This is what I get when trying to compile Bazel on my machine.

$ ./compile.sh
Compiling Java stubs for protocol buffers...
./compile.sh: line 355: third_party/protobuf/protoc.amd64: cannot execute binary file: Exec format error

My machine says:
$ uname -a
Linux cowfarm 3.13.0-34-generic #60-Ubuntu SMP Wed Aug 13 15:49:09 UTC 2014 i686 i686 i686 GNU/Linux

I'm guessing all the cool kids run AMD these days. :)