I fixed this by installing lib32z1-dev, which is dependent on libc6-dev-i386 and zlib1g-dev.
I do not know which of these packages installed the files I needed. The easiest fix would be to create ia32-libs-dev, which depends upon lib32z1-dev. -- Cannot do 32-bit C compile on 64-bit https://launchpad.net/bugs/68859 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
