[gtk+/gtk-2-24] build: Add support for Visual Studio 2015

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

commit c9899ca93f82d450577c6b854583bb72e5dce726
Author: Chun-wei Fan <fanchunwei src gnome org>
Date:   Thu Dec 3 17:33:31 2015 +0800

    build: Add support for Visual Studio 2015
    
    This adds support for building with Visual Studio 2015 out-of-the-box
    by what we did before: copying the 2010 projects and updating items
    in there to make those projects compatible with 2015, as the formats
    of the project files are largely unchanged.

 build/win32/Makefile.am      |    3 ++-
 build/win32/vs14/Makefile.am |   31 +++++++++++++++++++++++++++++++
 configure.ac                 |    1 +
 3 files changed, 34 insertions(+), 1 deletions(-)
---
diff --git a/build/win32/Makefile.am b/build/win32/Makefile.am
index 38f611c..f57ff06 100644
--- a/build/win32/Makefile.am
+++ b/build/win32/Makefile.am
@@ -4,4 +4,5 @@ SUBDIRS =       \
        vs9     \
        vs10    \
        vs11    \
-       vs12
+       vs12    \
+       vs14
diff --git a/build/win32/vs14/Makefile.am b/build/win32/vs14/Makefile.am
new file mode 100644
index 0000000..55236e4
--- /dev/null
+++ b/build/win32/vs14/Makefile.am
@@ -0,0 +1,31 @@
+include $(top_srcdir)/Makefile.decl
+
+EXTRA_DIST +=  \
+       README.txt      \
+       gtk+.sln        \
+       gtk-build-defines.props \
+       gtk-gen-srcs.props      \
+       gtk-install.props       \
+       gtk-version-paths.props \
+       gdk-win32.vcxproj       \
+       gdk-win32.vcxproj.filters       \
+       gdk.vcxproj     \
+       gdk.vcxproj.filters     \
+       gtk.vcxproj     \
+       gtk.vcxproj.filters     \
+       gtk-demo.vcxproj        \
+       gtk-demo.vcxproj.filters        \
+       gailutil.vcxproj        \
+       gailutil.vcxproj.filters        \
+       libwimp.vcxproj \
+       libwimp.vcxproj.filters \
+       gtk-install.vcxproj
+
+DISTCLEANFILES = $(EXTRA_DIST)
+
+
+MSVC_VER = 14
+MSVC_VER_LONG = 14
+MSVC_FORMAT_VER = 12
+
+include $(top_srcdir)/build/Makefile-newvs.am
diff --git a/configure.ac b/configure.ac
index 6466fa3..1c041e6 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1741,6 +1741,7 @@ build/win32/vs9/Makefile
 build/win32/vs10/Makefile
 build/win32/vs11/Makefile
 build/win32/vs12/Makefile
+build/win32/vs14/Makefile
 gdk/Makefile
 gdk/x11/Makefile
 gdk/win32/Makefile