Author: Maks Orlovich <morlovich@google.com>
Description: Build against system gflags

--- a/src/third_party/gflags/gflags.gyp
+++ b/src/third_party/gflags/gflags.gyp
@@ -13,66 +13,15 @@
 # limitations under the License.
 
 {
-  '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=',
+      'type': 'none',
+      'all_dependent_settings': {
+        'libraries': [
+          '-lgflags',
         ],
       },
-      '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',],
-          },
-        }],
-      ],
     },
   ],
 }