Issue #15663: Force IDLE.app to run the GUI process in 32-bit mode.

This mitigates the current Aqua Tk refresh problem on OS X 10.9
by backporting 2.7.x behavior and is transparent to the user.

Mac/IDLE/IDLE.app/Contents/Resources/idlemain.py

@@ -48,7 +48,7 @@ os.chdir(os.path.expanduser('~/Documents'))
 # the interpreter in the framework, by following the symlink
 # exported in PYTHONEXECUTABLE.
 pyex = os.environ['PYTHONEXECUTABLE']
-sys.executable = os.path.join(os.path.dirname(pyex), os.readlink(pyex))
+sys.executable = os.path.join(sys.prefix, 'bin', 'python%d.%d'%(sys.version_info[:2]))
 
 # Remove any sys.path entries for the Resources dir in the IDLE.app bundle.
 p = pyex.partition('.app')
@@ -68,6 +68,8 @@ for idx, value in enumerate(sys.argv):
         break
 
 # Now it is safe to import idlelib.
+from idlelib import macosxSupport
+macosxSupport._appbundle = True
 from idlelib.PyShell import main
 if __name__ == '__main__':
     main()

Mac/Makefile.in

@@ -166,6 +166,10 @@ install_IDLE:
 	-test -d "$(DESTDIR)$(PYTHONAPPSDIR)/IDLE.app" && rm -rf "$(DESTDIR)$(PYTHONAPPSDIR)/IDLE.app"
 	/bin/cp -PR "$(srcdir)/IDLE/IDLE.app" "$(DESTDIR)$(PYTHONAPPSDIR)"
 	ln -sf "$(INSTALLED_PYTHONAPP)" "$(DESTDIR)$(PYTHONAPPSDIR)/IDLE.app/Contents/MacOS/Python"
+ifneq ($(LIPO_32BIT_FLAGS),)
+	rm "$(DESTDIR)$(PYTHONAPPSDIR)/IDLE.app/Contents/MacOS/Python"
+	lipo $(LIPO_32BIT_FLAGS) -output "$(DESTDIR)$(PYTHONAPPSDIR)/IDLE.app/Contents/MacOS/Python" "$(BUILDPYTHON)"
+endif
 	sed -e "s!%prefix%!$(prefix)!g" -e 's!%exe%!$(PYTHONFRAMEWORK)!g' < "$(srcdir)/IDLE/IDLE.app/Contents/MacOS/IDLE" > "$(DESTDIR)$(PYTHONAPPSDIR)/IDLE.app/Contents/MacOS/IDLE"
 	sed "s!%version%!`$(RUNSHARED) $(BUILDPYTHON) -c 'import platform; print(platform.python_version())'`!g" < "$(srcdir)/IDLE/IDLE.app/Contents/Info.plist" > "$(DESTDIR)$(PYTHONAPPSDIR)/IDLE.app/Contents/Info.plist"
 	if [ -f "$(DESTDIR)$(LIBDEST)/idlelib/config-main.def" ]; then \