subagent transcript

session 17f09f89 · workflow wf_4e894f41
← 17f09f89 · archive
delegated task
You are working on the FreeCAD -> WebAssembly port. Ground EVERYTHING in the real code; do not guess. - Source tree: /home/magik6k/lcad-wasm/freecad-p
▸ Magik
You are working on the FreeCAD -> WebAssembly port. Ground EVERYTHING in the real code; do not guess. - Source tree: /home/magik6k/lcad-wasm/freecad-port/FreeCAD (git branch wasm-port). CMake build dir (out-of-source, already configured): /opt/toolchains/src/freecad-gui-build — read /opt/toolchains/src/freecad-gui-build/CMakeCache.txt for BUILD_* flags and dep paths. Build binary: bin/FreeCAD.wasm (~180 MB). - Toolchain: emscripten, ASYNCIFY + JS exceptions (-fexceptions), SINGLE-THREADED (no pthreads). Static CPython 3.14 + static Qt 6.11 (wasm) + static OCCT + static Coin3D. Everything is statically linked; there is NO dlopen — Python C-extension modules are registered statically via PyImport_AppendInittab in the generated file src/Main/WasmInittab.cpp / WasmInittabGui.cpp (see also freecadWasmRegisterInittab in src/Main/MainGui.cpp). - CRITICAL wasm constraints you MUST check for and design around: (1) THREADING HANGS: any std::thread ctor / std::async(default or async policy) / QThreadPool / QtConcurrent / QThread worker HANGS or throws (no pthreads). Fix pattern: force synchronous/deferred on __EMSCRIPTEN__ (e.g. std::launch::deferred), or #ifndef FC_OS_WASM guard the worker and run inline. Example already in-tree: Mod/Sketcher/App/planegcs/GCS.cpp forced std::launch::deferred; App/Application.cpp guards _recomputeThread with #ifndef FC_OS_WASM; Gui/ProgressBar.cpp skips qApp->processEvents() on __EMSCRIPTEN__. (2) MODAL DIALOGS / NESTED EVENT LOOPS: QDialog::exec()/QMessageBox::exec()/QEventLoop::exec() may deadlock under asyncify when driven from outside the main loop. Task-panel (docked, non-modal) dialogs are preferred. (3) Reentrant ccalls from JS during asyncify suspend corrupt state — a QTimer command-pump (/fc-cmd.py) exists for JS->Python. QtWebEngine has NO wasm port (Web workbench / in-app help / real Start page can't use it). (4) Wasm guards used in-tree: __EMSCRIPTEN__ (compiler-provided) and FC_OS_WASM (FreeCAD-defined) — both are defined on wasm. - Built modules today: Part, Sketcher, Material, Start (+ kernel). Everything else is OFF (see BUILD_* in CMakeCache). - PySide/shiboken: FREECAD_USE_PYSIDE=OFF, FREECAD_USE_SHIBOKEN=OFF, PySide6_DIR/Shiboken6_DIR NOTFOUND. Python 'PySide'/'shiboken6' import fails at runtime ("Cannot load shiboken6"). Many workbenches (Draft, BIM, most task dialogs) are Python+PySide and cannot function without it. DELIVERABLES — do BOTH: 1) Write a thorough, concrete, ready-to-apply plan to /home/magik6k/lcad-wasm/porting/<SLUG>/plan.md — include: exact CMake flags/edits, exact source edits (file + before/after or unified-diff snippets precise enough to apply), any NEW files (full contents), external-dependency build recipes (how to build each dep for this emscripten/asyncify toolchain), a threading-hazard list (grep the real files, give file:line + the exact construct + the exact fix), a modal-dialog-hazard list, the PyImport_AppendInittab lines to add, an ordered step list, and an effort/risk estimate. Put any patch files or new-file contents as separate files in that dir too. 2) Return the structured summary (the schema). Keep summary fields concise; the depth goes in plan.md. Your returned text IS the structured object. Be exhaustive and correct — token cost is not a concern. Verify claims against the actual files (use grep/read). If a dependency has no known wasm port, say so plainly and estimate the porting effort. === ADVERSARIAL VERIFICATION === The plan claims PySide6+shiboken6 CAN be built for this emscripten/asyncify/static-Qt/static-CPython toolchain and statically registered via inittab. Your job is to REFUTE this. Search for concrete blockers: Does shiboken's generated code or libshiboken/libpyside rely on dlopen / dynamic module loading / RTLD? Threading in libpyside signal delivery? Does PySide6-wasm require a specific Qt build flag this build lacks? Does the binding size blow the wasm memory/size budget? Is the shiboken/pyside version compatible with Qt 6.11 AND CPython 3.14? Default to "there ARE blockers" unless the evidence is strong. Write findings to /home/magik6k/lcad-wasm/porting/pyside-verify/plan.md and return the schema (slug=pyside-verify; feasibility reflects your honest verdict; risks[] = the concrete blockers you found).
Fable
thinking
I'm diving into the adversarial verification task to challenge whether PySide6 with shiboken6 can actually be built for this toolchain, so I need to examine the build configuration and relevant source files to find the evidence.
Fable
⚙ Bash {"command": "git branch 2>/dev/null | head; echo \"---CACHE PYSIDE/SHIBOKEN---\"; grep -iE \"PYSIDE|SHIBOKEN|USE_PYSIDE\" /opt/toolchains/src/freecad-gui-build/CMakeCache.txt 2>/dev/null | head -50", "description": "Inspect branch and PySid…
tool result
  main
* wasm-port
---CACHE PYSIDE/SHIBOKEN---
//Links to the PySide libraries at build time.
FREECAD_USE_PYSIDE:BOOL=OFF
//Links to the shiboken library at build time. If OFF its Python
FREECAD_USE_SHIBOKEN:BOOL=OFF
//The directory containing a CMake configuration file for PySide6.
PySide6_DIR:PATH=PySide6_DIR-NOTFOUND
//The directory containing a CMake configuration file for Shiboken6.
Shiboken6_DIR:PATH=Shiboken6_DIR-NOTFOUND
Fable
⚙ Bash {"command": "grep -iE \"PTHREAD|ASYNCIFY|EXCEPTION|SIDE_MODULE|MAIN_MODULE|DISABLE_EXCEPTION|WASM|EMSCRIPTEN\" /opt/toolchains/src/freecad-gui-build/CMakeCache.txt 2>/dev/null | head -60", "description": "Inspect wasm/emscripten build flags…
tool result
Boost_DIR:UNINITIALIZED=/opt/toolchains/boost-wasm/lib/cmake/Boost-1.86.0
CMAKE_CXX_FLAGS:STRING=-fexceptions -DEIGEN_DONT_VECTORIZE -DBOOST_HAS_PTHREADS=1 -DBOOST_STACKTRACE_USE_NOOP
CMAKE_C_FLAGS:STRING=-fexceptions -DXML_DEV_URANDOM
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;/opt/toolchains/yaml-wasm;/opt/toolchains/python-wasm;/opt/toolchains/boost-wasm;/opt/toolchains/  …[truncated]
Fable
⚙ Bash {"command": "ls /opt/toolchains 2>/dev/null; echo \"---\"; ls /opt/toolchains/src 2>/dev/null; echo \"---emsdk?---\"; which emcc emcmake 2>/dev/null; emcc --version 2>/dev/null | head -3", "description": "Inspect toolchain layout and emscri…
tool result
boost-wasm
emsdk
fix-freetype-sjlj.sh
fmt-wasm
freecad-gui-web
gtest-wasm
icu-wasm
include
occt-wasm
oscad-deps
oscad-src
python-wasm
qt
qt-asyncify
qt-jspi
qtsrc
rebuild-deps-407.sh
rebuild-deps-jseh.sh
rebuild-deps-wasmeh.sh
rebuild-qt-asyncify-412.sh
rebuild-qt-asyncify.sh
rebuild-qt-jspi-jseh.sh
rebuild-qt-jspi-wasmeh.sh
rebuild-qt-jspi.sh
src
venv
wasm-opt-4.0.12.bak
xerces-wasm
yaml-wasm
---
OCCT-7_8_1
Python-3.14.4
boost-1.86.0
fmt-11.1.4
freecad-gui-build
ftbase.c.o
googletest-1.15.2
icu  …[truncated]
Fable
thinking
I'm gathering the technical constraints here—Emscripten 4.0.12, Qt 6.11.1 compiled for WebAssembly with single-threaded asyncify, Python 3.14.4 as a static build without pthreads support. The core question is whether PySide6 and shiboken can even function in this environment, particularly around dynamic module loading and whether the Qt WebAssembly build provides the necessary modules that PySide depends on. I need to examine how FreeCAD references PySide in its source to understand the integration points.

Now I'm looking at the structural challenges—each PySide module like QtCore, QtGui, and QtWidgets is a separate CPython extension that would need inittab registration in a static wasm bui  …
Fable
⚙ Bash {"command": "cd /home/magik6k/lcad-wasm/freecad-port/FreeCAD; echo \"=== PySide references in build/cmake ===\"; grep -rniE \"pyside|shiboken\" cMake/ CMakeLists.txt 2>/dev/null | head -40", "description": "Find PySide/shiboken cmake usage"…
tool result
=== PySide references in build/cmake ===
cMake/FindPySide6Tools.cmake:1:# Try to find PYSIDE6 utilities, PYSIDE6UIC and PYSIDE6RCC:
cMake/FindPySide6Tools.cmake:2:# PYSIDE_UIC_EXECUTABLE - Location of PYSIDE6UIC executable
cMake/FindPySide6Tools.cmake:3:# PYSIDE_RCC_EXECUTABLE - Location of PYSIDE6RCC executable
cMake/FindPySide6Tools.cmake:4:# PYSIDE_TOOLS_FOUND - PYSIDE6 utilities found.
cMake/FindPySide6Tools.cmake:7:    get_target_property(PYSIDE6_UIC_EXECUTABLE Qt6::uic LOCATION)
cMake/Find  …[truncated]
Fable
⚙ Bash {"command": "find / -iname \"*pyside*\" 2>/dev/null | grep -v freecad-port/FreeCAD/src | head -40; echo \"=== shiboken files ===\"; find / -iname \"*shiboken*\" 2>/dev/null | head -40", "description": "Locate any PySide/shiboken installs on…
tool result
/opt/toolchains/src/freecad-gui-build/Ext/PySide
/home/magik6k/lcad-wasm/freecad-port/FreeCAD/cMake/FindPySide2Tools.cmake
/home/magik6k/lcad-wasm/freecad-port/FreeCAD/cMake/FindPySide6.cmake
/home/magik6k/lcad-wasm/freecad-port/FreeCAD/cMake/FindPySide6Tools.cmake
/home/magik6k/lcad-wasm/freecad-port/FreeCAD/cMake/FreeCAD_Helpers/SetupShibokenAndPyside.cmake
=== shiboken files ===
/home/magik6k/lcad-wasm/freecad-port/FreeCAD/cMake/FindShiboken6.cmake
/home/magik6k/lcad-wasm/freecad-port/FreeCAD  …[truncated]
Fable
⚙ Bash {"command": "cd /home/magik6k/lcad-wasm/freecad-port/FreeCAD; echo \"=== how FreeCAD picks PySide vs stub ===\"; grep -rniE \"shiboken|pyside\" src/Tools/ 2>/dev/null | head; echo \"=== Gui pyside fallback ===\"; ls src/Gui/*Py* 2>/dev/null…
tool result
=== how FreeCAD picks PySide vs stub ===
src/Tools/make_snapshot.py:25:from PySide2 import QtGui
src/Tools/updatets.py:250:        elif os.system("pyside2-lupdate -version") == 0:
src/Tools/updatets.py:251:            PYLUPDATE = "pyside2-lupdate"
src/Tools/updatets.py:253:                "Please do not use pyside2-lupdate at the moment, as it shows encoding problems. Please use pylupdate5 or 6 instead."
src/Tools/updatecrowdin.py:88:    from PySide6 import QtCore
src/Tools/updatecrowdin.py:90:   …[truncated]
Fable
thinking
I'm diving into FreeCAD's fallback PySide implementation in the Ext/PySide directory and how shiboken integrates with the build system. I need to trace through SetupShibokenAndPyside.cmake to understand the runtime binding mechanism, particularly how the Gui module uses shiboken to wrap C++ code and expose version information.
Fable
⚙ Bash {"command": "cd /home/magik6k/lcad-wasm/freecad-port/FreeCAD; echo \"=== Ext/PySide shim ===\"; ls -la /opt/toolchains/src/freecad-gui-build/Ext/PySide/ 2>/dev/null; echo \"=== PythonWrapper uses shiboken ===\"; ls src/Gui/PythonWrapper* 2>…
tool result
=== Ext/PySide shim ===
total 44
drwxr-xr-x 2 agent agent 4096 Jul  4 06:33 .
drwxr-xr-x 4 agent agent 4096 Jul  4 06:33 ..
-rw-r--r-- 1 agent agent   93 Jul  4 17:00 QtCore.py
-rw-r--r-- 1 agent agent  121 Jul  4 17:00 QtGui.py
-rw-r--r-- 1 agent agent   32 Jul  4 17:00 QtNetwork.py
-rw-r--r-- 1 agent agent   28 Jul  4 17:00 QtSvg.py
-rw-r--r-- 1 agent agent   35 Jul  4 17:00 QtSvgWidgets.py
-rw-r--r-- 1 agent agent   32 Jul  4 17:00 QtUiTools.py
-rw-r--r-- 1 agent agent   92 Jul  4 17:00 QtWeb  …[truncated]
Fable
⚙ Bash {"command": "cd /home/magik6k/lcad-wasm/freecad-port/FreeCAD; sed -n '1,120p' src/Gui/PythonWrapper.cpp 2>/dev/null | grep -niE \"include|shiboken|pyside|#if\" | head -60", "description": "PythonWrapper includes"}
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>
37:// Uncomment this block to remove PySide C++ support and switch to its Python interface
38:// #undef HAVE_SHIBOKEN2
39:// #undef HAVE_PYSIDE2
40:// #undef HAVE_SHIBOKEN6
41:// #undef HAVE_PYSIDE6
43:#include <FCConfig.h>
45:#ifdef FC_OS_WIN32
54:#if defin  …[truncated]
Fable
⚙ Bash {"command": "cd /home/magik6k/lcad-wasm/freecad-port/FreeCAD; grep -niE \"HAVE_SHIBOKEN|HAVE_PYSIDE|shiboken\" src/Gui/PythonWrapper.cpp 2>/dev/null | head -60", "description": "Shiboken guards in PythonWrapper"}
tool result
38:// #undef HAVE_SHIBOKEN2
39:// #undef HAVE_PYSIDE2
40:// #undef HAVE_SHIBOKEN6
41:// #undef HAVE_PYSIDE6
69:// shiboken2 and PySide2 specific defines and includes
74:#ifdef HAVE_SHIBOKEN2
75:# define HAVE_SHIBOKEN
76:# ifdef HAVE_PYSIDE2
77:#  define HAVE_PYSIDE
79:// Include shiboken first to get the version
80:#  include <shiboken.h>
82:// Do not use SHIBOKEN_MICRO_VERSION; it might contain a dot
83:#  define SHIBOKEN_FULL_VERSION QT_VERSION_CHECK(SHIBOKEN_MAJOR_VERSION, SHIBOKE  …[truncated]
Fable
thinking
I'm diving into how Shiboken's module import mechanism works in a WebAssembly static build context. The key issue is that when `Shiboken::Module::import` calls `PyImport_ImportModule`, those modules need to be pre-registered in the inittab for wasm to find them. I'm trying to understand exactly how QtCore, QtGui, and QtWidgets modules get loaded and where the registration happens.

The real blockers I'm identifying are: PySide's signal manager and threading model with the GIL, whether QThread gets used, and Qt's private headers. But the actual showstopper is that PySide6 is built as separate shared libraries and Python extension modules loaded dynamically—there's no supported static build pa  …
Fable
⚙ Bash {"command": "ls /opt/toolchains/venv/lib/*/site-packages 2>/dev/null | grep -iE \"pyside|shiboken\"; echo \"=== pip show ===\"; /opt/toolchains/venv/bin/pip show PySide6 shiboken6 2>/dev/null | head; echo \"=== host python pyside ===\"; pyt…
tool result
=== pip show ===
=== host python pyside ===
Traceback (most recent call last):
  File "<string>", line 1, in <module>
    import PySide6, shiboken6; print(PySide6.__version__)
    ^^^^^^^^^^^^^^^^^^^^^^^^^
ModuleNotFoundError: No module named 'PySide6'
Fable
⚙ Bash {"command": "cd /home/magik6k/lcad-wasm/freecad-port/FreeCAD; sed -n '300,420p' src/Gui/PythonWrapper.cpp", "description": "Read loadPySideModule + import mechanism"}
tool result
static std::string getPySideModuleName(const std::string& moduleName)
{
    std::string name(ModulePySide);
    name += '.';
    name += moduleName;

    return name;
}

#ifdef HAVE_SHIBOKEN_TYPEINITSTRUCT
static bool loadPySideModule(const std::string& moduleName, Shiboken::Module::TypeInitStruct*& types)
#else
static bool loadPySideModule(const std::string& moduleName, PyTypeObject**& types)
#endif
{
#if defined(HAVE_SHIBOKEN) && defined(HAVE_PYSIDE)
    if (!types) {
          …[truncated]
Fable
thinking
I need to dig into the actual Qt build configuration and how FreeCAD generates its WASM initialization table to verify whether static registration is really happening here. Let me examine the WasmInittabGui.cpp file and the rebuild-qt-asyncify script to understand what features Qt was compiled with and whether it includes the private headers PySide depends on.
Fable
⚙ Bash {"command": "cd /home/magik6k/lcad-wasm/freecad-port/FreeCAD; echo \"=== WasmInittabGui.cpp (sample) ===\"; ls -la src/Main/WasmInittab*.cpp 2>/dev/null; sed -n '1,60p' src/Main/WasmInittabGui.cpp 2>/dev/null; echo; echo \"=== grep shiboken…
tool result
=== WasmInittabGui.cpp (sample) ===

=== grep shiboken/qt in inittab ===
Fable
⚙ Bash {"command": "echo \"=== Qt build: static? private headers? modules ===\"; sed -n '1,80p' /opt/toolchains/rebuild-qt-asyncify-412.sh 2>/dev/null", "description": "Inspect Qt asyncify build script"}
tool result
=== Qt build: static? private headers? modules ===
#!/usr/bin/env bash
# Rebuild Qt with ASYNCIFY + JS-EH (-fexceptions). Uses the already-downloaded,
# gate-patched qtsrc. JS-EH avoids the Binaryen parse bug on OCCT's wasm-EH
# try_table output while JSPI still fixes the CPython-trampoline conflict.
set -e
TC=/opt/toolchains
source $TC/emsdk/emsdk_env.sh 2>/dev/null
QTHOST=$TC/qt/6.11.1/gcc_64
PREFIX=$TC/qt-asyncify/6.11.1/wasm_singlethread
rm -rf $TC/qt-asyncify $TC/qtsrc/qtbase-build $TC/qtsr  …[truncated]
Fable
thinking
The core issue is that Qt was compiled without threading support, which completely blocks PySide since its QtCore bindings depend on QThread and related threading classes that simply don't exist in this Qt build. This breaks the entire PySide compilation pipeline because the type system expects these threading components to be available.

I'd need to regenerate the PySide bindings specifically against this thread-disabled Qt configuration, which isn't a supported setup and would be a major undertaking. Let me search for the inittab files to understand the module structure better.
Fable
⚙ Bash {"command": "cd /home/magik6k/lcad-wasm/freecad-port/FreeCAD; find . -iname \"*Inittab*\" 2>/dev/null; find /opt/toolchains/src/freecad-gui-build -iname \"*Inittab*\" 2>/dev/null | head; echo \"=== MainGui register ===\"; grep -niE \"Append…
tool result
/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
=== MainGui register ===
156:void freecadWasmRegisterInittab();
199:    freecadWasmRegisterInittab();
Fable
⚙ Bash {"command": "cd /home/magik6k/lcad-wasm/freecad-port/FreeCAD; echo \"=== SetupShibokenAndPyside.cmake ===\"; sed -n '1,140p' cMake/FreeCAD_Helpers/SetupShibokenAndPyside.cmake", "description": "Read shiboken/pyside cmake setup"}
tool result
=== SetupShibokenAndPyside.cmake ===
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 "${PYTHON_LIBRARY_DIR}/cmake")
        find_package(PySide REQUIRE  …[truncated]
Fable
thinking
I need to verify how the WasmInittabGui.cpp file registers modules to understand the inittab mechanism, then check how shiboken's Module::import works and whether the Qt build includes the QtQml private headers PySide requires. Let me also quickly confirm the generated inittab format and whether static registration would even be feasible structurally.
Fable
⚙ Bash {"command": "sed -n '1,80p' /opt/toolchains/src/freecad-gui-build/src/Main/WasmInittabGui.cpp", "description": "Read generated inittab to understand registration mechanism"}
tool result
// Generated by src/Main/CMakeLists.txt (wasm port)
#include <Python.h>
extern "C" PyObject* PyInit_Part();
extern "C" PyObject* PyInit_Sketcher();
extern "C" PyObject* PyInit_Materials();
extern "C" PyObject* PyInit_PartGui();
extern "C" PyObject* PyInit_SketcherGui();
extern "C" PyObject* PyInit_MatGui();
extern "C" PyObject* PyInit_StartGui();
void freecadWasmRegisterInittab()
{
    PyImport_AppendInittab("Part", PyInit_Part);
    PyImport_AppendInittab("Sketcher", PyInit_Sketcher);
    PyImp  …[truncated]
Fable
⚙ Bash {"command": "cd /home/magik6k/lcad-wasm/freecad-port/FreeCAD; echo \"=== how modules get registered (generator) ===\"; grep -rniE \"AppendInittab|WasmInittab|PyInit_\" src/Main/CMakeLists.txt cMake/ 2>/dev/null | head -30; echo \"=== QtQml …
tool result
=== how modules get registered (generator) ===
src/Main/CMakeLists.txt:48:            string(APPEND _decls "extern \"C\" PyObject* PyInit_${_mod}();\n")
src/Main/CMakeLists.txt:49:            string(APPEND _regs "    PyImport_AppendInittab(\"${_mod}\", PyInit_${_mod});\n")
src/Main/CMakeLists.txt:60:    freecad_wasm_generate_inittab(${CMAKE_CURRENT_BINARY_DIR}/WasmInittab.cpp
src/Main/CMakeLists.txt:62:    freecad_wasm_generate_inittab(${CMAKE_CURRENT_BINARY_DIR}/WasmInittabGui.cpp
src/Main/CMak  …[truncated]
Fable
thinking
I've confirmed the Qt build has private headers and static linking, though threading is disabled and QtQml isn't included. Now I'm identifying the concrete blockers that make this approach infeasible—specifically, there's no official PySide6/shiboken6 port for WebAssembly or emscripten, and Qt for WebAssembly doesn't provide language bindings at all.

PySide's entire build architecture relies on dynamically loading separate extension modules for each Qt module at runtime, but this wasm build is fully static with no dlopen support. The build system has no path for static module compilation—I'd need to manually build shiboken and PySide as static archives, register each QtCore/QtGui/QtWidgets   …
Fable
⚙ Bash {"command": "QINC=/opt/toolchains/qt-asyncify/6.11.1/wasm_singlethread/include/QtCore; echo \"=== qthread header present? ===\"; ls $QINC/qthread.h $QINC/qmutex.h $QINC/qthreadpool.h 2>&1; echo \"=== QT_CONFIG(thread) in qtcore-config ===\"…
tool result
=== qthread header present? ===
/opt/toolchains/qt-asyncify/6.11.1/wasm_singlethread/include/QtCore/qmutex.h
/opt/toolchains/qt-asyncify/6.11.1/wasm_singlethread/include/QtCore/qthread.h
/opt/toolchains/qt-asyncify/6.11.1/wasm_singlethread/include/QtCore/qthreadpool.h
=== QT_CONFIG(thread) in qtcore-config ===
#define QT_THREADSAFE_CLOEXEC 1
Fable
⚙ Bash {"command": "CFG=$(find /opt/toolchains/qt-asyncify -name \"qtcore-config.h\" 2>/dev/null | head -1); echo \"cfg=$CFG\"; grep -iE \"thread\" $CFG | head -20; echo \"=== does qthread.h guard on QT_CONFIG(thread)? ===\"; grep -nE \"QT_CONFIG\…
tool result
cfg=/opt/toolchains/qt-asyncify/6.11.1/wasm_singlethread/include/QtCore/qtcore-config.h
#define QT_THREADSAFE_CLOEXEC 1
=== does qthread.h guard on QT_CONFIG(thread)? ===
6:#ifndef QTHREAD_H
16:#if defined(Q_CC_MSVC) && defined(Q_PROCESSOR_X86)
167:#if defined(Q_PROCESSOR_X86_32) && ((defined(Q_OS_LINUX) && defined(__GLIBC__)) || defined(Q_OS_FREEBSD)) // x86 32-bit always uses GS
Fable
thinking
I notice the qtcore-config.h file isn't showing the QT_FEATURE_thread definition, so I'm searching through the full config to find where it's set — the `-no-feature-thread` flag should have defined it as -1.
Fable
⚙ Bash {"command": "CFG=$(find /opt/toolchains/qt-asyncify -name \"qtcore-config.h\" 2>/dev/null | head -1); grep -nE \"FEATURE_thread|FEATURE_future|FEATURE_concurrent|FEATURE_cxx11_future\" $CFG; echo \"=== private config too ===\"; PCFG=$(find …
tool result
6:#define QT_FEATURE_cxx11_future 1
=== private config too ===
Fable
thinking
I notice the `QT_FEATURE_thread` define isn't showing up in the public configuration, so I need to search through the headers to find where it's actually defined.
Fable
⚙ Bash {"command": "grep -rnE \"define QT_FEATURE_thread \" /opt/toolchains/qt-asyncify/6.11.1/wasm_singlethread/include/ 2>/dev/null | head; echo \"=== search value ===\"; grep -rn \"QT_FEATURE_thread\" /opt/toolchains/qt-asyncify/6.11.1/wasm_sin…
tool result
/opt/toolchains/qt-asyncify/6.11.1/wasm_singlethread/include/QtCore/qconfig.h:48:#define QT_FEATURE_thread -1
=== search value ===
/opt/toolchains/qt-asyncify/6.11.1/wasm_singlethread/include/QtCore/qconfig.h:48:#define QT_FEATURE_thread -1
Fable
thinking
So Qt was compiled with threading disabled, which means QThread itself is stubbed out and the entire threading ecosystem—QThreadPool, QtConcurrent, QFuture, QThreadStorage—is stripped away. This creates a problem for PySide's standard type bindings, which expect these classes to exist.

Now I'm documenting these findings and writing up the plan to the file.
Fable
⚙ Bash {"command": "mkdir -p /home/magik6k/lcad-wasm/porting/pyside-verify; echo created", "description": "Create output dir"}
tool result
created
Fable
⚙ Write {"file_path": "/home/magik6k/lcad-wasm/porting/pyside-verify/plan.md", "content": "# Adversarial verification: can PySide6 + shiboken6 be built for this\n# emscripten / asyncify / static-Qt / static-CPython FreeCAD-wasm toolchain?\n\n**Verd…
tool result
File created successfully at: /home/magik6k/lcad-wasm/porting/pyside-verify/plan.md (file state is current in your context — no need to Read it back)
Fable
⚙ StructuredOutput {"slug": "pyside-verify", "title": "Adversarial verification: PySide6 + shiboken6 for the FreeCAD wasm (asyncify/static-Qt/static-CPython) toolchain", "feasibility": "needs-dep-port", "oneLineVerdict": "REFUTED as a build-flag task: no rele…
tool result
Structured output provided successfully