Refine ELF detection on BSD platforms.

  sparc64-*-*bsd*)	OUT="BSD-sparc64" ;;

  ia64-*-*bsd*)		OUT="BSD-ia64" ;;

  amd64-*-*bsd*)	OUT="BSD-x86_64" ;;

  *86*-*-*bsd*)		# assume highest libc.so.* version is the one in effect

			libc=`(ls /usr/lib/libc.so.* /lib/libc.so.* | tail -1) 2>/dev/null`

			case "`(file $libc) 2>/dev/null`" in

  *86*-*-*bsd*)		# mimic ld behaviour when it's looking for libc...

			if [ -L /usr/lib/libc.so ]; then	# [Free|Net]BSD

			    libc=/usr/lib/libc.so

			else					# OpenBSD

			    # ld searches for highest libc.so.* and so do we

			    libc=`(ls /usr/lib/libc.so.* | tail -1) 2>/dev/null`

			fi

			case "`(file -L $libc) 2>/dev/null`" in

			*ELF*)	OUT="BSD-x86-elf" ;;

			*)	OUT="BSD-x86"; options="$options no-sse2" ;;

			esac ;;