em++.bat emcc.bat and other bat files do not support for very long command line on windows.

[lygstate]

Please include the following in your bug report:

Version of emscripten/emsdk:

Please include the output `emcc -v` here
emcc (Emscripten gcc/clang-like replacement + linker emulating GNU ld) 4.0.7 (8dc91db45bf96c174531006839472a3924d105aa)
clang version 21.0.0git (https:/github.com/llvm/llvm-project 57025b42c43b2f14f7e58692bc19cd53d1b8a45e)
Target: wasm32-unknown-emscripten
Thread model: posix
InstalledDir: D:\CI-Tools\emsdk\upstream\bin

Failing command line in full:
If this is compile or link-time failure please include the full failing command
along with its entire output.

FAILED: [code=1] qtquick3dphysics/src/3rdparty/PhysX/BundledPhysX_autogen/timestamp qtquick3dphysics/src/3rdparty/PhysX/BundledPhysX_autogen/mocs_compilation.cpp D:/work/xtal-wasm/build-wasm/qtquick3dphysics/src/3rdparty/PhysX/BundledPhysX_autogen/timestamp D:/work/xtal-wasm/build-wasm/qtquick3dphysics/src/3rdparty/PhysX/BundledPhysX_autogen/mocs_compilation.cpp 
C:\WINDOWS\system32\cmd.exe /C "cd /D D:\work\xtal-wasm\build-wasm\qtquick3dphysics\src\3rdparty\PhysX && "C:\Program Files\CMake\bin\cmake.exe" -E cmake_autogen D:/work/xtal-wasm/build-wasm/qtquick3dphysics/src/3rdparty/PhysX/CMakeFiles/BundledPhysX_autogen.dir/AutogenInfo.json Release && "C:\Program Files\CMake\bin\cmake.exe" -E touch D:/work/xtal-wasm/build-wasm/qtquick3dphysics/src/3rdparty/PhysX/BundledPhysX_autogen/timestamp && "C:\Program Files\CMake\bin\cmake.exe" -E cmake_transform_depfile Ninja gccdepfile D:/work/xtal-wasm/qt-everywhere-src-6.10.2 D:/work/xtal-wasm/qt-everywhere-src-6.10.2/qtquick3dphysics/src/3rdparty/PhysX D:/work/xtal-wasm/build-wasm D:/work/xtal-wasm/build-wasm/qtquick3dphysics/src/3rdparty/PhysX D:/work/xtal-wasm/build-wasm/qtquick3dphysics/src/3rdparty/PhysX/BundledPhysX_autogen/deps D:/work/xtal-wasm/build-wasm/CMakeFiles/d/6c3f60a473c335cc99f3271a00131d6e2743c9d1af89eab2358456954a8e7f09.d"

AutoMoc subprocess error
------------------------
The content generation command for "BIN:/qtquick3dphysics/src/3rdparty/PhysX/BundledPhysX_autogen/moc_predefs.h" failed.
Process failed with return value 1

Command
-------
D:/CI-Tools/emsdk/upstream/emscripten/em++.bat -std=gnu++17 -w -dM -E "C:/Program Files/CMake/share/cmake-4.2/Modules/CMakeCXXCompilerABI.cpp" -DNDEBUG -DPX_COOKING -DQT_BUILD_PHYSXSTATIC_LIB -DQT_EXPLICIT_QFILE_CONSTRUCTION_FROM_PATH -DQT_HAVE_EMSCRIPTEN_ASYNCIFY -DQT_NO_DEBUG -DQT_NO_EXCEPTIONS -DQT_NO_FOREACH -DQT_NO_JAVA_STYLE_ITERATORS -DQT_NO_NARROWING_CONVERSIONS_IN_CONNECT -DQT_NO_QASCONST -DQT_NO_QEXCHANGE -DQT_NO_QSNPRINTF -DQT_NO_STD_FORMAT_SUPPORT -DQT_USE_QSTRINGBUILDER -D_LARGEFILE64_SOURCE -D_LARGEFILE_SOURCE -D_LIBCPP_HARDENING_MODE=_LIBCPP_HARDENING_MODE_FAST -ID:/work/xtal-wasm/qt-everywhere-src-6.10.2/qtquick3dphysics/src/3rdparty/PhysX/include -ID:/work/xtal-wasm/qt-everywhere-src-6.10.2/qtquick3dphysics/src/3rdparty/PhysX/include/characterkinematic -ID:/work/xtal-wasm/qt-everywhere-src-6.10.2/qtquick3dphysics/src/3rdparty/PhysX/include/collision -ID:/work/xtal-wasm/qt-everywhere-src-6.10.2/qtquick3dphysics/src/3rdparty/PhysX/include/common -ID:/work/xtal-wasm/qt-everywhere-src-6.10.2/qtquick3dphysics/src/3rdparty/PhysX/include/common/windows -ID:/work/xtal-wasm/qt-everywhere-src-6.10.2/qtquick3dphysics/src/3rdparty/PhysX/include/cooking -ID:/work/xtal-wasm/qt-everywhere-src-6.10.2/qtquick3dphysics/src/3rdparty/PhysX/include/cudamanager -ID:/work/xtal-wasm/qt-everywhere-src-6.10.2/qtquick3dphysics/src/3rdparty/PhysX/include/extensions -ID:/work/xtal-wasm/qt-everywhere-src-6.10.2/qtquick3dphysics/src/3rdparty/PhysX/include/filebuf -ID:/work/xtal-wasm/qt-everywhere-src-6.10.2/qtquick3dphysics/src/3rdparty/PhysX/include/foundation -ID:/work/xtal-wasm/qt-everywhere-src-6.10.2/qtquick3dphysics/src/3rdparty/PhysX/include/geometry -ID:/work/xtal-wasm/qt-everywhere-src-6.10.2/qtquick3dphysics/src/3rdparty/PhysX/include/geomutils -ID:/work/xtal-wasm/qt-everywhere-src-6.10.2/qtquick3dphysics/src/3rdparty/PhysX/include/gpu -ID:/work/xtal-wasm/qt-everywhere-src-6.10.2/qtquick3dphysics/src/3rdparty/PhysX/include/pvd -ID:/work/xtal-wasm/qt-everywhere-src-6.10.2/qtquick3dphysics/src/3rdparty/PhysX/include/solver -ID:/work/xtal-wasm/qt-everywhere-src-6.10.2/qtquick3dphysics/src/3rdparty/PhysX/include/task -ID:/work/xtal-wasm/qt-everywhere-src-6.10.2/qtquick3dphysics/src/3rdparty/PhysX/include/vehicle -ID:/work/xtal-wasm/qt-everywhere-src-6.10.2/qtquick3dphysics/src/3rdparty/PhysX/pxshared/include -ID:/work/xtal-wasm/qt-everywhere-src-6.10.2/qtquick3dphysics/src/3rdparty/PhysX/pxshared/include/foundation -ID:/work/xtal-wasm/qt-everywhere-src-6.10.2/qtquick3dphysics/src/3rdparty/PhysX/pxshared/include/foundation/unix -ID:/work/xtal-wasm/qt-everywhere-src-6.10.2/qtquick3dphysics/src/3rdparty/PhysX/pxshared/include/foundation/windows -ID:/work/xtal-wasm/qt-everywhere-src-6.10.2/qtquick3dphysics/src/3rdparty/PhysX/source/common/include -ID:/work/xtal-wasm/qt-everywhere-src-6.10.2/qtquick3dphysics/src/3rdparty/PhysX/source/common/include/windows -ID:/work/xtal-wasm/qt-everywhere-src-6.10.2/qtquick3dphysics/src/3rdparty/PhysX/source/common/src -ID:/work/xtal-wasm/qt-everywhere-src-6.10.2/qtquick3dphysics/src/3rdparty/PhysX/source/fastxml/include -ID:/work/xtal-wasm/qt-everywhere-src-6.10.2/qtquick3dphysics/src/3rdparty/PhysX/source/filebuf/include -ID:/work/xtal-wasm/qt-everywhere-src-6.10.2/qtquick3dphysics/src/3rdparty/PhysX/source/foundation/include -ID:/work/xtal-wasm/qt-everywhere-src-6.10.2/qtquick3dphysics/src/3rdparty/PhysX/source/foundation/include/unix -ID:/work/xtal-wasm/qt-everywhere-src-6.10.2/qtquick3dphysics/src/3rdparty/PhysX/source/foundation/include/unix/neon -ID:/work/xtal-wasm/qt-everywhere-src-6.10.2/qtquick3dphysics/src/3rdparty/PhysX/source/foundation/include/unix/sse2 -ID:/work/xtal-wasm/qt-everywhere-src-6.10.2/qtquick3dphysics/src/3rdparty/PhysX/source/foundation/include/windows -ID:/work/xtal-wasm/qt-everywhere-src-6.10.2/qtquick3dphysics/src/3rdparty/PhysX/source/geomutils/include -ID:/work/xtal-wasm/qt-everywhere-src-6.10.2/qtquick3dphysics/src/3rdparty/PhysX/source/geomutils/src -ID:/work/xtal-wasm/qt-everywhere-src-6.10.2/qtquick3dphysics/src/3rdparty/PhysX/source/geomutils/src/ccd -ID:/work/xtal-wasm/qt-everywhere-src-6.10.2/qtquick3dphysics/src/3rdparty/PhysX/source/geomutils/src/common -ID:/work/xtal-wasm/qt-everywhere-src-6.10.2/qtquick3dphysics/src/3rdparty/PhysX/source/geomutils/src/contact -ID:/work/xtal-wasm/qt-everywhere-src-6.10.2/qtquick3dphysics/src/3rdparty/PhysX/source/geomutils/src/convex -ID:/work/xtal-wasm/qt-everywhere-src-6.10.2/qtquick3dphysics/src/3rdparty/PhysX/source/geomutils/src/distance -ID:/work/xtal-wasm/qt-everywhere-src-6.10.2/qtquick3dphysics/src/3rdparty/PhysX/source/geomutils/src/gjk -ID:/work/xtal-wasm/qt-everywhere-src-6.10.2/qtquick3dphysics/src/3rdparty/PhysX/source/geomutils/src/hf -ID:/work/xtal-wasm/qt-everywhere-src-6.10.2/qtquick3dphysics/src/3rdparty/PhysX/source/geomutils/src/intersection -ID:/work/xtal-wasm/qt-everywhere-src-6.10.2/qtquick3dphysics/src/3rdparty/PhysX/source/geomutils/src/mesh -ID:/work/xtal-wasm/qt-everywhere-src-6.10.2/qtquick3dphysics/src/3rdparty/PhysX/source/geomutils/src/pcm -ID:/work/xtal-wasm/qt-everywhere-src-6.10.2/qtquick3dphysics/src/3rdparty/PhysX/source/geomutils/src/sweep -ID:/work/xtal-wasm/qt-everywhere-src-6.10.2/qtquick3dphysics/src/3rdparty/PhysX/source/lowlevel/api/include -ID:/work/xtal-wasm/qt-everywhere-src-6.10.2/qtquick3dphysics/src/3rdparty/PhysX/source/lowlevel/common/include/collision -ID:/work/xtal-wasm/qt-everywhere-src-6.10.2/qtquick3dphysics/src/3rdparty/PhysX/source/lowlevel/common/include/pipeline -ID:/work/xtal-wasm/qt-everywhere-src-6.10.2/qtquick3dphysics/src/3rdparty/PhysX/source/lowlevel/common/include/utils -ID:/work/xtal-wasm/qt-everywhere-src-6.10.2/qtquick3dphysics/src/3rdparty/PhysX/source/lowlevel/software/include -ID:/work/xtal-wasm/qt-everywhere-src-6.10.2/qtquick3dphysics/src/3rdparty/PhysX/source/lowlevelaabb/include -ID:/work/xtal-wasm/qt-everywhere-src-6.10.2/qtquick3dphysics/src/3rdparty/PhysX/source/lowlevelaabb/src -ID:/work/xtal-wasm/qt-everywhere-src-6.10.2/qtquick3dphysics/src/3rdparty/PhysX/source/lowleveldynamics/include -ID:/work/xtal-wasm/qt-everywhere-src-6.10.2/qtquick3dphysics/src/3rdparty/PhysX/source/lowleveldynamics/src -ID:/work/xtal-wasm/qt-everywhere-src-6.10.2/qtquick3dphysics/src/3rdparty/PhysX/source/physx/src -ID:/work/xtal-wasm/qt-everywhere-src-6.10.2/qtquick3dphysics/src/3rdparty/PhysX/source/physx/src/buffering -ID:/work/xtal-wasm/qt-everywhere-src-6.10.2/qtquick3dphysics/src/3rdparty/PhysX/source/physx/src/device -ID:/work/xtal-wasm/qt-everywhere-src-6.10.2/qtquick3dphysics/src/3rdparty/PhysX/source/physxcharacterkinematic/src -ID:/work/xtal-wasm/qt-everywhere-src-6.10.2/qtquick3dphysics/src/3rdparty/PhysX/source/physxcooking/src -ID:/work/xtal-wasm/qt-everywhere-src-6.10.2/qtquick3dphysics/src/3rdparty/PhysX/source/physxcooking/src/convex -ID:/work/xtal-wasm/qt-everywhere-src-6.10.2/qtquick3dphysics/src/3rdparty/PhysX/source/physxcooking/src/mesh -ID:/work/xtal-wasm/qt-everywhere-src-6.10.2/qtquick3dphysics/src/3rdparty/PhysX/source/physxextensions/src -ID:/work/xtal-wasm/qt-everywhere-src-6.10.2/qtquick3dphysics/src/3rdparty/PhysX/source/physxextensions/src/serialization -ID:/work/xtal-wasm/qt-everywhere-src-6.10.2/qtquick3dphysics/src/3rdparty/PhysX/source/physxextensions/src/serialization/Binary -ID:/work/xtal-wasm/qt-everywhere-src-6.10.2/qtquick3dphysics/src/3rdparty/PhysX/source/physxextensions/src/serialization/File -ID:/work/xtal-wasm/qt-everywhere-src-6.10.2/qtquick3dphysics/src/3rdparty/PhysX/source/physxextensions/src/serialization/Xml -ID:/work/xtal-wasm/qt-everywhere-src-6.10.2/qtquick3dphysics/src/3rdparty/PhysX/source/physxgpu/include -ID:/work/xtal-wasm/qt-everywhere-src-6.10.2/qtquick3dphysics/src/3rdparty/PhysX/source/physxmetadata/core/include -ID:/work/xtal-wasm/qt-everywhere-src-6.10.2/qtquick3dphysics/src/3rdparty/PhysX/source/physxmetadata/extensions/include -ID:/work/xtal-wasm/qt-everywhere-src-6.10.2/qtquick3dphysics/src/3rdparty/PhysX/source/physxvehicle/src -ID:/work/xtal-wasm/qt-everywhere-src-6.10.2/qtquick3dphysics/src/3rdparty/PhysX/source/physxvehicle/src/physxmetadata/include -ID:/work/xtal-wasm/qt-everywhere-src-6.10.2/qtquick3dphysics/src/3rdparty/PhysX/source/pvd/include -ID:/work/xtal-wasm/qt-everywhere-src-6.10.2/qtquick3dphysics/src/3rdparty/PhysX/source/pvd/src -ID:/work/xtal-wasm/qt-everywhere-src-6.10.2/qtquick3dphysics/src/3rdparty/PhysX/source/scenequery/include -ID:/work/xtal-wasm/qt-everywhere-src-6.10.2/qtquick3dphysics/src/3rdparty/PhysX/source/scenequery/src -ID:/work/xtal-wasm/qt-everywhere-src-6.10.2/qtquick3dphysics/src/3rdparty/PhysX/source/simulationcontroller/include -ID:/work/xtal-wasm/qt-everywhere-src-6.10.2/qtquick3dphysics/src/3rdparty/PhysX/source/simulationcontroller/src -ID:/work/xtal-wasm/qt-everywhere-src-6.10.2/qtbase/mkspecs/wasm-emscripten -ID:/work/xtal-wasm/build-wasm/qtbase/include -ID:/CI-Tools/emsdk/upstream/emscripten/cache/sysroot/include/fakesdl -ID:/CI-Tools/emsdk/upstream/emscripten/cache/sysroot/include/compat -ID:/CI-Tools/emsdk/upstream/emscripten/cache/sysroot/include/c++/v1 -ID:/CI-Tools/emsdk/upstream/lib/clang/21/include -ID:/CI-Tools/emsdk/upstream/emscripten/cache/sysroot/include

Output
------
The command line is too long.

[761/8601] Running syncqt.cpp for module: QtExamplesAssetDownloader

[sbc100]

I wonder if this another reason to get rid of the bat files: #24858

[sbc100]

Do you happen to know where the failure is happening? is the issue with em++.bat (that bat file launcher)? Or is the issue that ninja itself should be using a response file in these cases maybe?

[lygstate]

Do you happen to know where the failure is happening? is the issue with em++.bat (that bat file launcher)? Or is the issue that ninja itself should be using a response file in these cases maybe?

It's the isse of windows bat, that do not support very long command line, but when compiling very big projects, it's a issue:( I am compiling Qt