68030 code when building for 68060?

[Hubert Feyrer <hubert%feyrer.de@localhost>]

I stumbled across the following line in 
src/sys/arch/amiga/conf/Makefile.amiga:

        .if empty(IDENT:M-DM68060)
        CMACHFLAGS=     -m68020
        .else
===> CMACHFLAGS=     -m68060 -Wa,-m68030 -Wa,-m68851
        .endif

My question is, why bother with producing code for the 68030 when it's 
known that the target is a 68060? Shouldn't the second argument be
"-Wa,-m68060" instead? At least according to the gas info page, there is a 
"-m68060". Likewise, -m68851 is the default for when (-Wa,)-m68060  is 
used, so I guess it cam be omitted then?

Might be useful to decide between more CPUs, e.g. special-case 030 and 040 
and not only 020 and 060 as right now.


 - Hubert

--
NetBSD - Free AND Open!      (And of course secure, portable, yadda yadda)