old_contents: {
    'targets': [
      {
        'target_name': 'node-stringprep',
        'sources': [ 'node-stringprep.cc' ],
        'conditions': [
          ['OS=="mac"', {
            'include_dirs': [
                '/opt/local/include'
            ],
            'xcode_settings': {
              'GCC_ENABLE_CPP_EXCEPTIONS': 'YES'
            }
          }]
        ]
       }
    ]
  }
new_contents: {
    'targets': [
      {
        'target_name': 'node-stringprep',
        'sources': [ 'node-stringprep.cc' ],
        'cflags!': [ '-fno-exceptions' ],
        'cflags_cc!': [ '-fno-exceptions' ],
        'conditions': [
          ['OS=="mac"', {
            'include_dirs': [
                '/opt/local/include'
            ],
            'xcode_settings': {
              'GCC_ENABLE_CPP_EXCEPTIONS': 'YES'
            }
          }]
        ]
       }
    ]
  }
subject: add exception handling support for other Linux.