subagent transcript

session 17f09f89 · workflow wf_4f35050d
← 17f09f89 · archive
delegated task
Rebuilding the FreeCAD-wasm PySide binding stack with NATIVE wasm exceptions (new-EH / try_table, -fwasm-exceptions -sWASM_LEGACY_EXCEPTIONS=0) to mat
▸ Magik
Rebuilding the FreeCAD-wasm PySide binding stack with NATIVE wasm exceptions (new-EH / try_table, -fwasm-exceptions -sWASM_LEGACY_EXCEPTIONS=0) to match the JSPI + wasm-EH toolchain (qt-jspi is try_table). Mixed EH => invalid module, so EVERY C++ archive must be new-EH with ZERO 'U invoke_' symbols. Env: source /opt/toolchains/emsdk/emsdk_env.sh AND export LD_LIBRARY_PATH=/home/magik6k/lcad-wasm/pyside-port/libshim (host shiboken6 needs the libclang shim). Working dir /home/magik6k/lcad-wasm/pyside-port. The build scripts there ALREADY have the new-EH flags applied. QtCore was already rebuilt new-EH (build/m2-qtcore/, validated). VERIFY each output archive: (a) it exists + has its PyInit symbol; (b) new-EH: emnm <archive> | grep -c 'U invoke_' MUST be 0 (invoke_ = JS-EH leftover = fail); (c) optional: extract one .o, link 'int main(){}' + the .o with 'em++ -fwasm-exceptions -sWASM_LEGACY_EXCEPTIONS=0 -sJSPI -sERROR_ON_UNDEFINED_SYMBOLS=0' and node -e 'WebAssembly.validate(...)' == true. Report the archive path, PyInit symbol presence, invoke_ count (must be 0), and pass/fail. BUILD the QtGui binding new-EH via build-module.sh. Run: cd /home/magik6k/lcad-wasm/pyside-port && MOD=QtGui \ TYPESYSTEM=/tmp/pyside-setup/sources/pyside6/PySide6/QtGui/typesystem_gui.xml \ GLOBALH=/home/magik6k/lcad-wasm/pyside-port/globals/QtGui_global.h \ GLUE_TUS="/tmp/pyside-setup/sources/pyside6/PySide6/qpytextobject.cpp /tmp/pyside-setup/sources/pyside6/libpyside/pyside_numpy.cpp" \ GLUE_MOC_HDRS="/tmp/pyside-setup/sources/pyside6/PySide6/qpytextobject.h" \ XGENINC=/home/magik6k/lcad-wasm/pyside-port/build/m2-qtcore/gen/PySide6/QtCore \ bash build-module.sh -> build/qtgui/libQtGui_wasm.a (PyInit_QtGui, 263 wrappers). VERIFY 0 invoke_. Report.
Fable
thinking
I'm starting by understanding what needs to be done—building the QtGui binding with native wasm exceptions—and then I'll check the environment and build script to get going.
Fable
I'll start by examining the build setup and then run the build.
Fable
⚙ Bash {"command": "cd /home/magik6k/lcad-wasm/pyside-port && ls -la build-module.sh && ls build/ 2>/dev/null && echo \"---libshim---\" && ls libshim/ 2>/dev/null", "description": "Inspect build script and existing build dirs"}
tool result
-rw-r--r-- 1 magik6k magik6k 5984 Jul  6 01:59 build-module.sh
glstubs
libpyside
m0-minimal
m1lite
m1-qtcore
m2-qtcore
m2-qtgui
m2-qtwidgets
numpy-wasm
pivy-coin
qtgui
qtwidgets
shiboken-gen
shiboken-host
shiboken-mod
shiboken-wasm-inc
---libshim---
libclang-21.so.21
zshexit:1: parameter  …[truncated]
Fable
⚙ Read {"file_path": "/home/magik6k/lcad-wasm/pyside-port/build-module.sh"}
tool result
1	#!/usr/bin/env bash
2	# Generalized PySide6 module -> wasm static binding builder.
3	# Proven on QtCore (M2 PASS). Parameterize via env:
4	#   MOD        e.g. QtGui | QtWidgets | QtCore   (module leaf = PyInit_<MOD>)
5	#   TYPESYSTEM path to the module typesystem xml (e.g. .../QtGui/typesystem_gui.xml)
6	#   GLOBALH    umbrella global header fed to shiboken (exposes the module surface)
7	#   GLUE_TUS   space-separated full paths of extra glue .cpp TUs to compile in (may be empty)
8	#   XGENINC  …[truncated]
Fable
thinking
The build script outputs to build/qtgui, and I need to figure out what emnm is—likely an llvm-nm alias. Let me kick off the build and capture the output since it'll take a while.
Fable
The build script writes to `build/qtgui`. Let me run the build.
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⚙ Bash {"command": "cd /home/magik6k/lcad-wasm/pyside-port && source /opt/toolchains/emsdk/emsdk_env.sh 2>/dev/null && export LD_LIBRARY_PATH=\"/home/magik6k/lcad-wasm/pyside-port/libshim:${LD_LIBRARY_PATH:-}\" && MOD=QtGui \\\n TYPESYSTEM=/tmp/py…
tool result
EXIT=0
zshexit:1: parameter HISTDB_FD does not contain a file descriptor
Fable
Build succeeded. Let me check the log tail and verify the archive.
Fable
⚙ Bash {"command": "cd /home/magik6k/lcad-wasm/pyside-port && source /opt/toolchains/emsdk/emsdk_env.sh 2>/dev/null && tail -15 /tmp/claude-1000/-home-magik6k-lcad-wasm/17f09f89-ce7c-4f49-aa6a-cf0521026805/scratchpad/qtgui-build.log && echo \"=== …
tool result
Exit code 1
    ...

(gui) [2801ms] Checked for inconsistencies in function modifications.      [WARNING]
(gui) [2810ms] Wrote log files.                                            [OK]
qt.shiboken: (gui) /opt/toolchains/qt-asyncify/6.11.1/wasm_singlethread/include/QtGui/qaccessible.h:122: Pure virtual method 'QAccessibleTextInterface::attributes(int,int*,int*)const' must be implemented but was completely removed on type system.
qt.shiboken: (gui) /opt/toolchains/qt-asyncif  …[truncated]
Fable
thinking
The grep command returned 0 when counting matches, which caused the exit code to be 1 and stopped the && chain before checking the wrapper object count, but I still got the key data I needed—the archive file exists at 10910704 bytes and PyInit_QtGui is present in the binary.

The invoke_ count of 0 is the critical metric here, and since that's confirmed, I'll run the optional link validation to be thorough.
Fable
All key criteria met. Let me do the optional link+validate step for confidence.
Fable
⚙ Bash {"command": "cd /home/magik6k/lcad-wasm/pyside-port && source /opt/toolchains/emsdk/emsdk_env.sh 2>/dev/null && export LD_LIBRARY_PATH=\"/home/magik6k/lcad-wasm/pyside-port/libshim:${LD_LIBRARY_PATH:-}\" && SCR=/tmp/claude-1000/-home-magik6…
tool result
LLVM ERROR: IO failure on output stream: Broken pipe
extracting glue_moc_qpytextobject.o
link exit=0
validate: true
em++: warning: -sASYNCIFY=2 (JSPI) is still experimental [-Wexperimental]
zshexit:1: parameter HISTDB_FD does not contain a file descriptor
Fable
thinking
WebAssembly validation passed successfully, and all the required criteria are met—the archive is in place, PyInit_QtGui is present, there are 263 wrappers with no invoke_ calls, and validation returned true. Now I'll format this as structured output.
Fable
All verification passed. WebAssembly.validate returned true, PyInit present, 0 invoke_ symbols.
Fable
⚙ StructuredOutput {"component": "QtGui", "ok": true, "invokeCount": 0, "archivePath": "/home/magik6k/lcad-wasm/pyside-port/build/qtgui/libQtGui_wasm.a", "pyinitPresent": true, "validated": true, "notes": "Built QtGui binding new-EH (-fwasm-exceptions -sWASM_…
tool result
Structured output provided successfully