unknown type name 'QSslConfiguration' (iphoneos-clang Qt 5.3.0 for iOS)

I tried with the Qt 5.3 beta 1 because I had the same issue with Qt 5.2 on Mac OSX 10.8.5 and xcode 5.1

May be it's a simple error from me and I'd be very sorry for this bug report if it is a simple error. I spent several days to investigate the root cause, so I've hoped I could find help on the bug tracker. I'm afraid I'd not be able to create Qt iOS applications for my company, if I can't solve the issue.

I've attached the whole QT creator compilation output (started from empty compilation output dir). xCode reports the same error.

I installed the qt-opensource-mac-x64-android-ios-5.3.0-beta.dmg. I created a QML application from the project creation assistant in QT creator. Added 'network' at the following line of the .pro file:

QT += qml quick network

And have this main.cpp:

#include <QGuiApplication>
#include <QQmlApplicationEngine>
#include <QSslConfiguration>

int main(int argc, char *argv[])
{
    QSslConfiguration sslconf;

    QGuiApplication app(argc, argv);

    QQmlApplicationEngine engine;
    engine.load(QUrl(QStringLiteral("qrc:///qml/main.qml")));



    return app.exec();
}

I can deploy the samples like declarative-camera or Marron on the iOS devices (including simulators). But I can't compile with QSslConfiguration because clang report the following error while it tries to compile main.o:

/Users/david/dev/ECSCapture-Qt/main.cpp:9:5: error: unknown type name 'QSslConfiguration'
    QSslConfiguration sslconf;

But it does not complain about: #include <QSslConfiguration>
So I suppose the issue must be about the clang options or something wrong in the xCode project configuration.

Except the previous one. The others errors in the compilation output are:

The following build commands failed:
	CompileC ECSCapture-Qt.build/Release-iphoneos/ECSCapture-Qt.build/Objects-normal/armv7/main.o /Users/davidfortier/dev/ECSCapture-Qt/main.cpp normal armv7 c++ com.apple.compilers.llvm.clang.1_0.compiler
(1 failure)

And:

make[1]: *** [iphoneos-release] Error 65
make: *** [release-iphoneos] Error 2
20:39:46: The process "/usr/bin/make" exited with code 2.
Error while building/deploying project ECSCapture-Qt (kit: iphoneos-clang Qt 5.3.0 for iOS)
When executing step 'Make'

N.B: I didn't know what to choose for the issue component so I'm sorry if it's not relevant.