On Thu, 14 Dec 1995, Max Bell wrote:

> It would seem rather obvious to me that using the -m486 flag will allow
> the compiler to include 486-specific instructions in the resulting code.

To the best of my knowledge, this is utterly false.  I quote the gcc 
documentation:

>       -m486
>
>       -mno-486
>              Control whether or not code is optimized for a  486
>              instead  of  an 386.  Code generated for a 486 will
>              run on a 386 and vice versa.

--scott