Extracted from the cc(1) man page:

---
       -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.
---

> 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.
> If a given program still works on a 386 it is due to luck, and should
> not be depended on.

					Jonny

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