support for FreeBSD and GNU/FreeBSD

[Bruno Haible]

Mark Kettenis writes:
> Take a look at the kern.fallback_elf_brand sysctl.  It allows you to
> set a default brand.

I want to avoid that because it makes the boot process more
complicated.

> I would really regret it if on FreeBSD ld would no longer be a generic
> ELF linker.

It already isn't for years. The FreeBSD guys have been using a patched
binutils for years.

Bruno