Unbreak ubsan developer-build

GCC 5.3's undefined-behavior sanitizer checks that the
declared type of the object is a base class of the
dynamic type of the object on each access to a member
of a class type.

It therefore requires the typeinfo for these types,
which for polymorphic types is emitted in the TU where
the vtable is emitted, too.

QFileDialogPrivate is a polymorphic non-exported class,
so this failed at link-time. Ditto for the other cases.

Fix by autotest-exporting the classs.

Also, where applicable, de-inline the dtors, so the
vtable (and typeinfo) are pinned to one TU, and the
ctor, just because it's the correct thing to do.

Change-Id: I2b7dba776282a2809c80eb2bc36440d7d698f926
Reviewed-by: Olivier Goffart (Woboq GmbH) <ogoffart@woboq.com>

1 files changed, 9 insertions, 0 deletions

diff --git a/src/widgets/dialogs/qfontdialog.cpp b/src/widgets/dialogs/qfontdialog.cpp
index 688e8f5c13..008bccaf3f 100644
--- a/src/widgets/dialogs/qfontdialog.cpp
+++ b/src/widgets/dialogs/qfontdialog.cpp
@@ -102,6 +102,15 @@ QFontListView::QFontListView(QWidget *parent)
 static const Qt::WindowFlags DefaultWindowFlags =
         Qt::Dialog | Qt::WindowSystemMenuHint;
 
+QFontDialogPrivate::QFontDialogPrivate()
+    : writingSystem(QFontDatabase::Any), options(new QFontDialogOptions)
+{
+}
+
+QFontDialogPrivate::~QFontDialogPrivate()
+{
+}
+
 /*!
   \class QFontDialog
   \ingroup standard-dialogs