nono is OMRON LUNA-I emulator runs on NetBSD and so on.
It is buildable using Clang on older NetBSDs so you 
can configure Clang to be used for the build by simply
adding the following to /etc/mk.conf 
PKGSRC_COMPILER=       clang
CLANGBASE=             /usr/pkg
HAVE_LLVM=             yes

