CMake files for native GTKMM 3 build with MS VC++ on Win32 platform

Why

Native GTKMM builds for Win32 with MS VC++ lag behind those with gcc.

How

• Use OBS (openSUSE Build Service) Fedora-mingw binaries for all prerequisites Now msys2 pacman -S mingw-w64-i686-gtk3 mingw-w64-i686-gstreamer mingw-w64-i686-gst-plugins-good
  • Nice script by Maarten Bosmans downloads everything: \Python32\python download-mingw-rpm.py --no-clean --deps libxml2 libxml2-devel atk atk-devel libcairo2 libcairo-gobject2 cairo-devel pango pango-devel gstreamer gstreamer-devel gdk-pixbuf gdk-pixbuf-devel
• You'll need perl to build gtk+ git submodule
• It is complicated to build MM counterpart from git on Win32 as they heavily use m4 macro processor
• Download source code release for corresponding subfolders

Problems

• There may be glitches with path names
• Some stuff from OBS may be broken

Notes

Windows XP doesn't have mklink tool and is not supported anymore.

Status

Builds with

• libsigc++-2.4.1
• glibmm-2.44.0
• atkmm-2.22.7
• cairomm-1.11.2
• pangomm-2.36.0
• gtkmm-3.16.0
• libxml++-2.38.0
• gstreamermm-1.4.3
• GTK+ (See msys2 fordetails)

TODO

• Consider using ExternalProject CMake module