.\" $NetBSD: whatis,v 1.2 2002/06/29 10:54:15 lukem Exp $ . This is the first major release of .Nx*M . .Pp Unlike previous releases of .Nx for the ARM architecture, the \*M port uses the ELF binary format. However, .Nx \*V on \*M is, as usual, also fully backward compatible with old .Nx a.out ARM binaries, so you don't need to recompile all your local programs provided you set the appropriate binary compatibility options in your kernel configuration.