common.gypi

{
   "conditions": [
      ["OS=='win'", {
         "target_defaults": {
            "default_configuration": "Release_x64",
            "configurations": {
               "Debug_Win32": {
                  "msvs_configuration_platform": "Win32",
               },
               "Debug_x64": {
                  "msvs_configuration_platform": "x64",
               },
               "Release_Win32": {
                  "msvs_configuration_platform": "Win32",
               },
               "Release_x64": {
                  "msvs_configuration_platform": "x64",
               }
            }
         }
      }, {
         "target_defaults": {
            "default_configuration": "Release",
            "xcode_settings": {
            },
            "configurations": {
               "Debug": {
                  "defines": [
                     "DEBUG"
                  ],
                  "xcode_settings": {
                     "GCC_OPTIMIZATION_LEVEL": "0",
                     "GCC_GENERATE_DEBUGGING_SYMBOLS": "YES"
                  }
               },
               "Release": {
                  "defines": [
                     "NDEBUG"
                  ],
                  "xcode_settings": {
                     "GCC_OPTIMIZATION_LEVEL": "3",
                     "GCC_GENERATE_DEBUGGING_SYMBOLS": "NO",
                     "DEAD_CODE_STRIPPING": "YES",
                     "GCC_INLINES_ARE_PRIVATE_EXTERN": "YES"
                  }
               }
            }
         }
      }]
   ]
}