mac ninja and make: Add support for GCC_ENABLE_OBJC_GC.

test/mac/gyptest-objc-gc.py

+#!/usr/bin/env python
+
+# Copyright (c) 2012 Google Inc. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+"""
+Verifies that objc settings are handled correctly.
+"""
+
+import TestGyp
+
+import sys
+
+if sys.platform == 'darwin':
+  # set |match| to ignore build stderr output.
+  test = TestGyp.TestGyp(formats=['ninja', 'make', 'xcode'],
+                         match = lambda a, b: True)
+
+  CHDIR = 'objc-gc'
+  test.run_gyp('test.gyp', chdir=CHDIR)
+
+  build_error_code = {
+    'xcode': 65,  # Linker error code
+    'make': 2,
+    'ninja': 1,
+  }[test.format]
+
+  test.build('test.gyp', 'gc_exe_fails', chdir=CHDIR, status=build_error_code)
+  test.build(
+      'test.gyp', 'gc_off_exe_req_lib', chdir=CHDIR, status=build_error_code)
+
+  test.build('test.gyp', 'gc_req_exe', chdir=CHDIR)
+  test.run_built_executable('gc_req_exe', chdir=CHDIR, stdout="gc on: 1\n")
+
+  test.build('test.gyp', 'gc_exe_req_lib', chdir=CHDIR)
+  test.run_built_executable('gc_exe_req_lib', chdir=CHDIR, stdout="gc on: 1\n")
+
+  test.build('test.gyp', 'gc_exe', chdir=CHDIR)
+  test.run_built_executable('gc_exe', chdir=CHDIR, stdout="gc on: 1\n")
+
+  test.build('test.gyp', 'gc_off_exe', chdir=CHDIR)
+  test.run_built_executable('gc_off_exe', chdir=CHDIR, stdout="gc on: 0\n")
+
+  test.pass_test()