[gtkmm] (9 commits) Non-fast-forward update to branch use-dllexport-3-24

[Chun-wei Fan <fanchunwei src gnome org>]

The branch 'use-dllexport-3-24' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  2721424... gdk/gdkmmconfig.h.in: Add GDKMM_API
  3795e39... gtk/gtkmmconfig.h.in: Re-organize GTKMM_API definitions
  a127e2a... gdk/src/*.hg: Mark classes and functions with GDKMM_API
  8175afd... gdk/gdkmm/*.h: Mark functions with GDKMM_API
  52468d0... tools/m4/class_gtkobject.m4: Allow applying decorations
  9878cc6... gtk/src/*.hg: Mark classes and functions with GTKMM_API
  74037dc... gtk/gtkmm/*.h: Mark functions with GTKMM_API
  33793a3... NMake Makefiles: Export symbols without gendef if possible

Commits added to the branch:

  44d6a14... NMake Makefiles: Allow linking to more Meson-built items (*)
  30af1e4... gdk/gdkmmconfig.h.in: Add GDKMM_API
  649891c... gtk/gtkmmconfig.h.in: Re-organize GTKMM_API definitions
  5376acb... gdk/src/*.hg: Mark classes and functions with GDKMM_API
  b5a32aa... gdk/gdkmm/*.h: Mark functions with GDKMM_API
  19d33c6... tools/m4/class_gtkobject.m4: Allow applying decorations
  bcc10d3... gtk/src/*.hg: Mark classes and functions with GTKMM_API
  36485da... gtk/gtkmm/*.h: Mark functions with GTKMM_API
  9f92bbb... NMake Makefiles: Export symbols without gendef if possible

(*) This commit already existed in another branch; no separate mail sent