Details
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Bug
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Resolution: Unresolved
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P1: Critical
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6.4.2
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None
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Linux/X11
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93201df99 (10.0)
Description
Trying to build a Qt project fails if any mocable file includes LLVM's (>= 15) Format.h. It appears that moc gets deeply confused parsing this unrelated header file and erroneously uses its data types in the generated code.
Presumably similar dangers are lurking in other code bases.
/usr/bin/qmake6 -o Makefile ../moctest/moctest.pro -spec linux-g++ CONFIG+=debug CONFIG+=qml_debug g++ -c -pipe -g -Wall -Wextra -fPIC -D_REENTRANT -DQT_QML_DEBUG -DQT_CORE_LIB -I../moctest -I. -I/usr/include/qt6 -I/usr/include/qt6/QtCore -I. -I/usr/lib/qt6/mkspecs/linux-g++ -o main.o ../moctest/main.cpp In file included from ../moctest/main.cpp:14: ./main.moc:58:43: error: ‘llvm::yaml::O’ has not been declared 58 | Q_CONSTINIT const QMetaObject llvm::yaml::O::staticMetaObject = { { | ^ ./main.moc:62:5: error: ‘qt_static_metacall’ was not declared in this scope 62 | qt_static_metacall, | ^~~~~~~~~~~~~~~~~~ ./main.moc:71:18: error: ‘llvm::yaml::O’ has not been declared 71 | void llvm::yaml::O::qt_static_metacall(QObject *_o, QMetaObject::Call _c, int _id, void **_a) | ^ ./main.moc:79:32: error: ‘llvm::yaml::O’ has not been declared 79 | const QMetaObject *llvm::yaml::O::metaObject() const | ^ ./main.moc:79:48: error: non-member function ‘const QMetaObject* metaObject()’ cannot have cv-qualifier 79 | const QMetaObject *llvm::yaml::O::metaObject() const | ^~~~~ ./main.moc: In function ‘const QMetaObject* metaObject()’: ./main.moc:81:21: error: ‘QScopedPointer<QObjectData> QObject::d_ptr’ is protected within this context 81 | return QObject::d_ptr->metaObject ? QObject::d_ptr->dynamicMetaObject() : &staticMetaObject; | ^~~~~ In file included from /usr/include/qt6/QtCore/QObject:1, from ../moctest/main.cpp:1: /usr/include/qt6/QtCore/qobject.h:403:33: note: declared protected here 403 | QScopedPointer<QObjectData> d_ptr; | ^~~~~ ./main.moc:81:21: error: invalid use of non-static data member ‘QObject::d_ptr’ 81 | return QObject::d_ptr->metaObject ? QObject::d_ptr->dynamicMetaObject() : &staticMetaObject; | ^~~~~ /usr/include/qt6/QtCore/qobject.h:403:33: note: declared here 403 | QScopedPointer<QObjectData> d_ptr; | ^~~~~ ./main.moc:81:50: error: ‘QScopedPointer<QObjectData> QObject::d_ptr’ is protected within this context 81 | return QObject::d_ptr->metaObject ? QObject::d_ptr->dynamicMetaObject() : &staticMetaObject; | ^~~~~ /usr/include/qt6/QtCore/qobject.h:403:33: note: declared protected here 403 | QScopedPointer<QObjectData> d_ptr; | ^~~~~ ./main.moc:81:50: error: invalid use of non-static data member ‘QObject::d_ptr’ 81 | return QObject::d_ptr->metaObject ? QObject::d_ptr->dynamicMetaObject() : &staticMetaObject; | ^~~~~ /usr/include/qt6/QtCore/qobject.h:403:33: note: declared here 403 | QScopedPointer<QObjectData> d_ptr; | ^~~~~ ./main.moc: At global scope: ./main.moc:84:19: error: ‘llvm::yaml::O’ has not been declared 84 | void *llvm::yaml::O::qt_metacast(const char *_clname) | ^ ./main.moc: In function ‘void* qt_metacast(const char*)’: ./main.moc:88:35: error: invalid use of ‘this’ in non-member function 88 | return static_cast<void*>(this); | ^~~~ ./main.moc:89:32: error: cannot call member function ‘virtual void* QObject::qt_metacast(const char*)’ without object 89 | return QObject::qt_metacast(_clname); | ~~~~~~~~~~~~~~~~~~~~^~~~~~~~~ ./main.moc: At global scope: ./main.moc:92:17: error: ‘llvm::yaml::O’ has not been declared 92 | int llvm::yaml::O::qt_metacall(QMetaObject::Call _c, int _id, void **_a) | ^ ./main.moc: In function ‘int qt_metacall(QMetaObject::Call, int, void**)’: ./main.moc:94:31: error: cannot call member function ‘virtual int QObject::qt_metacall(QMetaObject::Call, int, void**)’ without object 94 | _id = QObject::qt_metacall(_c, _id, _a); | ~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~ make: *** [Makefile:573: main.o] Error 1