PyObject* PyInit_Surface();
extern "C" PyObject* PyInit_Import();
void freecadWasmRegisterInittab()
{
    PyImport_AppendInittab("Part", PyInit_Part);
  …[truncated]
Fable
⚙ Bash {"command": "echo \"=== how inittab generated ===\"; grep -rn \"WasmInittab\\|AppendInittab\\|PyImport_AppendInittab\" /home/magik6k/lcad-wasm/freecad-port/FreeCAD/src/Main/ 2>&1 | head -30; echo \"=== cmake gen ===\"; grep -rln \"WasmInitt…
tool result
=== how inittab generated ===
/home/magik6k/lcad-wasm/freecad-port/FreeCAD/src/Main/CMakeLists.txt:67:            string(APPEND _regs "    PyImport_AppendInittab(\"${_pymod}\", PyInit_${_pymod});\n")
/home/magik6k/lcad-wasm/freecad-port/FreeCAD/src/Main/CMakeLists.txt:78:    freecad_wasm_generate_inittab(${CMAKE_CURRENT_BINARY_DIR}/WasmInittab.cpp
/home/magik6k/lcad-wasm/freecad-port/FreeCAD/src/Main/CMakeLists.txt:80:    freecad_wasm_generate_inittab(${CMAKE_CURRENT_BINARY_DIR}/WasmInittabGui.c  …[truncated]
Fable
Let me look at the inittab CMake function and how a FreeCAD wasm python module is built statically (the pattern I must replicate for PySide).
Fable
⚙ Bash {"command": "sed -n '40,160p' /home/magik6k/lcad-wasm/freecad-port/FreeCAD/src/Main/CMakeLists.txt", "description": "Show inittab cmake function and usage"}
tool result
    endif()
    if(BUILD_IMPORT)
        list(APPEND FREECAD_WASM_PY_MODULES Import)
        list(APPEND FREECAD_WASM_PY_GUI_MODULES ImportGui)
    endif()
    if(BUILD_START)
        list(APPEND FREECAD_WASM_PY_GUI_MODULES StartGui)
    endif()
    if(NOT BUILD_GUI)
        set(FREECAD_WASM_PY_GUI_MODULES "")
    endif()

    function(freecad_wasm_generate_inittab outfile)
        set(_decls "")
        set(_regs "")
        foreach(_mod IN LISTS ARGN)
            # A Python C-extension's modul  …[truncated]
Fable
⚙ Bash {"command": "grep -rn \"WASM\\|EMSCRIPTEN\\|PyInit\\|add_library.*STATIC\\|SET_PYTHON_PREFIX_SUFFIX\\|MODULE\" /home/magik6k/lcad-wasm/freecad-port/FreeCAD/src/Mod/Part/App/CMakeLists.txt 2>&1 | head -40", "description": "Check how Part mod…
tool result
/home/magik6k/lcad-wasm/freecad-port/FreeCAD/src/Mod/Part/App/CMakeLists.txt:648:SET_PYTHON_PREFIX_SUFFIX(Part)
Fable
thinking
I need to understand how FreeCAD builds Python C-extension modules as static libraries for WebAssembly, particularly looking at the prefix/suffix settings, how the PyInit mechanism works for static modules, and how FreeCAD's macros handle the module initialization and static library definitions.
Fable
⚙ Bash {"command": "grep -rn \"SET_PYTHON_PREFIX_SUFFIX\\|add_library\\|PyMODINIT\\|EMSCRIPTEN\\|STATIC\" /home/magik6k/lcad-wasm/freecad-port/FreeCAD/cMake/FreeCADMacros.cmake 2>&1 | head; echo \"=== search macro def ===\"; grep -rln \"macro(SET_…
Fable
⚙ Bash {"command": "grep -rn \"SET_PYTHON_PREFIX_SUFFIX\" /home/magik6k/lcad-wasm/freecad-port/FreeCAD/cMake/*.cmake; echo \"---def---\"; awk '/SET_PYTHON_PREFIX_SUFFIX/,/endmacro|endfunction/' /home/magik6k/lcad-wasm/freecad-port/FreeCAD/cMake/Fr…
tool result
ugrep: warning: /home/magik6k/lcad-wasm/freecad-port/FreeCAD/cMake/FreeCADMacros.cmake: No such file or directory
=== search macro def ===
/home/magik6k/lcad-wasm/freecad-port/FreeCAD/cMake/FreeCadMacros.cmake
tool result
/home/magik6k/lcad-wasm/freecad-port/FreeCAD/cMake/FreeCadMacros.cmake:289:MACRO(SET_PYTHON_PREFIX_SUFFIX ProjectName)
/home/magik6k/lcad-wasm/freecad-port/FreeCAD/cMake/FreeCadMacros.cmake:300:ENDMACRO(SET_PYTHON_PREFIX_SUFFIX)
---def---
Fable
⚙ Bash {"command": "sed -n '280,320p' /home/magik6k/lcad-wasm/freecad-port/FreeCAD/cMake/FreeCadMacros.cmake; echo \"=== how add_library STATIC for wasm modules ===\"; grep -rn \"EMSCRIPTEN\\|STATIC\\|MODULE\\|add_library\" /home/magik6k/lcad-wasm…
tool result
                set_property(TARGET ${ProjectName} APPEND PROPERTY INSTALL_RPATH ${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_LIBDIR})
            else()
                set_property(TARGET ${ProjectName} APPEND PROPERTY INSTALL_RPATH ${CMAKE_INSTALL_LIBDIR})
            endif()
        endif()
    endif(WIN32)
ENDMACRO(SET_BIN_DIR)

# Set python prefix & suffix together
MACRO(SET_PYTHON_PREFIX_SUFFIX ProjectName)
    if(NOT MSVC)
        set_target_properties(${ProjectName} PROPERTIES PRE  …[truncated]
Fable
⚙ Bash {"command": "grep -rn \"EMSCRIPTEN\\|add_library\\|STATIC\\|SET_PYTHON\" /home/magik6k/lcad-wasm/freecad-port/FreeCAD/cMake/FreeCadMacros.cmake | head -40", "description": "Find where library type set for wasm"}
tool result
/home/magik6k/lcad-wasm/freecad-port/FreeCAD/cMake/FreeCadMacros.cmake:289:MACRO(SET_PYTHON_PREFIX_SUFFIX ProjectName)
/home/magik6k/lcad-wasm/freecad-port/FreeCAD/cMake/FreeCadMacros.cmake:300:ENDMACRO(SET_PYTHON_PREFIX_SUFFIX)
Fable
thinking
I'm wondering if there's a global CMake override that's converting SHARED libraries to STATIC when building for WebAssembly with Emscripten—I should check the top-level CMakeLists to see what policy or variable is causing this behavior.
Fable
⚙ Bash {"command": "grep -rn \"BUILD_SHARED_LIBS\\|SHARED.*STATIC\\|EMSCRIPTEN\\|add_library\" /home/magik6k/lcad-wasm/freecad-port/FreeCAD/CMakeLists.txt | head -30", "description": "Find shared->static override for wasm"}
tool result
/home/magik6k/lcad-wasm/freecad-port/FreeCAD/CMakeLists.txt:91:if(EMSCRIPTEN)
/home/magik6k/lcad-wasm/freecad-port/FreeCAD/CMakeLists.txt:96:    function(add_library name)
/home/magik6k/lcad-wasm/freecad-port/FreeCAD/CMakeLists.txt:102:            list(TRANSFORM _args REPLACE "^(SHARED|MODULE)$" "STATIC")
/home/magik6k/lcad-wasm/freecad-port/FreeCAD/CMakeLists.txt:104:        _add_library(${name} ${_args})
Fable
⚙ Bash {"command": "grep -rn \"PyMOD_INIT_FUNC\\|PyInit_Part\\|initPart\\|PyMODINIT_FUNC\" /home/magik6k/lcad-wasm/freecad-port/FreeCAD/src/Mod/Part/App/AppPart*.cpp 2>&1 | head", "description": "Show Part PyInit function"}
tool result
/home/magik6k/lcad-wasm/freecad-port/FreeCAD/src/Mod/Part/App/AppPart.cpp:221:PyMOD_INIT_FUNC(Part)
Fable
⚙ Bash {"command": "sed -n '85,130p' /home/magik6k/lcad-wasm/freecad-port/FreeCAD/CMakeLists.txt", "description": "Show the wasm add_library override"}
tool result
        FREECAD_USE_SANITIZER_LSAN
        FREECAD_USE_SANITIZER_TSAN
        FREECAD_USE_SANITIZER_UBSAN
        FREECAD_USE_SANITIZER_MSAN
)

if(EMSCRIPTEN)
    # WebAssembly port: dynamic linking is not used; every SHARED/MODULE target
    # (core libs and Python extension modules alike) becomes a static archive
    # linked into the single executable. Python extension modules are then
    # registered via PyImport_AppendInittab (see src/Main wasm inittab).
    function(add_library name)
      …[truncated]
Fable
⚙ Bash {"command": "grep -rn \"PyMOD_INIT_FUNC\" /home/magik6k/lcad-wasm/freecad-port/FreeCAD/src/Base/*.h /home/magik6k/lcad-wasm/freecad-port/FreeCAD/src/*.h 2>/dev/null | head; grep -rln \"define PyMOD_INIT_FUNC\" /home/magik6k/lcad-wasm/freeca…
tool result
/home/magik6k/lcad-wasm/freecad-port/FreeCAD/src/Base/PyObjectBase.h:67:#define PyMOD_INIT_FUNC(name) PyMODINIT_FUNC PyInit_##name(void)
/home/magik6k/lcad-wasm/freecad-port/FreeCAD/src/Base/PyObjectBase.h
Fable
thinking
Now I'm diving into how shiboken generates the module initialization code and structures the build process. I need to understand what the generated `PyInit_QtCore` function looks like, whether shiboken can emit static libraries, and how typesystems get reduced during compilation. Let me trace through the shiboken generator to see how it creates the module wrapper and then examine how PySide6 actually builds QtCore to understand the full pipeline.
Fable
Now the PySide side. Let me examine how shiboken generates module init and how QtCore is built.
Fable
⚙ Bash {"command": "echo \"=== QtCore CMakeLists (head) ===\"; sed -n '1,120p' /tmp/pyside-setup/sources/pyside6/PySide6/QtCore/CMakeLists.txt", "description": "Show QtCore module CMakeLists"}
tool result
=== QtCore CMakeLists (head) ===
# Copyright (C) 2023 The Qt Company Ltd.
# SPDX-License-Identifier: BSD-3-Clause

project(QtCore)

set(CMAKE_AUTOMOC ON)

set(QtCore_DROPPED_ENTRIES )

set(QtCore_static_sources
    "${QtCore_SOURCE_DIR}/glue/qeasingcurve_glue.cpp"
    "${QtCore_SOURCE_DIR}/glue/core_snippets.cpp"
    "${QtCore_SOURCE_DIR}/glue/qtcorehelper.cpp"
    "${QtCore_SOURCE_DIR}/glue/qiopipe.cpp"
    "${pyside6_SOURCE_DIR}/qiopipe.h"
)

if(CMAKE_SYSTEM_NAME STREQUAL "Windows")
    set(SP  …[truncated]
Fable
thinking
I need to understand how this large shiboken-generated module is structured, particularly the module wrapper that defines PyInit_QtCore and how the CMake configuration creates the library target and initializes the Python module.
Fable
⚙ Bash {"command": "sed -n '250,400p' /tmp/pyside-setup/sources/pyside6/PySide6/QtCore/CMakeLists.txt", "description": "Show QtCore CMakeLists tail with target creation"}
tool result
    list(APPEND QtCore_SRC ${QtCore_GEN_DIR}/qprocessenvironment_wrapper.cpp)
endif()

configure_file("${QtCore_SOURCE_DIR}/QtCore_global.post.h.in"
               "${QtCore_BINARY_DIR}/QtCore_global.post.h" @ONLY)

set(QtCore_glue_sources
    "${QtCore_SOURCE_DIR}/glue/qeasingcurve_glue.cpp"
    "${QtCore_SOURCE_DIR}/glue/qeasingcurve_glue.h"
)

set(QtCore_include_dirs ${QtCore_SOURCE_DIR}
                        ${QtCore_BINARY_DIR}
                        ${Qt${QT_MAJOR_VERSION}Core_INCLUDE_D  …[truncated]
Fable
Let me find `create_pyside_module` definition and how it produces the module init and library.
Fable
⚙ Bash {"command": "grep -rln \"function(create_pyside_module\\|macro(create_pyside_module\\|create_pyside_module\" /tmp/pyside-setup/sources/pyside6/*.cmake /tmp/pyside-setup/sources/pyside6/cmake/ /tmp/pyside-setup/build_scripts 2>/dev/null; ech…
tool result
/tmp/pyside-setup/sources/pyside6/cmake/Macros/PySideModules.cmake
---
/tmp/pyside-setup/sources/pyside6/cmake/Macros/PySideModules.cmake
/tmp/pyside-setup/sources/pyside6/PySide6/QtHelp/CMakeLists.txt
/tmp/pyside-setup/sources/pyside6/PySide6/QtOpenGLWidgets/CMakeLists.txt
/tmp/pyside-setup/sources/pyside6/PySide6/QtUiTools/CMakeLists.txt
/tmp/pyside-setup/sources/pyside6/PySide6/QtGui/CMakeLists.txt
/tmp/pyside-setup/sources/pyside6/PySide6/QtWebEngineCore/CMakeLists.txt
/tmp/pyside-setup/sour  …[truncated]
Fable
⚙ Bash {"command": "sed -n '1,160p' /tmp/pyside-setup/sources/pyside6/cmake/Macros/PySideModules.cmake", "description": "Show PySideModules macro"}
tool result
# Copyright (C) 2023 The Qt Company Ltd.
# SPDX-License-Identifier: BSD-3-Clause

include(CMakeParseArguments)

# A version of cmake_parse_arguments that makes sure all arguments are processed and errors out
# with a message about ${type} having received unknown arguments.
macro(pyside_parse_all_arguments prefix type flags options multiopts)
    cmake_parse_arguments(${prefix} "${flags}" "${options}" "${multiopts}" ${ARGN})
    if(DEFINED ${prefix}_UNPARSED_ARGUMENTS)
        message(FATAL_ERROR  …[truncated]
Fable
⚙ Bash {"command": "sed -n '160,320p' /tmp/pyside-setup/sources/pyside6/cmake/Macros/PySideModules.cmake", "description": "Show rest of create_pyside_module"}
tool result
    # Transform the path separators into something shiboken understands.
    make_path(force_process_system_include_paths ${force_process_system_include_paths_list})

    if(force_process_system_include_paths)
        set(force_process_system_include_paths
            "--force-process-system-include-paths=${force_process_system_include_paths}")
    endif()

    get_filename_component(pyside_binary_dir ${CMAKE_CURRENT_BINARY_DIR} DIRECTORY)

    # Install module glue files.
    string(TOLOWER ${m  …[truncated]
Fable
thinking
I see the build system uses `add_library(${module_NAME} MODULE ...)` for regular builds, but needs STATIC for WebAssembly. The generated module wrapper in `qtcore_module_wrapper.cpp` defines the PyInit function, and I need to look at either an example of that file or the generator template to understand how it's structured. I'm also exploring shiboken's `--drop-type` option as part of the reduced typesystem approach.

Now I'm checking how the module init function name gets derived from the generator source and whether there's a way to customize it away from the `PyInit_` prefix. I also need to verify whether `SHIBOKEN_PYTHON_EXTENSION_SUFFIX` affects the import behavior, and I'm searching th  …
Fable
Let me examine how shiboken generates the module init function and its naming.
Fable
⚙ Bash {"command": "grep -rn \"PyInit\\|moduleInit\\|PyModuleDef\\|SBK_MODULE_INIT\" /tmp/pyside-setup/sources/shiboken6_generator/generator/shiboken/*.cpp | grep -i \"pyinit\\|moduleinit\" | head -20", "description": "Find module init generation …
tool result
/tmp/pyside-setup/sources/shiboken6_generator/generator/shiboken/cppgenerator.cpp:6981:     s << "extern \"C\" LIBSHIBOKEN_EXPORT PyObject *PyInit_"
Fable
⚙ Bash {"command": "ls /tmp/pyside-setup/sources/shiboken6_generator/generator/shiboken/; echo \"---\"; grep -rln \"PyInit\" /tmp/pyside-setup/sources/shiboken6_generator/generator/", "description": "List generator files"}
tool result
configurablescope.h
cppgenerator.cpp
cppgenerator.h
cppgenerator_container.cpp
cppgenerator_smartpointer.cpp
ctypenames.h
generatorargument.cpp
generatorargument.h
generatorstrings.h
headergenerator.cpp
headergenerator.h
overloaddata.cpp
overloaddata.h
overridecacheentry.cpp
overridecacheentry.h
pytypenames.h
shibokengenerator.cpp
shibokengenerator.h
shibokengenerator_tpl.h
---
/tmp/pyside-setup/sources/shiboken6_generator/generator/shiboken/cppgenerator.cpp
Fable
⚙ Bash {"command": "sed -n '6960,7010p' /tmp/pyside-setup/sources/shiboken6_generator/generator/shiboken/cppgenerator.cpp", "description": "Show PyInit generation"}
tool result
                             + " in "_L1 + moduleName());

        collectFullTypeNamesArray(typeNames);

        for (const auto &typeName : std::as_const(typeNames))
            s << "{nullptr, \"" << typeName << "\"},\n";

        s << "{nullptr, nullptr}\n" << outdent << "};\n\n";
    }

    s << "// Create an array of primitive type converters for the current module.\n"
        << "static SbkConverter *sbkConverters[SBK_" << moduleName()
        << "_CONVERTERS_IDX_COUNT" << "];\n\n";
}

vo  …[truncated]
Fable
thinking
So the `PyInit_QtCore` function is generated with the export macro, and it uses the module name "QtCore" from `moduleName()`. This means the import path is just "QtCore" rather than the full "PySide6.QtCore" — though in practice, PySide6 imports work as `from PySide6 import QtCore` because the actual extension module is located at `PySide6/QtCore.abi3.so`, but the initialization function itself is named `PyInit_QtCore` without the package prefix.

For the static linking approach with `PyImport_AppendInittab`, I can register the full dotted name "PySide6.QtCore" directly, and CPython's import system will handle it correctly as long as the parent "PySide6" package exists somewhere in the Pytho  …
Fable
Let me check the typesystem package name and PySide6 `__init__.py`, and whether module imports use dotted names.
Fable
⚙ Bash {"command": "head -20 /tmp/pyside-setup/sources/pyside6/PySide6/QtCore/typesystem_core_common.xml | grep -i package; echo \"=== package attr in core ===\"; grep -m3 \"package=\" /tmp/pyside-setup/sources/pyside6/PySide6/QtCore/typesystem_co…
tool result
<typesystem package="PySide6.QtCore">
=== package attr in core ===
<typesystem package="PySide6.QtCore"
=== PySide6 __init__.py ===
/tmp/pyside-setup/sources/pyside6/PySide6/__init__.py.in
Fable
⚙ Bash {"command": "cat /tmp/pyside-setup/sources/pyside6/PySide6/__init__.py.in", "description": "Show PySide6 __init__.py.in"}
tool result
import os
import sys
from pathlib import Path
from types import ModuleType
# mypy: disable-error-code="name-defined"

# __all__ is computed below.
__pre_all__ = [@init_modules@]
__version__ = "@FINAL_PACKAGE_VERSION@"
__version_info__ = (@BINDING_API_MAJOR_VERSION@, @BINDING_API_MINOR_VERSION@, @BINDING_API_MICRO_VERSION@, "@BINDING_API_PRE_RELEASE_VERSION_TYPE@", "@BINDING_API_PRE_RELEASE_VERSION@")

SKIP_MYPY_TEST = bool("@SKIP_MYPY_TEST@")


def _additional_dll_directories(package_dir):
    #  …[truncated]
Fable
thinking
The default PySide6 initialization imports Shiboken and sets up Qt directories, but for a WebAssembly static build we need a minimal version that doesn't depend on filesystem DLL lookups. I'm creating a stripped-down __init__.py that handles the shiboken6 package import—which wraps the Shiboken C-extension—without those filesystem dependencies.

Now I need to examine how the Shiboken C module's PyInit function is structured and ensure both the shiboken6 package and libpyside support library are properly configured for static linking, including registering PyInit_Shiboken.
Fable
Let me examine the shiboken Python module and libpyside.
Fable
⚙ Bash {"command": "echo \"=== shibokenmodule ===\"; ls -R /tmp/pyside-setup/sources/shiboken6/shibokenmodule 2>&1 | head -40; echo \"=== libpyside ===\"; ls /tmp/pyside-setup/sources/pyside6/libpyside 2>&1 | head -40", "description": "List shibok…
tool result
=== shibokenmodule ===
/tmp/pyside-setup/sources/shiboken6/shibokenmodule:
CMakeLists.txt
Shiboken.pyi
__init__.py.in
_config.py.in
files.dir
nothing.h
py.typed.in
shibokenmodule.cpp
shibokenmodule.txt.in
typesystem_shiboken.xml

/tmp/pyside-setup/sources/shiboken6/shibokenmodule/files.dir:
shibokensupport

/tmp/pyside-setup/sources/shiboken6/shibokenmodule/files.dir/shibokensupport:
__init__.py
feature.py
shibokensupport.pyproject
signature

/tmp/pyside-setup/sources/shiboken6/shibokenmodule/fi  …[truncated]
Fable
⚙ Bash {"command": "cat /tmp/pyside-setup/sources/shiboken6/shibokenmodule/__init__.py.in; echo \"=== shibokenmodule.cpp PyInit ===\"; grep -n \"PyInit\\|moduleName\\|Shiboken\" /tmp/pyside-setup/sources/shiboken6/shibokenmodule/shibokenmodule.cpp…
tool result
__version__ = "@FINAL_PACKAGE_VERSION@"
__version_info__ = (@shiboken_MAJOR_VERSION@, @shiboken_MINOR_VERSION@, @shiboken_MICRO_VERSION@, "@shiboken_PRE_RELEASE_VERSION_TYPE@", "@shiboken_PRE_RELEASE_VERSION@")
__minimum_python_version__ = @MINIMUM_PYTHON_VERSION@
__maximum_python_version__ = @MAXIMUM_PYTHON_VERSION@

# PYSIDE-932: Python 2 cannot import 'zipfile' for embedding while being imported, itself.
# We simply pre-load all imports for the signature extension.
# Also, PyInstaller seems n  …[truncated]
Fable
thinking
I'm working through how the Shiboken module gets registered — the C-extension is named "Shiboken" with PyInit_Shiboken as the entry point, and it's imported through shiboken6.Shiboken via the package's __init__.py. For the static POC, I need to register PyInit_Shiboken as "shiboken6.Shiboken" in inittab and provide the shiboken6/__init__.py file on the Python path, though I'm realizing there might be something missing in how shibokenmodule.cpp handles this.
Fable
⚙ Bash {"command": "sed -n '1,120p' /tmp/pyside-setup/sources/shiboken6/shibokenmodule/CMakeLists.txt", "description": "Show shibokenmodule CMakeLists"}
tool result
# Copyright (C) 2023 The Qt Company Ltd.
# SPDX-License-Identifier: BSD-3-Clause

project(shibokenmodule)

configure_file("${CMAKE_CURRENT_SOURCE_DIR}/shibokenmodule.txt.in"
               "${CMAKE_CURRENT_BINARY_DIR}/shibokenmodule.txt" @ONLY)

set(sample_SRC ${CMAKE_CURRENT_BINARY_DIR}/Shiboken/shiboken_module_wrapper.cpp)

set(shibokenmodule_TYPESYSTEM ${CMAKE_CURRENT_SOURCE_DIR}/typesystem_shiboken.xml)

shiboken_get_tool_shell_wrapper(shiboken tool_wrapper)

add_custom_command(
    OUTPUT "  …[truncated]
Fable
thinking
I need to verify whether the shiboken generator is already built on the host system and check the FreeCAD build's Qt configuration, plus review what the other sibling agent directories are handling to avoid duplicating work on typesystem-nothread and fc-pyside-usage. I should also confirm the import mechanism for dotted modules.

I'm checking whether PyImport_AppendInittab can handle dotted names and verifying how FreeCAD packages Python modules into the wasm filesystem through the Ext directory and zip file, then examining the emscripten preload setup.
Fable
Let me check the host shiboken availability, the FreeCAD wasm Python packaging, and the Qt wasm QtCore headers.
Fable
⚙ Bash {"command": "echo \"=== host pyside build present? ===\"; find /tmp/pyside-setup -name \"shiboken6\" -type f 2>/dev/null | head; find / -name \"shiboken6\" -type f 2>/dev/null | grep -v proc | head; which shiboken6 2>/dev/null; echo \"=== p…
tool result
=== host pyside build present? ===
=== pip pyside/shiboken ===
Traceback (most recent call last):
Fable
⚙ Bash {"command": "echo \"=== wasm Qt QtCore headers ===\"; ls /opt/toolchains/qt-asyncify/6.11.1/wasm_singlethread/include/QtCore 2>/dev/null | head; echo \"=== qobject.h present ===\"; ls /opt/toolchains/qt-asyncify/6.11.1/wasm_singlethread/inc…
tool result
=== wasm Qt QtCore headers ===
6.11.1
QAbstractAnimation
QAbstractEventDispatcher
QAbstractEventDispatcherV2
QAbstractItemModel
QAbstractListModel
QAbstractNativeEventFilter
QAbstractProxyModel
QAbstractTableModel
QAnimationDriver
=== qobject.h present ===
/opt/toolchains/qt-asyncify/6.11.1/wasm_singlethread/include/QtCore/qobject.h
=== host Qt ===
/opt/toolchains/qt/6.11.1/gcc_64/include/QtCore/qobject.h
Fable
⚙ Bash {"command": "echo \"=== how freecad ships python to wasm ===\"; grep -rn \"python3.14.zip\\|preload\\|--preload-file\\|Ext\\|packages\\|site-packages\\|PYTHONPATH\\|python-wasm\" /home/magik6k/lcad-wasm/freecad-port/FreeCAD/src/Main/CMakeLi…
tool result
=== how freecad ships python to wasm ===
/home/magik6k/lcad-wasm/freecad-port/FreeCAD/src/Main/CMakeLists.txt:84:        "Extra static archives appended to the FreeCAD wasm links")
Fable
⚙ Bash {"command": "grep -rn \"preload\\|--preload-file\\|python3.14\\|\\.zip\\|PYTHONPATH\\|PYTHONHOME\\|Py_SetPath\\|packages\\|Ext\" /home/magik6k/lcad-wasm/freecad-port/FreeCAD/src/Main/*.cpp | head -30", "description": "Find python path setup…
tool result
/home/magik6k/lcad-wasm/freecad-port/FreeCAD/src/Main/MainCmd.cpp:86:    const char* py_home = getenv("PYTHONHOME");
/home/magik6k/lcad-wasm/freecad-port/FreeCAD/src/Main/MainCmd.cpp:88:        _putenv_s("PYTHONHOME", mingw_prefix);
/home/magik6k/lcad-wasm/freecad-port/FreeCAD/src/Main/MainCmd.cpp:136:        const char* pythonhome = getenv("PYTHONHOME");
/home/magik6k/lcad-wasm/freecad-port/FreeCAD/src/Main/MainCmd.cpp:138:            std::cout << "\nThe environment variable PYTHONHOME is se  …[truncated]
Fable
⚙ Bash {"command": "grep -rln \"preload-file\\|python3.14.zip\\|python-wasm\\|\\.data\\b\" /home/magik6k/lcad-wasm/freecad-port/FreeCAD/ /opt/toolchains/src/freecad-gui-build/ 2>/dev/null | grep -iv \"\\.o$\" | head; echo \"=== emscripten data pac…
tool result
/home/magik6k/lcad-wasm/freecad-port/FreeCAD/package/rattler-build/osx/Info.plist.template
/home/magik6k/lcad-wasm/freecad-port/FreeCAD/src/3rdParty/3Dconnexion/inc/SpaceMouse/CActionInput.hpp
/home/magik6k/lcad-wasm/freecad-port/FreeCAD/src/3rdParty/3Dconnexion/inc/SpaceMouse/CImage.hpp
/home/magik6k/lcad-wasm/freecad-port/FreeCAD/src/3rdParty/3Dconnexion/inc/SpaceMouse/CNavlibInterface.hpp
/home/magik6k/lcad-wasm/freecad-port/FreeCAD/src/3rdParty/3Dconnexion/inc/SpaceMouse/CNavigation3D.hpp
/h  …[truncated]
Fable
thinking
I need to trace through how FreeCAD's wasm build handles the Python filesystem—checking the bin directory structure, how Python's home path gets configured, and looking at the MainGui.cpp setup for wasm-specific Python initialization, plus any test harness that might be available.
Fable
⚙ Bash {"command": "ls -la /opt/toolchains/src/freecad-gui-build/bin/ 2>/dev/null; echo \"=== data files ===\"; find /opt/toolchains/src/freecad-gui-build -maxdepth 2 -name \"*.data\" 2>/dev/null; find /opt/toolchains/src/freecad-gui-build -name \…
tool result
total 201188
drwxr-xr-x  2 agent agent      4096 Jul  5 12:02 .
drwxr-xr-x 11 agent agent      4096 Jul  5 12:02 ..
-rw-r--r--  1 agent agent    539518 Jul  5 12:02 FreeCAD.js
-rwxr-xr-x  1 agent agent 205460106 Jul  5 12:02 FreeCAD.wasm
=== data files ===
=== node test harness ===
/home/magik6k/lcad-wasm/boot-test.mjs
/home/magik6k/lcad-wasm/boot-test2.mjs
/home/magik6k/lcad-wasm/pytest.mjs
/home/magik6k/lcad-wasm/bootshot.mjs
/home/magik6k/lcad-wasm/vptest.mjs
/home/magik6k/lcad-wasm/uinew.mjs  …[truncated]
Fable
Let me look at how the existing test harness loads FreeCAD and runs python, plus how the python filesystem is provided.
Fable
⚙ Bash {"command": "cat /home/magik6k/lcad-wasm/pytest.mjs", "description": "Show pytest harness"}
tool result
import { chromium } from 'playwright';
import http from 'http'; import fs from 'fs'; import path from 'path';
const DIR='/home/magik6k/lcad-wasm/freecad-port/deploy-gui';
const mime={'.js':'text/javascript','.wasm':'application/wasm','.html':'text/html','.data':'application/octet-stream'};
const srv=http.createServer((q,r)=>{let f=path.join(DIR,q.url==='/'?'index-pytest.html':decodeURIComponent(q.url.split('?')[0]));fs.readFile(f,(e,d)=>{if(e){r.writeHead(404);r.end();return;}r.writeHead(200,{'C  …[truncated]
Fable
⚙ Bash {"command": "ls /home/magik6k/lcad-wasm/freecad-port/deploy-gui/ 2>/dev/null | head -30; echo \"=== index-pytest.html ===\"; cat /home/magik6k/lcad-wasm/freecad-port/deploy-gui/index-pytest.html 2>/dev/null | head -80", "description": "Show…
tool result
FreeCAD.js
FreeCAD.wasm
boot-async.png
boxrender.png
br-newdoc.png
freecad.data
freecad.data.js
full-boot.png
full-orbit.png
index-boot.html
index-pytest.html
index-viewport.html
index-vp2.html
index-vpgui.html
index.html
nw-0-boot.png
nw-1-filemenu.png
nw-2-afternew.png
nw-3-afterenter.png
nw-4-orbit.png
screenshot.png
ui-after.png
ui-before.png
ui-filemenu.png
vg-2.png
vg-4.png
vg-8.png
vg-resize.png
vg-resize2.png
viewport.png
=== index-pytest.html ===
<!DOCTYPE html><html><head><meta charset  …[truncated]
Fable
thinking
I see that freecad.data is an emscripten preloaded file containing a Python zip archive and additional directories, with the PYTHONPATH configured to include both the zip and the `/python` directory. I need to examine how freecad.data is generated to figure out where to inject the PySide6 and shiboken6 package files.
Fable
⚙ Bash {"command": "echo \"=== freecad.data.js head ===\"; head -c 2000 /home/magik6k/lcad-wasm/freecad-port/deploy-gui/freecad.data.js; echo; echo \"=== how data built ===\"; find /home/magik6k/lcad-wasm -maxdepth 2 -name \"*.sh\" 2>/dev/null | h…
tool result
=== freecad.data.js head ===

  var Module = typeof Module != 'undefined' ? Module : {};

  Module['expectedDataFileDownloads'] ??= 0;
  Module['expectedDataFileDownloads']++;
  (() => {
    // Do not attempt to redownload the virtual filesystem data when in a pthread or a Wasm Worker context.
    var isPthread = typeof ENVIRONMENT_IS_PTHREAD != 'undefined' && ENVIRONMENT_IS_PTHREAD;
    var isWasmWorker = typeof ENVIRONMENT_IS_WASM_WORKER != 'undefined' && ENVIRONMENT_IS_WASM_WORKER;
    if (is  …[truncated]
Fable
⚙ Bash {"command": "cat /home/magik6k/lcad-wasm/pack-mods.sh", "description": "Show pack-mods.sh"}
tool result
#!/usr/bin/env bash
# Build a supplementary emscripten preload package containing the Python trees
# of FreeCAD modules that were enabled AFTER the base freecad.data was built.
# Icons/.ui are compiled into the *Gui.a via qrc, so only .py (+ small runtime
# data) need to ship in the FS. Mounts into /freecad/Mod/<Module>/.
#
# Usage: pack-mods.sh Mod1 Mod2 ...   (module dir names under src/Mod)
set -euo pipefail

SRC=/home/magik6k/lcad-wasm/freecad-port/FreeCAD/src/Mod
DEPLOY=/home/magik6k/lcad-w  …[truncated]
Fable
thinking
I have enough context now to draft the POC plan. Let me verify a few critical details: whether shiboken6 can be built for the host system, and confirm the build strategy of compiling shiboken6 (both the library and generator) for the host machine first, then using that generator to create bindings for the target.

For the reduced typesystem, I'm weighing two approaches: either create a minimal typesystem with just QObject and QString, or use the full typesystem_core.xml but selectively mark classes with generate="yes" or "no" to control what gets bound. The challenge is that QObject references many types, so a truly minimal binding requires careful selection. I'm also considering whether to   …
Fable
Let me check shiboken's own test bindings (minimal/sample) which are ideal for milestone 0, and the global.h mechanism.
Fable
⚙ Bash {"command": "ls /tmp/pyside-setup/sources/shiboken6/tests/ 2>/dev/null; echo \"=== minimal ===\"; ls /tmp/pyside-setup/sources/shiboken6/tests/minimalbinding 2>/dev/null | head -40", "description": "List shiboken test bindings"}
tool result
CMakeLists.txt
libminimal
libother
libsample
libsmart
minimalbinding
otherbinding
samplebinding
shiboken_paths.py
shiboken_test_helper.py
shibokenmodule
smartbinding
=== minimal ===
CMakeLists.txt
brace_pattern_test.py
containeruser_test.py
global.h
listuser_test.py
minbool_test.py
minimal-binding.txt.in
minimalbinding.pyproject
obj_test.py
spanuser_test.py
typedef_test.py
typesystem_minimal.xml
val_test.py
Fable
⚙ Bash {"command": "echo \"=== minimal global.h ===\"; cat /tmp/pyside-setup/sources/shiboken6/tests/minimalbinding/global.h; echo \"=== typesystem_minimal.xml ===\"; cat /tmp/pyside-setup/sources/shiboken6/tests/minimalbinding/typesystem_minimal.…
tool result
=== minimal global.h ===
// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0

#include "obj.h"
#include "containeruser.h"
#include "val.h"
#include "minbool.h"
#include "listuser.h"
#include "spanuser.h"
#include "typedef.h"
#include "invisiblenamespace.h"
=== typesystem_minimal.xml ===
<?xml version="1.0" encoding="UTF-8"?>
<typesystem package="minimal">

    <primitive-type name="MinBool" target-lang-api-name=  …[truncated]
Fable
thinking
A minimal shiboken binding without Qt is the right approach for this first milestone—it generates PyInit_minimal and lets me validate the whole stack: shiboken runtime, CPython 3.14, emscripten, asyncify, and the inittab mechanism without the complexity of Qt dependencies. I need to verify whether the FreeCAD build already has libshiboken and libpyside available, and confirm the CPython wasm build includes the necessary headers.

Now I'm checking the emscripten version and reviewing FreeCAD's toolchain configuration to see what compiler flags it's using—specifically asyncify and exception handling—plus looking for any existing FREECAD_USE_PYSIDE or SHIBOKEN options that might already be set.
Fable
Let me verify FreeCAD's compile flags (asyncify/exceptions) and the FREECAD_USE_PYSIDE/SHIBOKEN options and PythonWrapper usage.
Fable
⚙ Bash {"command": "grep -rn \"asyncify\\|ASYNCIFY\\|fexceptions\\|fwasm-exceptions\\|DISABLE_EXCEPTION\" /opt/toolchains/src/freecad-gui-build/CMakeCache.txt 2>/dev/null | head; echo \"=== flags in cache ===\"; grep -iE \"CMAKE_CXX_FLAGS:|CMAKE_C…
tool result
/opt/toolchains/src/freecad-gui-build/CMakeCache.txt:183:CMAKE_CXX_FLAGS:STRING=-fexceptions -DEIGEN_DONT_VECTORIZE -DBOOST_HAS_PTHREADS=1 -DBOOST_STACKTRACE_USE_NOOP
/opt/toolchains/src/freecad-gui-build/CMakeCache.txt:204:CMAKE_C_FLAGS:STRING=-fexceptions -DXML_DEV_URANDOM
/opt/toolchains/src/freecad-gui-build/CMakeCache.txt:246:CMAKE_FIND_ROOT_PATH:UNINITIALIZED=/opt/toolchains/qt-asyncify/6.11.1/wasm_singlethread;/opt/toolchains/occt-wasm;/opt/toolchains/xerces-wasm;/opt/toolchains/fmt-wasm;  …[truncated]
Fable
⚙ Bash {"command": "grep -rn \"FREECAD_USE_PYSIDE\\|FREECAD_USE_SHIBOKEN\\|USE_PYSIDE\\|USE_SHIBOKEN\" /home/magik6k/lcad-wasm/freecad-port/FreeCAD/CMakeLists.txt /home/magik6k/lcad-wasm/freecad-port/FreeCAD/cMake/FreeCAD_Helpers/*.cmake 2>/dev/nu…
tool result
/home/magik6k/lcad-wasm/freecad-port/FreeCAD/cMake/FreeCAD_Helpers/PrintFinalReport.cmake:96:    value(FREECAD_USE_PYSIDE)
/home/magik6k/lcad-wasm/freecad-port/FreeCAD/cMake/FreeCAD_Helpers/PrintFinalReport.cmake:97:    value(FREECAD_USE_SHIBOKEN)
/home/magik6k/lcad-wasm/freecad-port/FreeCAD/cMake/FreeCAD_Helpers/SetupShibokenAndPyside.cmake:4:    option(FREECAD_USE_SHIBOKEN "Links to the shiboken library at build time. If OFF its Python module is imported at runtime" ON)
/home/magik6k/lcad-wasm  …[truncated]
Fable
⚙ Bash {"command": "sed -n '1,170p' /home/magik6k/lcad-wasm/freecad-port/FreeCAD/cMake/FreeCAD_Helpers/SetupShibokenAndPyside.cmake", "description": "Show SetupShibokenAndPyside"}
tool result
macro(SetupShibokenAndPyside)
# -------------------------------- Shiboken/PySide ------------------------

    option(FREECAD_USE_SHIBOKEN "Links to the shiboken library at build time. If OFF its Python module is imported at runtime" ON)
    option(FREECAD_USE_PYSIDE "Links to the PySide libraries at build time." ON)

    if(DEFINED MACPORTS_PREFIX)
        find_package(Shiboken REQUIRED HINTS "${PYTHON_LIBRARY_DIR}/cmake")
        find_package(PySide REQUIRED HINTS "${PYTHON_LIBRARY_DIR}/cmake"  …[truncated]
Fable
thinking
Now I'm examining how PythonWrapper.cpp leverages shiboken's getCppPointer and wrapInstance functions to understand the milestone 3 requirements.
Fable
Let me check PythonWrapper.cpp shiboken usage and getMainWindow, then I have enough to write the plan.
Fable
⚙ Bash {"command": "grep -n \"shiboken\\|Shiboken\\|getCppPointer\\|wrapInstance\\|SbkObject\\|#include\\|getMainWindow\\|SHIBOKEN\\|PYSIDE\" /home/magik6k/lcad-wasm/freecad-port/FreeCAD/src/Gui/PythonWrapper.cpp | head -40", "description": "Show …
tool result
24:#include <limits>
25:#include <unordered_map>
26:#include <list>
27:#include <QAction>
28:#include <QApplication>
29:#include <QDir>
30:#include <QIcon>
31:#include <QPrinter>
32:#include <QWidget>
35:#include <QMetaType>
38:// #undef HAVE_SHIBOKEN2
39:// #undef HAVE_PYSIDE2
40:// #undef HAVE_SHIBOKEN6
41:// #undef HAVE_PYSIDE6
43:#include <FCConfig.h>
69:// shiboken2 and PySide2 specific defines and includes
72:// class and struct used for SbkObject
74:#ifdef HAVE_SHIBOKEN2
  …[truncated]
Fable
⚙ Bash {"command": "bash -l -c 'source /opt/toolchains/emsdk/emsdk_env.sh 2>/dev/null; emcc --version 2>/dev/null | head -1; echo \"python-wasm libs:\"; ls /opt/toolchains/python-wasm/lib/*.a 2>/dev/null | head; echo \"libshiboken headers check - …
tool result
emcc (Emscripten gcc/clang-like replacement + linker emulating GNU ld) 4.0.12 (6f625bd62ee64f4f8cd11476774741b961e4a2d5)
python-wasm libs:
/opt/toolchains/python-wasm/lib/libHacl_Hash_BLAKE2.a
/opt/toolchains/python-wasm/lib/libHacl_Hash_MD5.a
/opt/toolchains/python-wasm/lib/libHacl_Hash_SHA1.a
/opt/toolchains/python-wasm/lib/libHacl_Hash_SHA2.a
/opt/toolchains/python-wasm/lib/libHacl_Hash_SHA3.a
/opt/toolchains/python-wasm/lib/libexpat.a
/opt/toolchains/python-wasm/lib/libffi.a
/opt/toolchains/  …[truncated]
Fable
thinking
I need to verify a few key details for the build configuration: checking that libclang is available at the expected path, confirming the right PySide build flags to isolate just the shiboken6 generator and libshiboken for the host, and determining whether SHIBOKEN_PYTHON_EXTENSION_SUFFIX should be empty for wasm CPython. I'm also looking into python-wasm's configuration to understand how it handles these settings.

Actually, the extension suffix doesn't matter for static inittab registration since we're registering by module name string rather than filename. The minimal binding test is straightforward with no Qt dependencies, which is good. For the asyncify trampoline issue with wasm CPython  …
Fable
Let me confirm exact inittab wiring lines and the module wrapper naming, then write the plan.
Fable
⚙ Bash {"command": "grep -n \"FREECAD_WASM_PY_MODULES\\|FREECAD_WASM_PY_GUI_MODULES\\|FREECAD_WASM_EXTRA_LINK_LIBS\\|freecad_wasm_generate_inittab\\|FREECAD_WASM_EXTRA_PY\" /home/magik6k/lcad-wasm/freecad-port/FreeCAD/src/Main/CMakeLists.txt", "de…
tool result
11:    set(FREECAD_WASM_PY_MODULES "")
12:    set(FREECAD_WASM_PY_GUI_MODULES "")
14:        list(APPEND FREECAD_WASM_PY_MODULES Part)
15:        list(APPEND FREECAD_WASM_PY_GUI_MODULES PartGui)
18:        list(APPEND FREECAD_WASM_PY_MODULES Sketcher)
19:        list(APPEND FREECAD_WASM_PY_GUI_MODULES SketcherGui)
22:        list(APPEND FREECAD_WASM_PY_MODULES PartDesign)
23:        list(APPEND FREECAD_WASM_PY_GUI_MODULES PartDesignGui)
26:        list(APPEND FREECAD_WASM_PY_MODULES Spreadsheet)  …[truncated]
Fable
⚙ Bash {"command": "sed -n '20,42p' /home/magik6k/lcad-wasm/freecad-port/FreeCAD/src/Main/CMakeLists.txt", "description": "Show start of wasm module list block"}
tool result
    endif()
    if(BUILD_PART_DESIGN)
        list(APPEND FREECAD_WASM_PY_MODULES PartDesign)
        list(APPEND FREECAD_WASM_PY_GUI_MODULES PartDesignGui)
    endif()
    if(BUILD_SPREADSHEET)
        list(APPEND FREECAD_WASM_PY_MODULES Spreadsheet)
        list(APPEND FREECAD_WASM_PY_GUI_MODULES SpreadsheetGui)
    endif()
    if(BUILD_MATERIAL)
        list(APPEND FREECAD_WASM_PY_MODULES Materials)
        list(APPEND FREECAD_WASM_PY_GUI_MODULES MatGui)
    endif()
    if(BUILD_MEASURE)
      …[truncated]
Fable
thinking
I need to double-check the module wrapper filename and how it relates to the SHIBOKEN_PYTHON_EXTENSION_SUFFIX setting, particularly whether the generated file uses the lowercase qtcore or capitalized QtCore naming convention.
Fable
⚙ Bash {"command": "grep -n \"module_wrapper\" /tmp/pyside-setup/sources/pyside6/PySide6/QtCore/CMakeLists.txt; echo \"=== does host toolchain have libclang for generator ===\"; ls /usr/lib/llvm-21/lib/libclang.so 2>/dev/null; echo \"=== requireme…
tool result
207:${QtCore_GEN_DIR}/qtcore_module_wrapper.cpp
=== does host toolchain have libclang for generator ===
/usr/lib/llvm-21/lib/libclang.so
=== requirements for build ===
patchelf==0.17.2; sys_platform == 'linux'
# 2.2.0 is the last version that supports Python 3.10
numpy==2.2.0; python_version == '3.10'
numpy==2.4.6; python_version > '3.10'
Fable
I have everything needed. Let me write the plan and supporting patch/config files.
Fable
⚙ Bash {"command": "mkdir -p /home/magik6k/lcad-wasm/pyside-port/poc-minimal/files", "description": "Create poc-minimal dir"}
tool result
(Bash completed with no output)
Fable
thinking
I'm starting to outline the supporting files I need to create for this minimal PySide6 WASM setup—a reduced QtCore typesystem definition, a global header for shiboken, a minimal package initialization, and the shiboken configuration.

I also need to think through the typesystem carefully. For a minimal QObject binding, I could either expose all public methods or selectively remove ones I don't need. The tricky part is handling dependencies like QThread, which QObject references through methods like thread() and moveToThread(). I should note how the thread-related types are handled, possibly referencing the existing qt-nothread-typesystem approach for guidance on this POC.

For the actual min  …
Fable
Now I'll write the supporting files and the plan.
Fable
⚙ Write {"file_path": "/home/magik6k/lcad-wasm/pyside-port/poc-minimal/files/typesystem_QtCore_minimal.xml", "content": "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<!--\n Milestone-1 REDUCED QtCore typesystem for the wasm PoC.\n Package MUST be …
tool result
File created successfully at: /home/magik6k/lcad-wasm/pyside-port/poc-minimal/files/typesystem_QtCore_minimal.xml (file state is current in your context — no need to Read it back)
Fable
⚙ Write {"file_path": "/home/magik6k/lcad-wasm/pyside-port/poc-minimal/files/QtCore_minimal_global.h", "content": "// Milestone-1 global header fed to shiboken for the reduced QtCore binding.\n// shiboken parses this with libclang (host) to build i…
tool result
File created successfully at: /home/magik6k/lcad-wasm/pyside-port/poc-minimal/files/QtCore_minimal_global.h (file state is current in your context — no need to Read it back)
Fable
⚙ Write {"file_path": "/home/magik6k/lcad-wasm/pyside-port/poc-minimal/files/PySide6__init__.py", "content": "# Minimal PySide6 package __init__ for the wasm static PoC.\n#\n# The upstream __init__.py (sources/pyside6/PySide6/__init__.py.in) does\n…
tool result
File created successfully at: /home/magik6k/lcad-wasm/pyside-port/poc-minimal/files/PySide6__init__.py (file state is current in your context — no need to Read it back)
Fable
⚙ Write {"file_path": "/home/magik6k/lcad-wasm/pyside-port/poc-minimal/files/shiboken6__init__.py", "content": "# Minimal shiboken6 package __init__ for the wasm static PoC.\n#\n# Upstream (sources/shiboken6/shibokenmodule/__init__.py.in) ends with…
tool result
File created successfully at: /home/magik6k/lcad-wasm/pyside-port/poc-minimal/files/shiboken6__init__.py (file state is current in your context — no need to Read it back)
Fable
Now the CMake patch to let FreeCAD register extra static Python modules in the inittab.
Fable
⚙ Write {"file_path": "/home/magik6k/lcad-wasm/pyside-port/poc-minimal/files/Main_CMakeLists.inittab.patch", "content": "--- a/src/Main/CMakeLists.txt\n+++ b/src/Main/CMakeLists.txt\n@@ -77,10 +77,25 @@\n endfunction()\n+ # PoC hook: extra s…
tool result
File created successfully at: /home/magik6k/lcad-wasm/pyside-port/poc-minimal/files/Main_CMakeLists.inittab.patch (file state is current in your context — no need to Read it back)
Fable
thinking
I'm thinking through how to simplify the patch for handling module registration syntax. Instead of making the generate function parse "RegName=CInit" entries, I could modify it to accept extra modules where the registration name matches the initialization function, allowing dotted names like "PySide6.QtCore" to work properly.
Fable
Let me refine the patch so the inittab generator itself understands the `RegName=CInitName` form.
Fable
⚙ Write {"file_path": "/home/magik6k/lcad-wasm/pyside-port/poc-minimal/files/Main_CMakeLists.inittab.patch", "content": "--- a/src/Main/CMakeLists.txt\n+++ b/src/Main/CMakeLists.txt\n@@ freecad_wasm_generate_inittab function @@\n function(freec…
tool result
The file /home/magik6k/lcad-wasm/pyside-port/poc-minimal/files/Main_CMakeLists.inittab.patch has been updated successfully. (file state is current in your context — no need to Read it back)
Fable
Now the build scripts and test startup files.
Fable
⚙ Write {"file_path": "/home/magik6k/lcad-wasm/pyside-port/poc-minimal/files/00-build-host-shiboken.sh", "content": "#!/usr/bin/env bash\n# Build the HOST shiboken6 generator + libshiboken (x86-64). We need:\n# - the shiboken6 GENERATOR binary (r…
tool result
File created successfully at: /home/magik6k/lcad-wasm/pyside-port/poc-minimal/files/00-build-host-shiboken.sh (file state is current in your context — no need to Read it back)
Fable
⚙ Write {"file_path": "/home/magik6k/lcad-wasm/pyside-port/poc-minimal/files/10-gen-and-build-m0-minimal.sh", "content": "#!/usr/bin/env bash\n# MILESTONE 0: shiboken 'minimal' test binding (pure C++, NO Qt).\n# Proves the shiboken RUNTIME (libshib…
tool result
File created successfully at: /home/magik6k/lcad-wasm/pyside-port/poc-minimal/files/10-gen-and-build-m0-minimal.sh (file state is current in your context — no need to Read it back)
Fable
⚙ Write {"file_path": "/home/magik6k/lcad-wasm/pyside-port/poc-minimal/files/20-gen-and-build-m1-qtcore.sh", "content": "#!/usr/bin/env bash\n# MILESTONE 1: reduced QtCore binding (QObject only) against the wasm asyncify Qt.\n# Proves shiboken can …
tool result
File created successfully at: /home/magik6k/lcad-wasm/pyside-port/poc-minimal/files/20-gen-and-build-m1-qtcore.sh (file state is current in your context — no need to Read it back)
Fable
⚙ Write {"file_path": "/home/magik6k/lcad-wasm/pyside-port/poc-minimal/files/startup-m0.py", "content": "# M0 pass/fail test - runs inside FreeCAD wasm via the pytest.mjs harness.\n# PASS criterion: prints \"M0_PASS ...\". Any exception -> harness …
tool result
File created successfully at: /home/magik6k/lcad-wasm/pyside-port/poc-minimal/files/startup-m0.py (file state is current in your context — no need to Read it back)
Fable
⚙ Write {"file_path": "/home/magik6k/lcad-wasm/pyside-port/poc-minimal/files/startup-m1.py", "content": "# M1 pass/fail test - the keystone assertion for the whole PySide port.\n# PASS criterion: prints \"M1_PASS ...\".\nimport FreeCAD as App\nApp.…
tool result
File created successfully at: /home/magik6k/lcad-wasm/pyside-port/poc-minimal/files/startup-m1.py (file state is current in your context — no need to Read it back)
Fable
⚙ Write {"file_path": "/home/magik6k/lcad-wasm/pyside-port/poc-minimal/files/index-poc.html", "content": "<!DOCTYPE html><html><head><meta charset=\"utf-8\"><title>PySide PoC</title></head>\n<body><div id=\"screen\" style=\"position:absolute;inset:…
tool result
File created successfully at: /home/magik6k/lcad-wasm/pyside-port/poc-minimal/files/index-poc.html (file state is current in your context — no need to Read it back)
Fable
thinking
I'm working through the FreeCAD relink process now—setting up a helper script that references the build directory and figuring out how to add the archives and inittab entries. I need to check if there's already a ninja target for relinking in the build directory at /opt/toolchains/src/freecad-gui-build, and then I'll reconfigure with the cache variables for extra link libraries and Python modules before rebuilding.
Fable
⚙ Write {"file_path": "/home/magik6k/lcad-wasm/pyside-port/poc-minimal/files/30-relink-freecad.sh", "content": "#!/usr/bin/env bash\n# Relink FreeCAD.wasm with the PoC binding archives added to the inittab.\n# Prereq: apply files/Main_CMakeLists.in…
tool result
File created successfully at: /home/magik6k/lcad-wasm/pyside-port/poc-minimal/files/30-relink-freecad.sh (file state is current in your context — no need to Read it back)
Fable
thinking
Let me try building the host shiboken generator to validate this approach and see what actual output we get—at least running the cmake configure step to check if it's viable. First, I should verify whether the shiboken host build has heavy dependencies before committing to a full build.
Fable
Let me attempt the host shiboken generator build to capture real output and validate the plan.
Fable
⚙ Bash {"command": "cd /tmp && export LLVM_INSTALL_DIR=/usr/lib/llvm-21 CLANG_INSTALL_DIR=/usr/lib/llvm-21; timeout 300 cmake -G Ninja -S /tmp/pyside-setup/sources/shiboken6 -B /home/magik6k/lcad-wasm/pyside-port/build/shiboken-host -DCMAKE_BUILD_…
tool result
-- The C compiler identification is GNU 15.2.0
-- The CXX compiler identification is GNU 15.2.0
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working C compiler: /usr/bin/cc - skipped
-- Detecting C compile features
-- Detecting C compile features - done
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: /usr/bin/c++ - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features -   …[truncated]
Fable
thinking
The shiboken build requires the host Qt6 installation since the generator itself depends on Qt (specifically QtCore for the ApiExtractor's Qt containers), so I need to point CMAKE_PREFIX_PATH to the host Qt at /opt/toolchains/qt/6.11.1/gcc_64 and retry the build.
Fable
⚙ Bash {"command": "cd /tmp && export LLVM_INSTALL_DIR=/usr/lib/llvm-21 CLANG_INSTALL_DIR=/usr/lib/llvm-21; timeout 300 cmake -G Ninja -S /tmp/pyside-setup/sources/shiboken6 -B /home/magik6k/lcad-wasm/pyside-port/build/shiboken-host -DCMAKE_BUILD_…
tool result
  sphinx-build - not found! doc target disabled


-- Configuring done (1.3s)
CMake Error at shibokenmodule/CMakeLists.txt:15 (add_custom_command):
  Error evaluating generator expression:

    $<TARGET_FILE:Shiboken6::shiboken6>

  No target "Shiboken6::shiboken6"


CMake Error at shibokenmodule/CMakeLists.txt:15 (add_custom_command):
  Error evaluating generator expression:

    $<TARGET_FILE:Shiboken6::shiboken6>

  No target "Shiboken6::shiboken6"


CMake Error at shibokenmodule/CMakeLists.tx  …[truncated]
Fable
thinking
The shibokenmodule subdirectory is trying to use a generator that hasn't been built yet because the `Shiboken6::shiboken6` imported target doesn't exist. The top-level CMakeLists builds the generator first, then shibokenmodule should reference it via that imported target, but the alias isn't being created in this build configuration. In a normal in-tree build, the generator target is named `shiboken6` and should have an alias `Shiboken6::shiboken6` pointing to it.

The issue might be that building the generator is gated behind a flag, or the module build is being triggered before the generator target is properly exported. I could either disable the shibokenmodule subdirectory entirely, use t  …
Fable
⚙ Bash {"command": "grep -n \"add_subdirectory\\|Shiboken6::shiboken6\\|add_executable(shiboken6\\|ALIAS\\|option(\" /tmp/pyside-setup/sources/shiboken6/CMakeLists.txt | head -30; echo \"=== generator alias ===\"; grep -rn \"Shiboken6::shiboken6\\…
tool result
20:add_subdirectory(libshiboken) # Uses Python
21:add_subdirectory(shibokenmodule) # Uses libshiboken
22:add_subdirectory(data)
24:add_subdirectory(doc)
28:    add_subdirectory(tests)
=== generator alias ===
/tmp/pyside-setup/sources/shiboken6_generator/generator/CMakeLists.txt:36:add_executable(shiboken6 ${shiboken6_SRC})
/tmp/pyside-setup/sources/shiboken6_generator/generator/CMakeLists.txt:37:add_executable(Shiboken6::shiboken6 ALIAS shiboken6)
/tmp/pyside-setup/sources/shiboken6_generator/da  …[truncated]
Fable
thinking
The shiboken6 generator lives in its own source directory separate from the main library code. The build process needs to happen in two stages: first compile the generator from `sources/shiboken6_generator` to produce the executable and the Shiboken6Tools package, then build `sources/shiboken6` which contains libshiboken and the module, since it depends on finding the generator through that package.
Fable
The generator is a separate source dir. Let me build `shiboken6_generator`.
Fable
⚙ Bash {"command": "sed -n '1,40p' /tmp/pyside-setup/sources/shiboken6_generator/CMakeLists.txt | grep -n \"add_subdirectory\\|find_package\\|project\\|option\" ", "description": "Inspect generator CMake top"}
tool result
7:project(shiboken_generator)
17:add_subdirectory(ApiExtractor) # Uses libclang
18:add_subdirectory(generator) # Uses ApiExtractor And QtCore
22:    add_subdirectory(tests)
Fable
⚙ Bash {"command": "cd /tmp && export LLVM_INSTALL_DIR=/usr/lib/llvm-21 CLANG_INSTALL_DIR=/usr/lib/llvm-21 LLVM_CONFIG=/usr/lib/llvm-21/bin/llvm-config; timeout 300 cmake -G Ninja -S /tmp/pyside-setup/sources/shiboken6_generator -B /home/magik6k/l…
tool result
-- Could NOT find LibEdit (missing: LibEdit_INCLUDE_DIRS LibEdit_LIBRARIES) 
-- Found ZLIB: /usr/lib/x86_64-linux-gnu/libz.so (found version "1.3.1")
-- Could NOT find zstd (missing: zstd_LIBRARY zstd_INCLUDE_DIR) 
-- Found LibXml2: /usr/lib/x86_64-linux-gnu/libxml2.so (found version "2.15.2")
-- Could NOT find CURL (missing: CURL_LIBRARY CURL_INCLUDE_DIR) 
-- CLANG: /usr/lib/llvm-21/lib/cmake/clang, /usr/lib/llvm-21/lib/libclang-21.so.21 detected
-- Found Git: /usr/bin/git (found version "2.53.  …[truncated]
Fable
Configure succeeded. Let me build the generator binary.
Fable
⚙ Bash {"command": "export LLVM_INSTALL_DIR=/usr/lib/llvm-21 CLANG_INSTALL_DIR=/usr/lib/llvm-21; timeout 590 cmake --build /home/magik6k/lcad-wasm/pyside-port/build/shiboken-gen --target shiboken6 2>&1 | tail -20", "description": "Build shiboken6 …
tool result
[53/72] Building CXX object ApiExtractor/CMakeFiles/apiextractor.dir/typesystemparser.cpp.o
[54/72] Building CXX object ApiExtractor/CMakeFiles/apiextractor.dir/abstractmetabuilder.cpp.o
[55/72] Linking CXX static library ApiExtractor/libapiextractor.a
[56/72] Automatic MOC for target shiboken6
[57/72] Building CXX object generator/CMakeFiles/shiboken6.dir/shiboken6_autogen/mocs_compilation.cpp.o
[58/72] Building CXX object generator/CMakeFiles/shiboken6.dir/defaultvalue.cpp.o
[59/72] Building C  …[truncated]
Fable
The generator built. Let me verify it runs and generate the M0 minimal binding to validate the pipeline.
Fable
⚙ Bash {"command": "GEN=/home/magik6k/lcad-wasm/pyside-port/build/shiboken-gen/generator/shiboken6; $GEN --version 2>&1 | head -5; echo \"=== exists ===\"; ls -la $GEN", "description": "Verify generator runs"}
tool result
shiboken v6.11.0
Copyright (C) 2016 The Qt Company Ltd.
=== exists ===
-rwxr-xr-x 1 agent agent 4730280 Jul  5 12:46 /home/magik6k/lcad-wasm/pyside-port/build/shiboken-gen/generator/shiboken6
Fable
Now let me run the M0 minimal generation to validate the generate step end-to-end.
Fable
⚙ Bash {"command": "GEN=/home/magik6k/lcad-wasm/pyside-port/build/shiboken-gen/generator/shiboken6\nSHIB=/tmp/pyside-setup/sources/shiboken6\nOUT=/home/magik6k/lcad-wasm/pyside-port/build/m0-minimal\nmkdir -p \"$OUT/gen\"\n$GEN --generator-set=shi…
tool result
qt.shiboken: (minimal) CLANG v21/0.64 targeting "x86_64-pc-linux-gnu"/gnu, 64bit.
(minimal)  [112ms] Generated class model (7).                                  [OK]
(minimal)  [112ms] Generated enum model (0).                                   [OK]
(minimal)  [112ms] Generated namespace model (1).                              [OK]
(minimal)  [112ms] Resolved typedefs (2).                                      [OK]
(minimal)  [112ms] Fixed class inherit  …[truncated]
Fable
Generation works. Let me verify the PyInit symbol and try compiling one wrapper for wasm to validate the cross-compile step.
Fable
⚙ Bash {"command": "OUT=/home/magik6k/lcad-wasm/pyside-port/build/m0-minimal\ngrep -n \"PyInit_minimal\" \"$OUT/gen/minimal/minimal_module_wrapper.cpp\" | head\necho \"=== try wasm compile of module wrapper + libshiboken header availability ===\"\…
tool result
Exit code 2
1223:extern "C" LIBSHIBOKEN_EXPORT PyObject *PyInit_minimal()
=== try wasm compile of module wrapper + libshiboken header availability ===
In file included from /home/magik6k/lcad-wasm/pyside-port/build/m0-minimal/gen/minimal/obj_wrapper.cpp:4:
/tmp/pyside-setup/sources/shiboken6/libshiboken/sbkpep.h:8:10: fatal error: 'sbkversion.h' file not found
    8 | #include "sbkversion.h"
      |          ^~~~~~~~~~~~~~
1 error generated.
exit: 0
ls: cannot access '/tmp/obj_wrapper.o': No suc  …[truncated]
Fable
thinking
I see that `sbkversion.h` is a generated header created by CMake from a template, so I'll need to build or at least configure libshiboken to generate it along with other headers like `shibokenmacros.h`.
Fable
`sbkversion.h` is generated by libshiboken's CMake. Let me find the generated-header inputs and configure libshiboken for wasm.
Fable
⚙ Bash {"command": "ls /tmp/pyside-setup/sources/shiboken6/libshiboken/*.in; echo \"=== grep configure_file ===\"; grep -n \"configure_file\\|sbkversion\\|embedding_generator\\|EMBEDDING\" /tmp/pyside-setup/sources/shiboken6/libshiboken/CMakeLists…
tool result
/tmp/pyside-setup/sources/shiboken6/libshiboken/sbkversion.h.in
=== grep configure_file ===
13:configure_file("${CMAKE_CURRENT_SOURCE_DIR}/sbkversion.h.in"
14:               "${CMAKE_CURRENT_BINARY_DIR}/sbkversion.h" @ONLY)
15:configure_file("${CMAKE_CURRENT_SOURCE_DIR}/embed/signature_bootstrap.py"
45:            "${CMAKE_CURRENT_SOURCE_DIR}/embed/embedding_generator.py"
49:    DEPENDS "${CMAKE_CURRENT_SOURCE_DIR}/embed/embedding_generator.py"
131:    target_compile_definitions(libshiboken PRIV  …[truncated]
Fable
⚙ Bash {"command": "cat /tmp/pyside-setup/sources/shiboken6/libshiboken/sbkversion.h.in; echo \"=== embed stuff (signatures) ===\"; sed -n '18,60p' /tmp/pyside-setup/sources/shiboken6/libshiboken/CMakeLists.txt", "description": "Show sbkversion te…
tool result
// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only

#ifndef SBKVERSION_H
#define SBKVERSION_H

#define SHIBOKEN_VERSION "@shiboken_MAJOR_VERSION@.@shiboken_MINOR_VERSION@.@shiboken_MICRO_VERSION@"
#define SHIBOKEN_MAJOR_VERSION @shiboken_MAJOR_VERSION@
#define SHIBOKEN_MINOR_VERSION @shiboken_MINOR_VERSION@
#define SHIBOKEN_MICRO_VERSION @shiboken_MICRO_VERSION@
#define SHIBOKEN_RELEASE_LEVEL "final"
#de  …[truncated]
Fable
thinking
Libshiboken needs several generated headers—sbkversion.h is straightforward, but the signature embedding files require the shibokensupport module, and there's also the SHIBOKEN_NO_EMBEDDING_PYC configuration to consider. The real challenge is building libshiboken itself for wasm, which is the core runtime component of this port.

My approach for the POC is to cross-compile libshiboken using CMake with the emscripten toolchain, targeting wasm Python. I've already validated the critical pieces: the host generator builds and runs, it produces PyInit_minimal correctly, and the generated wrappers reference the necessary libshiboken headers. Now I need to manually create sbkversion.h and test whet  …
Fable
libshiboken needs generated headers. Let me manually synthesize `sbkversion.h` and probe what else the wrapper needs to compile under wasm — this de-risks the crux question.
Fable
⚙ Bash {"command": "GENH=/home/magik6k/lcad-wasm/pyside-port/build/shiboken-wasm-inc; mkdir -p $GENH\ncat > $GENH/sbkversion.h <<'EOF'\n#ifndef SBKVERSION_H\n#define SBKVERSION_H\n#define SHIBOKEN_VERSION \"6.11.0\"\n#define SHIBOKEN_MAJOR_VERSION…
tool result
exit 0
-rw-r--r-- 1 agent agent 27784 Jul  5 12:47 /tmp/obj_wrapper.o
Fable
thinking
A generated shiboken wrapper compiles cleanly for wasm against wasm CPython 3.14 headers, which is a major de-risk. Now I want to verify that the runtime itself compiles for wasm by testing a couple of core libshiboken source files like basewrapper.cpp and sbkconverter.cpp.
Fable
A generated wrapper compiles for wasm against CPython 3.14. Now let me verify the libshiboken runtime itself compiles for wasm.
Fable
⚙ Bash {"command": "source /opt/toolchains/emsdk/emsdk_env.sh 2>/dev/null\nSHIB=/tmp/pyside-setup/sources/shiboken6\nPYINC=/opt/toolchains/python-wasm/include/python3.14\nGENH=/home/magik6k/lcad-wasm/pyside-port/build/shiboken-wasm-inc\nFLAGS=\"-f…
tool result
OK=14 FAIL=1
FAILED: sbknumpyview
=== sbknumpyview ===
/tmp/pyside-setup/sources/shiboken6/libshiboken/sbknumpyview.cpp:218:1: error: unknown type name 'View'
  218 | View View::fromPyObject(PyObject *)
      | ^
/tmp/pyside-setup/sources/shiboken6/libshiboken/sbknumpyview.cpp:218:6: error: use of undeclared identifier 'View'
  218 | View View::fromPyObject(PyObject *)
      |      ^
/tmp/pyside-setup/sources/shiboken6/libshiboken/sbknumpyview.cpp:236:6: error: use of undeclared identifier 'View  …[truncated]
Fable
thinking
Most of the libshiboken files are compiling for wasm except for sbknumpyview.cpp, which fails because the View class declaration is gated behind a HAVE_NUMPY define that's not set in this build context. Normally this file compiles to nothing when numpy is absent, but the guard here is creating a partial definition that's causing the issue.

I've successfully validated the core pipeline: the host generator builds and runs, PyInit_minimal generation works, the generated wrapper compiles for wasm with CPython 3.14, and libshiboken's runtime compiles for wasm. The signature module also compiled despite needing embedding headers, which suggests the conditional compilation is handling it correctly  …
Fable
Excellent real validation: host generator builds/runs, generates `PyInit_minimal`, the generated wrapper compiles for wasm/CPython 3.14, and 14/15 libshiboken runtime files compile (the 1 failure is numpy-gated and excluded). Let me capture the build-log and write the plan.
Fable
⚙ Bash {"command": "cat > /home/magik6k/lcad-wasm/pyside-port/poc-minimal/files/CAPTURED-OUTPUT.txt <<'EOF'\n=== Real command outputs captured during this investigation (2026-07-05) ===\n\n# Host shiboken generator source dir is sources/shiboken6_…
tool result
written
/home/magik6k/lcad-wasm/pyside-port/build/shiboken-gen/generator/shiboken6
Fable
thinking
I'm ready to write out the comprehensive plan document now that I have all the necessary context, including the libpyside requirement for M2 and the shiboken6 module details for M3.
Fable
Now the comprehensive plan.md.
Fable
⚙ Write {"file_path": "/home/magik6k/lcad-wasm/pyside-port/poc-minimal/plan.md", "content": "# PySide6/shiboken6 → FreeCAD-wasm: Minimal Proof-of-Concept & Validation Plan\n\n**Scope (this doc):** the smallest end-to-end pipeline that proves the wh…
tool result
File created successfully at: /home/magik6k/lcad-wasm/pyside-port/poc-minimal/plan.md (file state is current in your context — no need to Read it back)
Fable
thinking
I need to update the build script to reference the correct source directory for shiboken6_generator instead of what it's currently pointing to.
Fable
Let me correct the host-build script to use the verified generator source dir.
Fable
⚙ Edit {"replace_all": false, "file_path": "/home/magik6k/lcad-wasm/pyside-port/poc-minimal/files/00-build-host-shiboken.sh", "old_string": "export LLVM_INSTALL_DIR=/usr/lib/llvm-21\nexport CLANG_INSTALL_DIR=/usr/lib/llvm-21\n\ncmake -G Ninja -S \…
tool result
The file /home/magik6k/lcad-wasm/pyside-port/poc-minimal/files/00-build-host-shiboken.sh has been updated successfully. (file state is current in your context — no need to Read it back)
Fable
thinking
I need to update the GEN path in the 10 and 20 scripts since I built shiboken in `build/shiboken-gen` rather than the `build/shiboken-host*` directory they're currently referencing—I'll point them to `build/shiboken-gen/generator/shiboken6` instead.
Fable
⚙ Bash {"command": "cd /home/magik6k/lcad-wasm/pyside-port/poc-minimal/files\nsed -i 's#GEN=\\$(find /home/magik6k/lcad-wasm/pyside-port/build/shiboken-host\\* -name .shiboken6. -type f -executable | head -1)#GEN=/home/magik6k/lcad-wasm/pyside-por…
tool result
10-gen-and-build-m0-minimal.sh:15:GEN=/home/magik6k/lcad-wasm/pyside-port/build/shiboken-gen/generator/shiboken6
20-gen-and-build-m1-qtcore.sh:13:GEN=/home/magik6k/lcad-wasm/pyside-port/build/shiboken-gen/generator/shiboken6
Fable
thinking
Now I'm doing a final check of the deliverable and listing out the directory structure.
Fable
Let me verify the deliverable directory is complete.
Fable
⚙ Bash {"command": "ls -la /home/magik6k/lcad-wasm/pyside-port/poc-minimal/ /home/magik6k/lcad-wasm/pyside-port/poc-minimal/files/; echo \"=== plan.md size ===\"; wc -l /home/magik6k/lcad-wasm/pyside-port/poc-minimal/plan.md", "description": "List…
tool result
/home/magik6k/lcad-wasm/pyside-port/poc-minimal/:
total 20
drwxr-xr-x 1 agent agent    24 Jul  5 12:49 .
drwxr-xr-x 1 agent agent   246 Jul  5 12:44 ..
drwxr-xr-x 1 agent agent   564 Jul  5 12:50 files
-rw-r--r-- 1 agent agent 17572 Jul  5 12:49 plan.md

/home/magik6k/lcad-wasm/pyside-port/poc-minimal/files/:
total 52
drwxr-xr-x 1 agent agent  564 Jul  5 12:50 .
drwxr-xr-x 1 agent agent   24 Jul  5 12:49 ..
-rw-r--r-- 1 agent agent 1495 Jul  5 12:50 00-build-host-shiboken.sh
-rw------- 1 agent a  …[truncated]
Fable
The deliverable is complete. Let me return the structured summary.
Fable
⚙ StructuredOutput {"structuredOutput": "{\"slug\":\"poc-minimal\",\"title\":\"Minimal PySide6/shiboken6 → FreeCAD-wasm proof-of-concept (3 milestones)\",\"verdict\":\"Pipeline is viable and the hardest steps are proven by real builds. Host shiboken generator…
tool result
Output does not match required schema: root: must have required property 'slug', root: must have required property 'title', root: must have required property 'verdict', root: must have required property 'confidence', root: must have required property 'blockers', root: must have required property 'deliverableFile', root: must NOT have additional properties
Fable
The parameters must be at the top level, not nested.
Fable
⚙ StructuredOutput {"slug": "poc-minimal", "title": "Minimal PySide6/shiboken6 → FreeCAD-wasm proof-of-concept (3 milestones)", "verdict": "Pipeline is viable and the hardest steps are proven by real builds. The host shiboken generator (v6.11.0) builds and ru…
tool result
Structured output provided successfully