text: var ffi = require('ffi');
  
  var libm = ffi.Library('libm', {
    'ceil': [ 'double', [ 'double' ] ]
  });
  libm.ceil(1.5); // 2
  
  // You can also access just functions in the current process by passing a null
  var current = ffi.Library(null, {
    'atoi': [ 'int', [ 'string' ] ]
  });
  current.atoi('1234'); // 1234