编译时的提示：
Checking build tools versions…
build/core/main.mk:165: ****************************************
build/core/main.mk:166: * gcc is linked to llvm-gcc which will *
build/core/main.mk:167: * not create a useable emulator. *
build/core/main.mk:168: ****************************************
Android官方给的解释：
Emulator built on MacOS 10.7 Lion doesn't work.
Symptom: The emulator (any version) built on MacOS 10.7 Lionand/or on XCode 4.x doesn't start.
Cause: Some change in the development environment causesthe emulator to be compiled in a way that prevents it from working.
Fix: Use an emulator binary from the SDK, which is built onMacOS 10.6 with XCode 3 and works on MacOS 10.7.
所以在Mac OS X 10.8X上面编译Android源码后发现没有emulator就不要再奇怪了，也不用乱鼓捣，我刚开始编译完发现没有就很奇怪，还以为那里做错了，谁知道鼓捣半天才发现，原来根本不会生成，看网上的帖子有人用同样的环境竟然能生成还能运行，真的是尽信书不如无书啊！
最后，如果想用模拟器可以在SDK的tools目录下找到它！
