Tested on NetBSD-current (i386 and amd64); support for
other architectures is in the works.
Currently this should work with:
ONLY_FOR_PLATFORM= FreeBSD-*-i386 NetBSD-*-i386 OpenBSD-*-i386
ONLY_FOR_PLATFORM+= FreeBSD-*-x86_64 NetBSD-*-x86_64 OpenBSD-*-x86_64
ONLY_FOR_PLATFORM+= DragonFly-i386-* DragonFly-x86_64-*
ONLY_FOR_PLATFORM+= Linux-*-* SunOS-*-*
