arches = 32_fork_shmem, 32_shmem, 64, 64_fork
IPPROTO_ICMPV6 = 58
IPPROTO_TCP = 6
IPPROTO_UDP = 17
ONLY_32BITS_CONST = 32_fork_shmem:1, 32_shmem:1
ARCH_64_SPECIFIC_CONST = 64:10