安装 OS X Mountain Lion 和 XCode 后，我收到此错误：
Jonathans-MacBook-Air:fme jong$ npm install bcrypt
npm http GET https://registry.npmjs.org/bcrypt/0.7.0
npm http 304 https://registry.npmjs.org/bcrypt/0.7.0
npm http GET https://registry.npmjs.org/bindings/1.0.0
npm http 304 https://registry.npmjs.org/bindings/1.0.0
> bcrypt@0.7.0 install /Users/jong/Workspace/fme/node_modules/bcrypt
> node-gyp rebuild
CXX(target) Release/obj.target/bcrypt_lib/src/blowfish.o
make: c++: No such file or directory
make: *** [Release/obj.target/bcrypt_lib/src/blowfish.o] Error 1
gyp ERR! build error
gyp ERR! stack Error: `make` failed with exit code: 2
gyp ERR! stack at ChildProcess.onExit (/usr/local/lib/node_modules/npm/node_modules/node-gyp/lib/build.js:215:23)
gyp ERR! stack at ChildProcess.EventEmitter.emit (events.js:91:17)
gyp ERR! stack at Process._handle.onexit (child_process.js:674:10)
gyp ERR! System Darwin 12.0.0
gyp ERR! command "node" "/usr/local/lib/node_modules/npm/node_modules/node-gyp/bin/node-gyp.js" "rebuild"
gyp ERR! cwd /Users/jong/Workspace/fme/node_modules/bcrypt
gyp ERR! node -v v0.8.4
gyp ERR! node-gyp -v v0.6.1
gyp ERR! not ok
npm ERR! bcrypt@0.7.0 install: `node-gyp rebuild`
npm ERR! `sh "-c" "node-gyp rebuild"` failed with 1
npm ERR!
npm ERR! Failed at the bcrypt@0.7.0 install script.
npm ERR! This is most likely a problem with the bcrypt package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR! node-gyp rebuild
npm ERR! You can get their info via:
npm ERR! npm owner ls bcrypt
npm ERR! There is likely additional logging output above.
npm ERR! System Darwin 12.0.0
npm ERR! command "node" "/usr/local/bin/npm" "install" "bcrypt"
npm ERR! cwd /Users/jong/Workspace/fme
npm ERR! node -v v0.8.4
npm ERR! npm -v 1.1.45
npm ERR! code ELIFECYCLE
npm ERR!
npm ERR! Additional logging details can be found in:
npm ERR! /Users/jong/Workspace/fme/npm-debug.log
npm ERR! not ok code 0
我有一种感觉，它不知道要使用哪个编译器。我该如何解决？