Qt 5.13 warnings when build for iOS. How to fix it?

[bogong]

Hello all!
Just tried to build simple application for iOS on Qt 5.13 and got this warnings:

How to fix it not suppress? There are a lot of them. On 5.12.4 not appeared.

[mvuori]

Make the conversion explicit using a suitable cast.

Next time: post the whole warning message and the code which the warning concerns

[bogong]

@mvuori Legally I have no option to change anything because it's in Qt sources (there are the mentioning of the file in the sources, it's in QtCore not in my application) and this is the whole message that I got ... And only in iOS build.

[bogong]

The same trouble appeared on Qt 5.12.4 in Qt Test and again only for iOS build.

[J.Hilk]

@bogong are you building for simulator? because iOS devices should be 64 bit, which should make the int 64 bit which should make the implicit cast moot

[bogong]

@j-hilk It's for Qt Test on 5.12.4: It's happening when I am building static library for iOS with tests for iPhone 6SE, for simulator works fine. For Qt 5.13 couldn't say anything because Qt 5.13 killed on my computer after weekend of fighting against it :-) Awaiting Qt 5.13.1 within big hope :-)

[bogong]

The same issue on Qt 5.13.1 when building for iOS and for Simulator too.

In file included from /Users/alexandr/Projects/arboreus/arboreus_examples/qt/build-HandlingQMLFromCPP-Qt_5_13_1_for_iOS_Simulator-Debug/handlingqmlfromcpp_qml_plugin_import.cpp:3:
In file included from /Users/alexandr/Tools/qt/5.13.1/ios/include/QtCore/QtPlugin:1:
In file included from /Users/alexandr/Tools/qt/5.13.1/ios/include/QtCore/qplugin.h:44:
In file included from /Users/alexandr/Tools/qt/5.13.1/ios/include/QtCore/qobject.h:49:
/Users/alexandr/Tools/qt/5.13.1/ios/include/QtCore/qlist.h:1034:26: warning: implicit conversion loses integer precision: 'long' to 'int' [-Wshorten-64-to-32]
                return n - b;
                ~~~~~~ ~~^~~
In file included from /Users/alexandr/Projects/arboreus/arboreus_examples/qt/build-HandlingQMLFromCPP-Qt_5_13_1_for_iOS_Simulator-Debug/handlingqmlfromcpp_qml_plugin_import.cpp:3:
In file included from /Users/alexandr/Tools/qt/5.13.1/ios/include/QtCore/QtPlugin:1:
In file included from /Users/alexandr/Tools/qt/5.13.1/ios/include/QtCore/qplugin.h:44:
In file included from /Users/alexandr/Tools/qt/5.13.1/ios/include/QtCore/qobject.h:49:
In file included from /Users/alexandr/Tools/qt/5.13.1/ios/include/QtCore/qlist.h:1166:
/Users/alexandr/Tools/qt/5.13.1/ios/include/QtCore/qstringlist.h:270:23: note: in instantiation of function template specialization 'QtPrivate::lastIndexOf<QString, QStringView>' requested here
    return QtPrivate::lastIndexOf<QString, QStringView>(*this, string, from);
                      ^
In file included from /Users/alexandr/Projects/arboreus/arboreus_examples/qt/build-HandlingQMLFromCPP-Qt_5_13_1_for_iOS_Simulator-Debug/handlingqmlfromcpp_qml_plugin_import.cpp:3:
In file included from /Users/alexandr/Tools/qt/5.13.1/ios/include/QtCore/QtPlugin:1:
In file included from /Users/alexandr/Tools/qt/5.13.1/ios/include/QtCore/qplugin.h:44:
In file included from /Users/alexandr/Tools/qt/5.13.1/ios/include/QtCore/qobject.h:49:
/Users/alexandr/Tools/qt/5.13.1/ios/include/QtCore/qlist.h:1034:26: warning: implicit conversion loses integer precision: 'long' to 'int' [-Wshorten-64-to-32]
                return n - b;
                ~~~~~~ ~~^~~
In file included from /Users/alexandr/Projects/arboreus/arboreus_examples/qt/build-HandlingQMLFromCPP-Qt_5_13_1_for_iOS_Simulator-Debug/handlingqmlfromcpp_qml_plugin_import.cpp:3:
In file included from /Users/alexandr/Tools/qt/5.13.1/ios/include/QtCore/QtPlugin:1:
In file included from /Users/alexandr/Tools/qt/5.13.1/ios/include/QtCore/qplugin.h:44:
In file included from /Users/alexandr/Tools/qt/5.13.1/ios/include/QtCore/qobject.h:49:
In file included from /Users/alexandr/Tools/qt/5.13.1/ios/include/QtCore/qlist.h:1166:
/Users/alexandr/Tools/qt/5.13.1/ios/include/QtCore/qstringlist.h:275:23: note: in instantiation of function template specialization 'QtPrivate::lastIndexOf<QString, QLatin1String>' requested here
    return QtPrivate::lastIndexOf<QString, QLatin1String>(*this, string, from);

Is it bug or not?

[bogong]

@j-hilk Just tried to build on Qt 5.13.1 application for iOS device - got 58 warnings about implicit conversion. Device the same iPhone SE.

[SGaist]

Hi,

What version of Xcode are you using ?