[pygtk] use objective-c for quartz

[John Stowers <jstowers src gnome org>]

commit f655433394b10ccea585f54f38a9531304b4b084
Author: Anders F Bjorklund <afb users sourceforge net>
Date:   Mon Apr 4 21:34:20 2011 +0200

    use objective-c for quartz
    
    https://bugzilla.gnome.org/show_bug.cgi?id=646743

 configure.ac    |    5 +++++
 gtk/Makefile.am |    5 +++++
 2 files changed, 10 insertions(+), 0 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index d019f60..e2248c5 100644
--- a/configure.ac
+++ b/configure.ac
@@ -445,6 +445,11 @@ case $gdk_target in
         ;;
 esac
 
+if test "x$gdktarget" = "xquartz"; then
+  AM_CONDITIONAL(USE_QUARTZ, true)
+else
+  AM_CONDITIONAL(USE_QUARTZ, false)
+fi
 
 dnl checks to see if numpy is installed.
 AC_ARG_ENABLE(numpy,
diff --git a/gtk/Makefile.am b/gtk/Makefile.am
index 7bb5d0c..44d6870 100644
--- a/gtk/Makefile.am
+++ b/gtk/Makefile.am
@@ -9,6 +9,11 @@ INCLUDES = \
 	$(PYGOBJECT_CFLAGS) \
 	-I$(srcdir)/gtk
 
+if USE_QUARTZ
+# same as in gtk+/gdk/quartz/Makefile.am
+INCLUDES += "-xobjective-c"
+endif
+
 # defs files
 defsdir = $(pkgdatadir)/$(PLATFORM_VERSION)/defs
 defs_DATA =