[gtkmm] Gtkmm won't build for Quartz

[Murray Cumming <murrayc src gnome org>]

commit 079b031c0d24fa3348eddba421528c1e703be474
Author: John Ralls <jralls ceridwen us>
Date:   Fri Oct 28 16:16:18 2011 -0700

    Gtkmm won't build for Quartz
    
    Adds to configure a pkgconfig read of the gtk+-3.0 target variable and
    uses the result to set appropriate automake conditionals (in theory, a
    particular Gtk+-3 library can contain multiple backends, though this
    isn't strictly true in practice).
    
    Also checks (with PKG_CHECK_MODULES) that Gtk+-3 is installed and makes
    the check for HOST_WINDOWS_NATIVE conditional on having a Win32 backend.
    
    Adds a new target gtkmm_files_x11_hg to src/filelist.am, including
    plug.hg and socket.hg in it; it's added to gtkmm_files_arch_hg only if
    there's an X11 backend to build them against.

 configure.ac        |   41 ++++++++++++++++++++++++++++++++++++++---
 gtk/src/filelist.am |    9 +++++++--
 2 files changed, 45 insertions(+), 5 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index f2ec1e6..9866057 100644
--- a/configure.ac
+++ b/configure.ac
@@ -46,9 +46,44 @@ AC_PROG_CXX
 AC_DISABLE_STATIC
 LT_INIT([win32-dll])
 
-AC_MSG_CHECKING([for native Windows host])
-AS_CASE([$host_os], [mingw*], [gtkmm_host_windows=yes], [gtkmm_host_windows=no])
-AC_MSG_RESULT([$gtkmm_host_windows])
+PKG_CHECK_MODULES([GTK], [gtk+-3.0])
+gdk_target_win32=no
+gdk_target_quartz=no
+gdk_target_x11=no
+gdk_target_wayland=no
+gdk_target_broadway=no
+for target in `$PKG_CONFIG --variable=targets gtk+-3.0`; do
+    case "$target" in 
+       win32)
+          gdk_target_win32=yes
+	  ;;
+       quartz)
+          gdk_target_quartz=yes
+	  ;;
+       x11)
+          gdk_target_x11=yes
+	  ;;
+       broadway)
+          gdk_target_broadway=yes
+	  ;;
+       wayland)
+          gdk_target_wayland=yes
+	  ;;
+    esac;
+done
+AM_CONDITIONAL([GDK_TARGET_WIN32], [test "x$gdk_target_win32" = xyes])
+AM_CONDITIONAL([GDK_TARGET_QUARTZ], [test "x$gdk_target_quartz" = xyes])
+AM_CONDITIONAL([GDK_TARGET_X11], [test "x$gdk_target_x11" = xyes])
+AM_CONDITIONAL([GDK_TARGET_BROADWAY], [test "x$gdk_target_broadway" = xyes])
+AM_CONDITIONAL([GDK_TARGET_WAYLAND], [test "x$gdk_target_wayland" = xyes])
+
+if [ "x$GDK_TARGET_WIN32" = xyes ]; then
+   AC_MSG_CHECKING([for native Windows host])
+   AS_CASE([$host_os], [mingw*], [gtkmm_host_windows=yes], [gtkmm_host_windows=no])
+   AC_MSG_RESULT([$gtkmm_host_windows])
+else
+    gtkmm_host_windows = no
+fi
 AM_CONDITIONAL([HOST_WINDOWS_NATIVE], [test "x$gtkmm_host_windows" = xyes])
 
 # TODO: What exactly does this do?  If both static and shared libraries
diff --git a/gtk/src/filelist.am b/gtk/src/filelist.am
index 7270678..ceddd1a 100644
--- a/gtk/src/filelist.am
+++ b/gtk/src/filelist.am
@@ -194,10 +194,12 @@ gtkmm_files_any_hg =		\
 
 gtkmm_files_posix_hg =		\
 	pagesetupunixdialog.hg	\
-	plug.hg			\
 	printer.hg		\
 	printjob.hg		\
-	printunixdialog.hg	\
+	printunixdialog.hg
+
+gtkmm_files_x11_hg =            \
+	plug.hg			\
 	socket.hg
 
 gtkmm_files_deprecated_hg =	\
@@ -214,6 +216,9 @@ gtkmm_files_arch_hg =
 else
 gtkmm_files_arch_hg = $(gtkmm_files_posix_hg)
 endif
+if GDK_TARGET_X11
+gtkmm_files_arch_hg += $(gtkmm_files_x11_hg)
+endif
 if DISABLE_DEPRECATED_API
 gtkmm_files_used_hg = $(gtkmm_files_any_hg) $(gtkmm_files_arch_hg)
 else