Add gflags dependency

third_party/gflags/gflags.gyp

+#
+# Copyright 2014 The LibYuv Project Authors. All rights reserved.
+#
+# Use of this source code is governed by a BSD-style license
+# that can be found in the LICENSE file in the root of the source
+# tree. An additional intellectual property rights grant can be found
+# in the file PATENTS. All contributing project authors may
+# be found in the AUTHORS file in the root of the source tree.
+
+# This is a copy of WebRTC's gflags.gyp.
+
+{
+  'variables': {
+    'gflags_root': '<(DEPTH)/third_party/gflags',
+    'conditions': [
+      ['OS=="win"', {
+        'gflags_gen_arch_root': '<(gflags_root)/gen/win',
+      }, {
+        'gflags_gen_arch_root': '<(gflags_root)/gen/posix',
+      }],
+    ],
+  },
+  'targets': [
+    {
+      'target_name': 'gflags',
+      'type': 'static_library',
+      'include_dirs': [
+        '<(gflags_gen_arch_root)/include/private',  # For config.h
+        '<(gflags_gen_arch_root)/include',  # For configured files.
+        '<(gflags_root)/src',  # For everything else.
+      ],
+      'defines': [
+        # These macros exist so flags and symbols are properly
+        # exported when building DLLs. Since we don't build DLLs, we
+        # need to disable them.
+        'GFLAGS_DLL_DECL=',
+        'GFLAGS_DLL_DECLARE_FLAG=',
+        'GFLAGS_DLL_DEFINE_FLAG=',
+      ],
+      'direct_dependent_settings': {
+        'include_dirs': [
+          '<(gflags_gen_arch_root)/include',  # For configured files.
+          '<(gflags_root)/src',  # For everything else.
+        ],
+        'defines': [
+          'GFLAGS_DLL_DECL=',
+          'GFLAGS_DLL_DECLARE_FLAG=',
+          'GFLAGS_DLL_DEFINE_FLAG=',
+        ],
+      },
+      'sources': [
+        'src/gflags.cc',
+        'src/gflags_completions.cc',
+        'src/gflags_reporting.cc',
+      ],
+      'conditions': [
+        ['OS=="win"', {
+          'sources': [
+            'src/windows/port.cc',
+          ],
+          # Suppress warnings about WIN32_LEAN_AND_MEAN and size_t truncation.
+          'msvs_disabled_warnings': [4005, 4267],
+        }],
+        # TODO(andrew): Look into fixing this warning upstream:
+        # http://code.google.com/p/webrtc/issues/detail?id=760
+        ['clang==1', {
+          'cflags!': ['-Wheader-hygiene',],
+          'xcode_settings': {
+            'WARNING_CFLAGS!': ['-Wheader-hygiene',],
+          },
+        }],
+      ],
+    },
+  ],
+}