Build error with QTextToSpeech in QT6.4.0

itorin

Hi all, I'm using Qt 6.4 on macOS. I am trying to convert my TextToSpeech application for Qt 5.15 to Qt 6.4, but I'm stuck.
My procedure is as follows:

Open Qt Creator
[Create Project...]->"Qt widget application" (all defaults thereafter except "qmake" as build system)
add "QT += texttospeech" into .pro file.
add "#include <QTextToSpeech>" into mainwindow.cpp.
Build it, then I got "In included file: 'QtQmlIntegration/qqmlintegration.h' file not found" error.

How to solve it? Any additional configuration in .pro file in Qt 6.4?

SGaist

Hi and welcome to devnet,

What if you use the include of the class you actually use rather than the module wide include ?

itorin

@SGaist
Thank you for your reply on my question!
You mean that I don't need the line "QT+=texttospeech" module definition?
It seems to be needed to turn on the tts functionality.

Anyway, I found a workaround.
Add the line below to .pro file.
INCLUDEPATH += /Qt_installed_path/6.4.0/macos/include/

In Step 4 of my above explanation, "#include <QTextToSpeech>" reads the file "/Qt_installed_path/6.4.0/macos/lib/QtTextToSpeech.framework/Versions/A/Header/QTextToSpeech" and the contents of this file is only one line:
$ cat QTextToSpeech
#include "qtexttospeech.h"

At the line 17 of qtexttospeech.h, there is "#include <QtQmlIntegration/qqmlintegration.h>".
The file, qqmlintegration.h is there at "/Qt_installed_path/6.4.0/macos/include/".
Clang does not seem to search header files in"/Qt_installed_path/6.4.0/macos/include/“ directory.
So, we need add this directory to INCLUDEPATH.

However, it looks ad-hoc workaround.
Can anyone know the essential solution?

SGaist

My bad !
I forgot that there was a class named like that and mixed it which the module wide include.

As a workaround, I think (I don't have my machine at hand right now) you can add QT += qml to your .pro file.

itorin

@SGaist
"QT += qml" solved my problem!
Thank you for your help!