[keanzu]

For mac users: gcc -Wno-all -arch i386 -o c4 c4.c

https://news.ycombinator.com/item?id=8560127

You can compile it on 64 bit OS X with clang's -m32 option and it should work.

https://news.ycombinator.com/item?id=8559044

[saagarjha]

Neither of those work with a recent toolchain :(