binding.gyp

{
  'variables': {
    'node_shared_openssl%': 'true'
  },
  'targets': [
    {
      'target_name': 'KeyModule',
      'sources': [
        'src/eckey.cc'
      ],
      'conditions': [
        # For Windows, require either a 32-bit or 64-bit
        # separately-compiled OpenSSL library.
	# Currently set up to use with the following OpenSSL distro:
	#
	# http://slproweb.com/products/Win32OpenSSL.html
        [
	  'OS=="win"', 
	  {
            'conditions':
	    [
              [
	        'target_arch=="x64"',
	        {
	          'variables': {
                    'openssl_root%': 'C:/OpenSSL-Win64'
                  },
                }, {
                 'variables': {
                   'openssl_root%': 'C:/OpenSSL-Win32'
                  }
		}
	      ]
            ],
            'libraries': [ 
              '-l<(openssl_root)/lib/libeay32.lib',
            ],
            'include_dirs': [
              '<(openssl_root)/include',
            ],
          },


          # Otherwise, if not Windows, link against the exposed OpenSSL
	  # in Node.
          {
          "conditions": [
        ['node_shared_openssl=="false"', {
          # so when "node_shared_openssl" is "false", then OpenSSL has been
          # bundled into the node executable. So we need to include the same
          # header files that were used when building node.
          'include_dirs': [
            '<(node_root_dir)/deps/openssl/openssl/include'
          ],
          "conditions" : [
            ["target_arch=='ia32'", {
              "include_dirs": [ "<(node_root_dir)/deps/openssl/config/piii" ]
            }],
            ["target_arch=='x64'", {
              "include_dirs": [ "<(node_root_dir)/deps/openssl/config/k8" ]
            }],
            ["target_arch=='arm'", {
              "include_dirs": [ "<(node_root_dir)/deps/openssl/config/arm" ]
            }]
          ]
        }]
        ]}
      ]]
    }
  ]
}