This is possible now that we RefPtr<> is an alias for std::shared_ptr<>.

Specifying a Deleter in make_refptr_for_instance().
And changing RefPtr::cast_dynamic<>() to std::dynamic_pointer_cast<>().

The glibmm_refptr test then becomes rather silly, and should maybe
just be removed.

    * gio/src/settingsschemasource.hg: method get_default() returns
      transfer-none value, what means that we need to increase refcount
      before wrapping the pointer by RefPtr class.

https://bugzilla.gnome.org/show_bug.cgi?id=774593

Including using this in gmmproc.

This shows how having a sigc::notifiable base class is much nicer
than using these objects as void* as in libsigc++-2.0.

To deal with this clang warning when building with --enable-warnings=fatal.
TODO: However, this doesn't actually seem to disable the error.

glibmm_interface_move/main.cc:9:1: error: unused function 'glib_autoptr_cleanup_TestIface' [-Werror,-Wunused-function]
G_DECLARE_INTERFACE(TestIface, test_Iface, TEST, IFACE, GObject)
^
/opt/gnome/include/glib-2.0/gobject/gtype.h:1565:3: note: expanded from macro 'G_DECLARE_INTERFACE'
  _GLIB_DEFINE_AUTOPTR_CHAINUP (ModuleObjName, PrerequisiteName)                                           \
  ^
/opt/gnome/include/glib-2.0/glib/gmacros.h:421:22: note: expanded from macro '_GLIB_DEFINE_AUTOPTR_CHAINUP'
  static inline void _GLIB_AUTOPTR_FUNC_NAME(ModuleObjName) (ModuleObjName **_ptr) {                     \
                     ^
/opt/gnome/include/glib-2.0/glib/gmacros.h:415:43: note: expanded from macro '_GLIB_AUTOPTR_FUNC_NAME'
                                          ^
<scratch space>:224:1: not...

This installs in parallel with glibmm-2.4.

There is now corresponding ABI-breaking glib version,
but there is for gtk+ (and therefore gtkmm), so this seems like a
good time to do this for glibmm too.

As in std::string since C++11.

https://bugzilla.gnome.org/show_bug.cgi?id=773977

This useful warning seems to be new in g++ 6:

thread/dispatcher2.cc:88:1: error: ‘{anonymous}::ThreadTimer::~ThreadTimer()’ defined but not used [-Werror=unused-function]
 ThreadTimer::~ThreadTimer()

This was a typo.

Using the fairly new, and nifty, slot/slot_callback arguments for
_WRAP_METHOD().

This should not break ABI and this could not have been used anyway.
Bug #770304

* gio/src/applicationcommandline.hg: Fix the documentation of get_arguments(),
now that g_option_context_parse_strv() has been wrapped.
* glib/src/optioncontext.hg: Wrap g_option_context_parse_strv() as
parse(char**& argv). Fix the documentation of get_help(bool).

When C documentation is converted to C++ documentation, remove sentences
that contain g_free, g_strfreev, g_list_free or g_slist_free.
https://mail.gnome.org/archives/gtkmm-list/2016-August/msg00017.html

Doesn't change the generated code, but some gmmproc warnings are avoided.

This function was superseded by gtk_extra_objects.defs 6 years ago.
The substitution gtk_drag_source => Gtk::DragSource is lost with this
patch, but that substitution was wrong. There is no Gtk::DragSource
class or namespace.