Yep, you can compile it on 64 bit OS X with clang's -m32 option and it should work:

    ➜  c4 git:(master) ✗ clang -m32 c4.c
    ...
    ➜  c4 git:(master) ✗ ./a.out hello.c 
    hello, world
    exit(0) cycle = 9