Undefined Symbol : Qt wasm build

[izzaNaqvi2]

INFO:root: - ok emcc: warning: cannot represent a NaN literal '0xdb9e3d0' with custom bit pattern in NaN-canonicalizing JS engines (e.g. Firefox and Safari) without erasing bits! in ret double 0x7FF4000000000000 in _ZL7qt_snanv.10473() error: undefined symbol: _ZN10QQuickItem10classBeginEv warning: To disable errors for undefined symbols use -s ERROR_ON_UNDEFINED_SYMBOLS=0 error: undefined symbol: _ZN10QQuickItem10itemChangeENS_10ItemChangeERKNS_14ItemChangeDataE error: undefined symbol: _ZN10QQuickItem10touchEventEP11QTouchEvent error: undefined symbol: _ZN10QQuickItem10wheelEventEP11QWheelEvent error: undefined symbol: _ZN10QQuickItem11qt_metacallEN11QMetaObject4CallEiPPv error: undefined symbol: _ZN10QQuickItem11qt_metacastEPKc error: undefined symbol: _ZN10QQuickItem12focusInEventEP11QFocusEvent error: undefined symbol: _ZN10QQuickItem12updatePolishEv error: undefined symbol: _ZN10QQuickItem13dragMoveEventEP14QDragMoveEvent error: undefined symbol: _ZN10QQuickItem13focusOutEventEP11QFocusEvent error: undefined symbol: _ZN10QQuickItem13keyPressEventEP9QKeyEvent error: undefined symbol: _ZN10QQuickItem14dragEnterEventEP15QDragEnterEvent error: undefined symbol: _ZN10QQuickItem14dragLeaveEventEP15QDragLeaveEvent error: undefined symbol: _ZN10QQuickItem14hoverMoveEventEP11QHoverEvent error: undefined symbol: _ZN10QQuickItem14mouseMoveEventEP11QMouseEvent error: undefined symbol: ZN10QQuickItem15geometryChangedERK6QRectFS2 error: undefined symbol: _ZN10QQuickItem15hoverEnterEventEP11QHoverEvent error: undefined symbol: _ZN10QQuickItem15hoverLeaveEventEP11QHoverEvent error: undefined symbol: _ZN10QQuickItem15keyReleaseEventEP9QKeyEvent error: undefined symbol: _ZN10QQuickItem15mousePressEventEP11QMouseEvent error: undefined symbol: _ZN10QQuickItem16mouseUngrabEventEv error: undefined symbol: _ZN10QQuickItem16releaseResourcesEv error: undefined symbol: _ZN10QQuickItem16touchUngrabEventEv error: undefined symbol: _ZN10QQuickItem17componentCompleteEv error: undefined symbol: _ZN10QQuickItem17mouseReleaseEventEP11QMouseEvent error: undefined symbol: _ZN10QQuickItem21childMouseEventFilterEPS_P6QEvent error: undefined symbol: _ZN10QQuickItem21mouseDoubleClickEventEP11QMouseEvent error: undefined symbol: _ZN10QQuickItem21windowDeactivateEventEv error: undefined symbol: _ZN10QQuickItem5eventEP6QEvent error: undefined symbol: _ZN10QQuickItem7setFlagENS_4FlagEb error: undefined symbol: _ZN10QQuickItem9dropEventEP10QDropEvent error: undefined symbol: ZN10QQuickItemC2EPS error: undefined symbol: _ZN10QQuickItemD2Ev error: undefined symbol: _ZN11QQmlPrivate11qmlregisterENS_16RegistrationTypeEPv error: undefined symbol: _ZN11QQmlPrivate30qdeclarativeelement_destructorEP7QObject error: undefined symbol: _ZN11QQuickStyle8setStyleERK7QString error: undefined symbol: _ZN11QSGGeometry14setDrawingModeEj error: undefined symbol: _ZN11QSGGeometry33defaultAttributes_TexturedPoint2DEv error: undefined symbol: _ZN11QSGGeometryC1ERKNS_12AttributeSetEiii error: undefined symbol: _ZN12QApplication4execEv error: undefined symbol: _ZN12QApplicationC1ERiPPci error: undefined symbol: _ZN12QApplicationD1Ev error: undefined symbol: _ZN15QSGGeometryNode11setMaterialEP11QSGMaterial error: undefined symbol: _ZN16QSGTransformNodeC2Ev error: undefined symbol: _ZN16QSGTransformNodeD2Ev error: undefined symbol: _ZN20QSGBasicGeometryNode11setGeometryEP11QSGGeometry error: undefined symbol: _ZN21QQmlApplicationEngine4loadERK4QUrl error: undefined symbol: _ZN21QQmlApplicationEngineC1EP7QObject error: undefined symbol: _ZN21QQmlApplicationEngineD1Ev error: undefined symbol: _ZN24QSGOpaqueTextureMaterial10setTextureEP10QSGTexture error: undefined symbol: _ZN24QSGOpaqueTextureMaterialC1Ev error: undefined symbol: _ZN2Qc5Style5Style10initializeER10QQmlEngine error: undefined symbol: _ZN2Qc5Style5Style11getInstanceEv error: undefined symbol: _ZN2Qc5Style5Style18selectCurrentThemeE7QString error: undefined symbol: ZN7QSGNode15appendChildNodeEPS error: undefined symbol: _ZN7QSGNode7setFlagENS_4FlagEb error: undefined symbol: _ZN7QSGNode8setFlagsE6QFlagsINS_4FlagEEb error: undefined symbol: _ZNK10QQuickItem12boundingRectEv error: undefined symbol: _ZNK10QQuickItem15textureProviderEv error: undefined symbol: _ZNK10QQuickItem17isTextureProviderEv error: undefined symbol: _ZNK10QQuickItem6windowEv error: undefined symbol: _ZNK10QQuickItem8clipRectEv error: undefined symbol: _ZNK10QQuickItem8containsERK7QPointF error: undefined symbol: _ZNK12QQuickWindow22createTextureFromImageERK6QImage error: undefined symbol: _ZNK7QSGNode16isSubtreeBlockedEv error: undefined symbol: _ZThn8_N10QQuickItem10classBeginEv error: undefined symbol: _ZThn8_N10QQuickItem17componentCompleteEv error: undefined symbol: _ZN10QQuickItem16staticMetaObjectE error: undefined symbol: _ZTI10QQuickItem error: undefined symbol: _ZTI16QSGTransformNode Error: Aborting compilation due to previous errors ERROR:root:'/home/izza/emsdk/node/8.9.1_64bit/bin/node /home/izza/emsdk/emscripten/1.38.16/src/compiler.js /tmp/tmpm47Jtu.txt /home/izza/emsdk/emscripten/1.38.16/src/embind/emval.js /home/izza/emsdk/emscripten/1.38.16/src/embind/embind.js /home/izza/emsdk/emscripten/1.38.16/src/embind/emval.js /home/izza/emsdk/emscripten/1.38.16/src/embind/embind.js /home/izza/emsdk/emscripten/1.38.16/src/library_pthread_stub.js' failed (1) Makefile:229: recipe for target 'designer.js' failed make: *** [designer.js] Error 1

[kripken]

To debug stuff like this, you can use EMCC_DEBUG=1 in the env to see the commands emcc runs, and llvm-nm to see which symbols are present in which input files.