g++ -c -pipe -O2 -std=c++11 -fvisibility=hidden -fvisibility-inlines-hidden -fno-exceptions -Wall -W -Wvla -Wno-missing-field-initializers -D_REENTRANT -fPIC -DQT_NO_NARROWING_CONVERSIONS_IN_CONNECT -DQT_BUILD_REMOTEOBJECTS_LIB -DQT_BUILDING_QT -DQT_NO_CAST_TO_ASCII -DQT_ASCII_CAST_WARNINGS -DQT_MOC_COMPAT -DQT_USE_QSTRINGBUILDER -DQT_DEPRECATED_WARNINGS -DQT_DISABLE_DEPRECATED_BEFORE=0x050000 -DQT_NO_CAST_TO_ASCII -DQT_NO_CAST_FROM_ASCII -DQT_NO_CAST_FROM_BYTEARRAY -DQT_NO_URL_CAST_FROM_STRING -DQT_BUILD_REMOTEOBJECTS_LIB -DQT_NO_EXCEPTIONS -D_LARGEFILE64_SOURCE -D_LARGEFILE_SOURCE -DQT_NO_DEBUG -DQT_NETWORK_LIB -DQT_CORE_LIB -I. -I../../include -I../../include/QtRemoteObjects -I../../include/QtRemoteObjects/5.12.0 -I../../include/QtRemoteObjects/5.12.0/QtRemoteObjects -I. -I/qt/qt-everywhere-src-5.12.0/qtbase/include -I/qt/qt-everywhere-src-5.12.0/qtbase/include/QtNetwork -I/qt/qt-everywhere-src-5.12.0/qtbase/include/QtCore/5.12.0 -I/qt/qt-everywhere-src-5.12.0/qtbase/include/QtCore/5.12.0/QtCore -I/qt/qt-everywhere-src-5.12.0/qtbase/include/QtCore -I.moc -I/qt/qt-everywhere-src-5.12.0/qtbase/mkspecs/linux-g++ -o .obj/qconnectionfactories.o qconnectionfactories.cpp
qconnectionfactories.cpp: In constructor ExternalIoDevice::ExternalIoDevice(QIODevice*, QObject*):

qconnectionfactories.cpp:234:93: error: no matching function for call to ExternalIoDevice::connect(QPointer<QIODevice>&, void (QIODevice::*)(), ExternalIoDevice* const, ExternalIoDevice::ExternalIoDevice(QIODevice*, QObject*)::__lambda9)
     connect(m_device, &QIODevice::aboutToClose, this, [this]() { this->m_isClosing = true; });
                                                                                             ^
qconnectionfactories.cpp:234:93: note: candidates are:
In file included from /qt/qt-everywhere-src-5.12.0/qtbase/include/QtCore/qobject.h:1:0,
                 from /qt/qt-everywhere-src-5.12.0/qtbase/include/QtCore/../../src/corelib/io/qiodevice.h:45,
                 from /qt/qt-everywhere-src-5.12.0/qtbase/include/QtCore/qiodevice.h:1,
                 from /qt/qt-everywhere-src-5.12.0/qtbase/include/QtNetwork/../../src/network/socket/qabstractsocket.h:44,
                 from /qt/qt-everywhere-src-5.12.0/qtbase/include/QtNetwork/qabstractsocket.h:1,
                 from /qt/qt-everywhere-src-5.12.0/qtbase/include/QtNetwork/QAbstractSocket:1,
                 from qconnectionfactories_p.h:54,
                 from qconnectionfactories.cpp:40:
/qt/qt-everywhere-src-5.12.0/qtbase/include/QtCore/../../src/corelib/kernel/qobject.h:208:36: note: static QMetaObject::Connection QObject::connect(const QObject*, const char*, const QObject*, const char*, Qt::ConnectionType)
     static QMetaObject::Connection connect(const QObject *sender, const char *signal,
                                    ^
/qt/qt-everywhere-src-5.12.0/qtbase/include/QtCore/../../src/corelib/kernel/qobject.h:208:36: note:   no known conversion for argument 2 from void (QIODevice::*)() to const char*
/qt/qt-everywhere-src-5.12.0/qtbase/include/QtCore/../../src/corelib/kernel/qobject.h:211:36: note: static QMetaObject::Connection QObject::connect(const QObject*, const QMetaMethod&, const QObject*, const QMetaMethod&, Qt::ConnectionType)
     static QMetaObject::Connection connect(const QObject *sender, const QMetaMethod &signal,
                                    ^
/qt/qt-everywhere-src-5.12.0/qtbase/include/QtCore/../../src/corelib/kernel/qobject.h:211:36: note:   no known conversion for argument 2 from void (QIODevice::*)() to const QMetaMethod&
/qt/qt-everywhere-src-5.12.0/qtbase/include/QtCore/../../src/corelib/kernel/qobject.h:463:32: note: QMetaObject::Connection QObject::connect(const QObject*, const char*, const char*, Qt::ConnectionType) const
 inline QMetaObject::Connection QObject::connect(const QObject *asender, const char *asignal,
                                ^
/qt/qt-everywhere-src-5.12.0/qtbase/include/QtCore/../../src/corelib/kernel/qobject.h:463:32: note:   no known conversion for argument 2 from void (QIODevice::*)() to const char*
/qt/qt-everywhere-src-5.12.0/qtbase/include/QtCore/../../src/corelib/kernel/qobject.h:228:43: note: template<class Func1, class Func2> static QMetaObject::Connection QObject::connect(const typename QtPrivate::FunctionPointer<Func>::Object*, Func1, const typename QtPrivate::FunctionPointer<Func2>::Object*, Func2, Qt::ConnectionType)
     static inline QMetaObject::Connection connect(const typename QtPrivate::FunctionPointer<Func1>::Object *sender, Func1 signal,
                                           ^
/qt/qt-everywhere-src-5.12.0/qtbase/include/QtCore/../../src/corelib/kernel/qobject.h:228:43: note:   template argument deduction/substitution failed:
qconnectionfactories.cpp:234:93: note:   mismatched types const typename QtPrivate::FunctionPointer<Func>::Object* and QPointer<QIODevice>
     connect(m_device, &QIODevice::aboutToClose, this, [this]() { this->m_isClosing = true; });
                                                                                             ^
In file included from /qt/qt-everywhere-src-5.12.0/qtbase/include/QtCore/qobject.h:1:0,
                 from /qt/qt-everywhere-src-5.12.0/qtbase/include/QtCore/../../src/corelib/io/qiodevice.h:45,
                 from /qt/qt-everywhere-src-5.12.0/qtbase/include/QtCore/qiodevice.h:1,
                 from /qt/qt-everywhere-src-5.12.0/qtbase/include/QtNetwork/../../src/network/socket/qabstractsocket.h:44,
                 from /qt/qt-everywhere-src-5.12.0/qtbase/include/QtNetwork/qabstractsocket.h:1,
                 from /qt/qt-everywhere-src-5.12.0/qtbase/include/QtNetwork/QAbstractSocket:1,
                 from qconnectionfactories_p.h:54,
                 from qconnectionfactories.cpp:40:
/qt/qt-everywhere-src-5.12.0/qtbase/include/QtCore/../../src/corelib/kernel/qobject.h:260:13: note: template<class Func1, class Func2> static typename std::enable_if<((int)(QtPrivate::FunctionPointer<Func2>::ArgumentCount) >= 0), QMetaObject::Connection>::type QObject::connect(const typename QtPrivate::FunctionPointer<Func>::Object*, Func1, Func2)
             connect(const typename QtPrivate::FunctionPointer<Func1>::Object *sender, Func1 signal, Func2 slot)
             ^
/qt/qt-everywhere-src-5.12.0/qtbase/include/QtCore/../../src/corelib/kernel/qobject.h:260:13: note:   template argument deduction/substitution failed:
qconnectionfactories.cpp:234:93: note:   mismatched types ‘const typename QtPrivate::FunctionPointer<Func>::Object*’ and ‘QPointer<QIODevice>’
     connect(m_device, &QIODevice::aboutToClose, this, [this]() { this->m_isClosing = true; });
                                                                                             ^
In file included from /qt/qt-everywhere-src-5.12.0/qtbase/include/QtCore/qobject.h:1:0,
                 from /qt/qt-everywhere-src-5.12.0/qtbase/include/QtCore/../../src/corelib/io/qiodevice.h:45,
                 from /qt/qt-everywhere-src-5.12.0/qtbase/include/QtCore/qiodevice.h:1,
                 from /qt/qt-everywhere-src-5.12.0/qtbase/include/QtNetwork/../../src/network/socket/qabstractsocket.h:44,
                 from /qt/qt-everywhere-src-5.12.0/qtbase/include/QtNetwork/qabstractsocket.h:1,
                 from /qt/qt-everywhere-src-5.12.0/qtbase/include/QtNetwork/QAbstractSocket:1,
                 from qconnectionfactories_p.h:54,
                 from qconnectionfactories.cpp:40:
/qt/qt-everywhere-src-5.12.0/qtbase/include/QtCore/../../src/corelib/kernel/qobject.h:269:13: note: template<class Func1, class Func2> static typename std::enable_if<(((int)(QtPrivate::FunctionPointer<Func2>::ArgumentCount) >= 0) && (! QtPrivate::FunctionPointer<Func2>::IsPointerToMemberFunction)), QMetaObject::Connection>::type QObject::connect(const typename QtPrivate::FunctionPointer<Func>::Object*, Func1, const QObject*, Func2, Qt::ConnectionType)
             connect(const typename QtPrivate::FunctionPointer<Func1>::Object *sender, Func1 signal, const QObject *context, Func2 slot,
             ^
/qt/qt-everywhere-src-5.12.0/qtbase/include/QtCore/../../src/corelib/kernel/qobject.h:269:13: note:   template argument deduction/substitution failed:
qconnectionfactories.cpp:234:93: note:   mismatched types const typename QtPrivate::FunctionPointer<Func>::Object*and QPointer<QIODevice>
     connect(m_device, &QIODevice::aboutToClose, this, [this]() { this->m_isClosing = true; });
                                                                                             ^
In file included from /qt/qt-everywhere-src-5.12.0/qtbase/include/QtCore/qobject.h:1:0,
                 from /qt/qt-everywhere-src-5.12.0/qtbase/include/QtCore/../../src/corelib/io/qiodevice.h:45,
                 from /qt/qt-everywhere-src-5.12.0/qtbase/include/QtCore/qiodevice.h:1,
                 from /qt/qt-everywhere-src-5.12.0/qtbase/include/QtNetwork/../../src/network/socket/qabstractsocket.h:44,
                 from /qt/qt-everywhere-src-5.12.0/qtbase/include/QtNetwork/qabstractsocket.h:1,
                 from /qt/qt-everywhere-src-5.12.0/qtbase/include/QtNetwork/QAbstractSocket:1,
                 from qconnectionfactories_p.h:54,
                 from qconnectionfactories.cpp:40:
/qt/qt-everywhere-src-5.12.0/qtbase/include/QtCore/../../src/corelib/kernel/qobject.h:300:13: note: template<class Func1, class Func2> static typename std::enable_if<(QtPrivate::FunctionPointer<Func2>::ArgumentCount == (-1)), QMetaObject::Connection>::type QObject::connect(const typename QtPrivate::FunctionPointer<Func>::Object*, Func1, Func2)
             connect(const typename QtPrivate::FunctionPointer<Func1>::Object *sender, Func1 signal, Func2 slot)
             ^
/qt/qt-everywhere-src-5.12.0/qtbase/include/QtCore/../../src/corelib/kernel/qobject.h:300:13: note:   template argument deduction/substitution failed:
qconnectionfactories.cpp:234:93: note:   mismatched types ‘const typename QtPrivate::FunctionPointer<Func>::Object*’ and ‘QPointer<QIODevice>’
     connect(m_device, &QIODevice::aboutToClose, this, [this]() { this->m_isClosing = true; });
                                                                                             ^
In file included from /qt/qt-everywhere-src-5.12.0/qtbase/include/QtCore/qobject.h:1:0,
                 from /qt/qt-everywhere-src-5.12.0/qtbase/include/QtCore/../../src/corelib/io/qiodevice.h:45,
                 from /qt/qt-everywhere-src-5.12.0/qtbase/include/QtCore/qiodevice.h:1,
                 from /qt/qt-everywhere-src-5.12.0/qtbase/include/QtNetwork/../../src/network/socket/qabstractsocket.h:44,
                 from /qt/qt-everywhere-src-5.12.0/qtbase/include/QtNetwork/qabstractsocket.h:1,
                 from /qt/qt-everywhere-src-5.12.0/qtbase/include/QtNetwork/QAbstractSocket:1,
                 from qconnectionfactories_p.h:54,
                 from qconnectionfactories.cpp:40:
/qt/qt-everywhere-src-5.12.0/qtbase/include/QtCore/../../src/corelib/kernel/qobject.h:308:13: note: template<class Func1, class Func2> static typename std::enable_if<(QtPrivate::FunctionPointer<Func2>::ArgumentCount == (-1)), QMetaObject::Connection>::type QObject::connect(const typename QtPrivate::FunctionPointer<Func>::Object*, Func1, const QObject*, Func2, Qt::ConnectionType)
             connect(const typename QtPrivate::FunctionPointer<Func1>::Object *sender, Func1 signal, const QObject *context, Func2 slot,
             ^
/qt/qt-everywhere-src-5.12.0/qtbase/include/QtCore/../../src/corelib/kernel/qobject.h:308:13: note:   template argument deduction/substitution failed:
qconnectionfactories.cpp:234:93: note:   mismatched types ‘const typename QtPrivate::FunctionPointer<Func>::Object*’ and ‘QPointer<QIODevice>’
     connect(m_device, &QIODevice::aboutToClose, this, [this]() { this->m_isClosing = true; });
                                                                                             ^
qconnectionfactories.cpp:235:80: error: no matching function for call to ExternalIoDevice::connect(QPointer<QIODevice>&, void (QIODevice::*)(), ExternalIoDevice* const, void (IoDeviceBase::*)())
     connect(m_device, &QIODevice::readyRead, this, &ExternalIoDevice::readyRead);
                                                                                ^
qconnectionfactories.cpp:235:80: note: candidates are:
In file included from /qt/qt-everywhere-src-5.12.0/qtbase/include/QtCore/qobject.h:1:0,
                 from /qt/qt-everywhere-src-5.12.0/qtbase/include/QtCore/../../src/corelib/io/qiodevice.h:45,
                 from /qt/qt-everywhere-src-5.12.0/qtbase/include/QtCore/qiodevice.h:1,unx
                 from /qt/qt-everywhere-src-5.12.0/qtbase/include/QtNetwork/../../src/network/socket/qabstractsocket.h:44,
                 from /qt/qt-everywhere-src-5.12.0/qtbase/include/QtNetwork/qabstractsocket.h:1,
                 from /qt/qt-everywhere-src-5.12.0/qtbase/include/QtNetwork/QAbstractSocket:1,
                 from qconnectionfactories_p.h:54,
                 from qconnectionfactories.cpp:40:
/qt/qt-everywhere-src-5.12.0/qtbase/include/QtCore/../../src/corelib/kernel/qobject.h:208:36: note: static QMetaObject::Connection QObject::connect(const QObject*, const char*, const QObject*, const char*, Qt::ConnectionType)
     static QMetaObject::Connection connect(const QObject *sender, const char *signal,
                                    ^
/qt/qt-everywhere-src-5.12.0/qtbase/include/QtCore/../../src/corelib/kernel/qobject.h:208:36: note:   no known conversion for argument 2 from ‘void (QIODevice::*)()’ to ‘const char*’
/qt/qt-everywhere-src-5.12.0/qtbase/include/QtCore/../../src/corelib/kernel/qobject.h:211:36: note: static QMetaObject::Connection QObject::connect(const QObject*, const QMetaMethod&, const QObject*, const QMetaMethod&, Qt::ConnectionType)
     static QMetaObject::Connection connect(const QObject *sender, const QMetaMethod &signal,
                                    ^
/qt/qt-everywhere-src-5.12.0/qtbase/include/QtCore/../../src/corelib/kernel/qobject.h:211:36: note:   no known conversion for argument 2 from ‘void (QIODevice::*)()’ to ‘const QMetaMethod&’
/qt/qt-everywhere-src-5.12.0/qtbase/include/QtCore/../../src/corelib/kernel/qobject.h:463:32: note: QMetaObject::Connection QObject::connect(const QObject*, const char*, const char*, Qt::ConnectionType) const
 inline QMetaObject::Connection QObject::connect(const QObject *asender, const char *asignal,
                                ^
/qt/qt-everywhere-src-5.12.0/qtbase/include/QtCore/../../src/corelib/kernel/qobject.h:463:32: note:   no known conversion for argument 2 from ‘void (QIODevice::*)()’ to ‘const char*’
/qt/qt-everywhere-src-5.12.0/qtbase/include/QtCore/../../src/corelib/kernel/qobject.h:228:43: note: template<class Func1, class Func2> static QMetaObject::Connection QObject::connect(const typename QtPrivate::FunctionPointer<Func>::Object*, Func1, const typename QtPrivate::FunctionPointer<Func2>::Object*, Func2, Qt::ConnectionType)
     static inline QMetaObject::Connection connect(const typename QtPrivate::FunctionPointer<Func1>::Object *sender, Func1 signal,
                                           ^
/qt/qt-everywhere-src-5.12.0/qtbase/include/QtCore/../../src/corelib/kernel/qobject.h:228:43: note:   template argument deduction/substitution failed:
qconnectionfactories.cpp:235:80: note:   mismatched types ‘const typename QtPrivate::FunctionPointer<Func>::Object*’ and ‘QPointer<QIODevice>’
     connect(m_device, &QIODevice::readyRead, this, &ExternalIoDevice::readyRead);
                                                                                ^
In file included from /qt/qt-everywhere-src-5.12.0/qtbase/include/QtCore/qobject.h:1:0,
                 from /qt/qt-everywhere-src-5.12.0/qtbase/include/QtCore/../../src/corelib/io/qiodevice.h:45,
                 from /qt/qt-everywhere-src-5.12.0/qtbase/include/QtCore/qiodevice.h:1,
                 from /qt/qt-everywhere-src-5.12.0/qtbase/include/QtNetwork/../../src/network/socket/qabstractsocket.h:44,
                 from /qt/qt-everywhere-src-5.12.0/qtbase/include/QtNetwork/qabstractsocket.h:1,
                 from /qt/qt-everywhere-src-5.12.0/qtbase/include/QtNetwork/QAbstractSocket:1,
                 from qconnectionfactories_p.h:54,
                 from qconnectionfactories.cpp:40:
/qt/qt-everywhere-src-5.12.0/qtbase/include/QtCore/../../src/corelib/kernel/qobject.h:260:13: note: template<class Func1, class Func2> static typename std::enable_if<((int)(QtPrivate::FunctionPointer<Func2>::ArgumentCount) >= 0), QMetaObject::Connection>::type QObject::connect(const typename QtPrivate::FunctionPointer<Func>::Object*, Func1, Func2)
             connect(const typename QtPrivate::FunctionPointer<Func1>::Object *sender, Func1 signal, Func2 slot)
             ^
/qt/qt-everywhere-src-5.12.0/qtbase/include/QtCore/../../src/corelib/kernel/qobject.h:260:13: note:   template argument deduction/substitution failed:
qconnectionfactories.cpp:235:80: note:   mismatched types ‘const typename QtPrivate::FunctionPointer<Func>::Object*’ and ‘QPointer<QIODevice>’
     connect(m_device, &QIODevice::readyRead, this, &ExternalIoDevice::readyRead);
                                                                                ^
In file included from /qt/qt-everywhere-src-5.12.0/qtbase/include/QtCore/qobject.h:1:0,
                 from /qt/qt-everywhere-src-5.12.0/qtbase/include/QtCore/../../src/corelib/io/qiodevice.h:45,
                 from /qt/qt-everywhere-src-5.12.0/qtbase/include/QtCore/qiodevice.h:1,
                 from /qt/qt-everywhere-src-5.12.0/qtbase/include/QtNetwork/../../src/network/socket/qabstractsocket.h:44,
                 from /qt/qt-everywhere-src-5.12.0/qtbase/include/QtNetwork/qabstractsocket.h:1,
                 from /qt/qt-everywhere-src-5.12.0/qtbase/include/QtNetwork/QAbstractSocket:1,
                 from qconnectionfactories_p.h:54,
                 from qconnectionfactories.cpp:40:
/qt/qt-everywhere-src-5.12.0/qtbase/include/QtCore/../../src/corelib/kernel/qobject.h:269:13: note: template<class Func1, class Func2> static typename std::enable_if<(((int)(QtPrivate::FunctionPointer<Func2>::ArgumentCount) >= 0) && (! QtPrivate::FunctionPointer<Func2>::IsPointerToMemberFunction)), QMetaObject::Connection>::type QObject::connect(const typename QtPrivate::FunctionPointer<Func>::Object*, Func1, const QObject*, Func2, Qt::ConnectionType)
             connect(const typename QtPrivate::FunctionPointer<Func1>::Object *sender, Func1 signal, const QObject *context, Func2 slot,
             ^
/qt/qt-everywhere-src-5.12.0/qtbase/include/QtCore/../../src/corelib/kernel/qobject.h:269:13: note:   template argument deduction/substitution failed:
qconnectionfactories.cpp:235:80: note:   mismatched types ‘const typename QtPrivate::FunctionPointer<Func>::Object*’ and ‘QPointer<QIODevice>’
     connect(m_device, &QIODevice::readyRead, this, &ExternalIoDevice::readyRead);
                                                                                ^
In file included from /qt/qt-everywhere-src-5.12.0/qtbase/include/QtCore/qobject.h:1:0,
                 from /qt/qt-everywhere-src-5.12.0/qtbase/include/QtCore/../../src/corelib/io/qiodevice.h:45,
                 from /qt/qt-everywhere-src-5.12.0/qtbase/include/QtCore/qiodevice.h:1,
                 from /qt/qt-everywhere-src-5.12.0/qtbase/include/QtNetwork/../../src/network/socket/qabstractsocket.h:44,
                 from /qt/qt-everywhere-src-5.12.0/qtbase/include/QtNetwork/qabstractsocket.h:1,
                 from /qt/qt-everywhere-src-5.12.0/qtbase/include/QtNetwork/QAbstractSocket:1,
                 from qconnectionfactories_p.h:54,
                 from qconnectionfactories.cpp:40:
/qt/qt-everywhere-src-5.12.0/qtbase/include/QtCore/../../src/corelib/kernel/qobject.h:300:13: note: template<class Func1, class Func2> static typename std::enable_if<(QtPrivate::FunctionPointer<Func2>::ArgumentCount == (-1)), QMetaObject::Connection>::type QObject::connect(const typename QtPrivate::FunctionPointer<Func>::Object*, Func1, Func2)
             connect(const typename QtPrivate::FunctionPointer<Func1>::Object *sender, Func1 signal, Func2 slot)
             ^
/qt/qt-everywhere-src-5.12.0/qtbase/include/QtCore/../../src/corelib/kernel/qobject.h:300:13: note:   template argument deduction/substitution failed:
qconnectionfactories.cpp:235:80: note:   mismatched types ‘const typename QtPrivate::FunctionPointer<Func>::Object*’ and ‘QPointer<QIODevice>’
     connect(m_device, &QIODevice::readyRead, this, &ExternalIoDevice::readyRead);
                                                                                ^
In file included from /qt/qt-everywhere-src-5.12.0/qtbase/include/QtCore/qobject.h:1:0,
                 from /qt/qt-everywhere-src-5.12.0/qtbase/include/QtCore/../../src/corelib/io/qiodevice.h:45,
                 from /qt/qt-everywhere-src-5.12.0/qtbase/include/QtCore/qiodevice.h:1,
                 from /qt/qt-everywhere-src-5.12.0/qtbase/include/QtNetwork/../../src/network/socket/qabstractsocket.h:44,
                 from /qt/qt-everywhere-src-5.12.0/qtbase/include/QtNetwork/qabstractsocket.h:1,
                 from /qt/qt-everywhere-src-5.12.0/qtbase/include/QtNetwork/QAbstractSocket:1,
                 from qconnectionfactories_p.h:54,
                 from qconnectionfactories.cpp:40:
/qt/qt-everywhere-src-5.12.0/qtbase/include/QtCore/../../src/corelib/kernel/qobject.h:308:13: note: template<class Func1, class Func2> static typename std::enable_if<(QtPrivate::FunctionPointer<Func2>::ArgumentCount == (-1)), QMetaObject::Connection>::type QObject::connect(const typename QtPrivate::FunctionPointer<Func>::Object*, Func1, const QObject*, Func2, Qt::ConnectionType)
             connect(const typename QtPrivate::FunctionPointer<Func1>::Object *sender, Func1 signal, const QObject *context, Func2 slot,
             ^
/qt/qt-everywhere-src-5.12.0/qtbase/include/QtCore/../../src/corelib/kernel/qobject.h:308:13: note:   template argument deduction/substitution failed:
qconnectionfactories.cpp:235:80: note:   mismatched types ‘const typename QtPrivate::FunctionPointer<Func>::Object*’ and ‘QPointer<QIODevice>’
     connect(m_device, &QIODevice::readyRead, this, &ExternalIoDevice::readyRead);
                                                                                ^
Makefile:3488: recipe for target '.obj/qconnectionfactories.o' failed
gmake[3]: *** [.obj/qconnectionfactories.o] Error 1
gmake[3]: Leaving directory 'qt/qt-everywhere-src-5.12.0/qtremoteobjects/src/remoteobjects'
Makefile:89: recipe for target 'sub-remoteobjects-make_first-ordered' failed
gmake[2]: *** [sub-remoteobjects-make_first-ordered] Error 2
gmake[2]: Leaving directory '/qt/qt-everywhere-src-5.12.0/qtremoteobjects/src'
Makefile:48: recipe for target 'sub-src-make_first' failed
gmake[1]: *** [sub-src-make_first] Error 2
gmake[1]: Leaving directory '/qt/qt-everywhere-src-5.12.0/qtremoteobjects'
Makefile:359: recipe for target 'module-qtremoteobjects-make_first' failed
gmake: *** [module-qtremoteobjects-make_first] Error 2