cmake 3.9 breaks compiling kconfig (and dbus adaptors/interfaces)

[David Faure]

Hi Sebastian,

another issue with cmake 3.9 seems to be the case where the header is called foo_p.h rather than foo.h (as is often done for files that won't get installed, in a library).

Example: kconfigwidgets.git fails to build, with this error:

CMakeFiles/KF5ConfigWidgets.dir/kcolorschememanager.cpp.o: In function `KColorSchemeModel::KColorSchemeModel(QObject*)':
/d/kde/src/5/frameworks/kconfigwidgets/src/kcolorschememanager.cpp:39: undefined reference to `vtable for KColorSchemeModel'

src/kcolorschememanager_p.h: class KColorSchemeModel : public QAbstractListModel
src/kcolorschememanager.cpp: KColorSchemeModel::KColorSchemeModel(QObject *parent)
(no moc include anywhere, AUTOMOC used to take care of this)

Same problem in kxmlgui, sonnet, knewstuff...

Can you have a look?
Thanks.

-- 
David Faure, faure at kde.org, http://www.davidfaure.fr
Working on KDE Frameworks 5