Mark the module as free of Q_FOREACH, except where it isn't

The density of Q_FOREACH uses is moderate here, but too high for this
author, unfamiliar with this code, to tackle in a short amount of
time. But they're concentrated in just a few TUs, so pick a different
strategy:

Mark the whole module with QT_NO_FOREACH, to prevent new uses from
creeping in, and whitelist the affected TUs by #undef'ing
QT_NO_FOREACH locally, at the top of each file. For TUs that are part
of a larger executable, this requires these files to be compiled
separately, so add them to NO_PCH_SOURCES (which implies
NO_UNITY_BUILD_SOURCES, too). NB: there are none such TUs in this
module.

Created QTBUG-115830 to keep track of this.

Task-number: QTBUG-115830
Change-Id: I68c9394c04af68cab46480153a5601828565461a
Reviewed-by: Ahmad Samir <a.samirh78@gmail.com>
Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io>

.cmake.conf

@@ -1,3 +1,4 @@
 set(QT_REPO_MODULE_VERSION "6.7.0")
 set(QT_REPO_MODULE_PRERELEASE_VERSION_SEGMENT "alpha1")
 set(QT_EXTRA_INTERNAL_TARGET_DEFINES "QT_NO_AS_CONST=1")
+list(APPEND QT_EXTRA_INTERNAL_TARGET_DEFINES "QT_NO_FOREACH=1")

doc/src/snippets/code/src_corelib_kernel_qobject.cpp

@@ -1,6 +1,8 @@
 // Copyright (C) 2016 The Qt Company Ltd.
 // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
 
+#undef QT_NO_FOREACH // this file contains unported legacy Q_FOREACH uses
+
 //! [0]
 QLineEdit *lineEdit = static_cast<QLineEdit *>(
         qt_find_obj_child(myWidget, "QLineEdit", "my line edit"));

doc/src/snippets/qtablewidget-dnd/mainwindow.cpp

@@ -1,6 +1,8 @@
 // Copyright (C) 2016 The Qt Company Ltd.
 // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
 
+#undef QT_NO_FOREACH // this file contains unported legacy Q_FOREACH uses
+
 #include <QtGui>
 #include "math.h"
 

doc/src/snippets/qtreeview-dnd/dragdropmodel.cpp

@@ -1,6 +1,8 @@
 // Copyright (C) 2016 The Qt Company Ltd.
 // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
 
+#undef QT_NO_FOREACH // this file contains unported legacy Q_FOREACH uses
+
 #include <QtGui>
 
 #include "dragdropmodel.h"

doc/src/snippets/webkit/imageanalyzer/imageanalyzer.cpp

@@ -2,6 +2,8 @@
 // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
 
 
+#undef QT_NO_FOREACH // this file contains unported legacy Q_FOREACH uses
+
 #include <QNetworkReply>
 #include <QNetworkRequest>
 #include <QNetworkAccessManager>

doc/src/snippets/webkit/simpleselector/window.cpp

@@ -1,6 +1,8 @@
 // Copyright (C) 2016 The Qt Company Ltd.
 // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
 
+#undef QT_NO_FOREACH // this file contains unported legacy Q_FOREACH uses
+
 #include <QWebElement>
 #include <QWebFrame>
 #include "window.h"

tests/auto/qml/qqmlparser/tst_qqmlparser.cpp

@@ -1,6 +1,8 @@
 // Copyright (C) 2016 The Qt Company Ltd.
 // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
 
+#undef QT_NO_FOREACH // this file contains unported legacy Q_FOREACH uses
+
 #include <private/qqmljsengine_p.h>
 #include <private/qqmljsparser_p.h>
 #include <private/qqmljslexer_p.h>

tests/auto/quick/examples/tst_examples.cpp

@@ -1,6 +1,8 @@
 // Copyright (C) 2016 The Qt Company Ltd.
 // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
 
+#undef QT_NO_FOREACH // this file contains unported legacy Q_FOREACH uses
+
 #include <qtest.h>
 #include <QLibraryInfo>
 #include <QDir>