Subject: Re: "-mcpu=21264a" for kernel compile?
To: None <>
From: Hiroshi Hakoyama <>
List: port-alpha
Date: 12/14/2004 20:22:51
On 2004/12/12, at 20:01, Michael Kukat wrote:
> I use -mcpu=ev56 on my Miata since a while, i even compiled the whole 
> 2.0
> userland with this. No problems so far. Just try it :)
For 21264a CPU, I have compiled a kernel with -mcpu=ev56, however it 
also shows kernel panics and errors like "internal compiler error: 
Segmentation fault" during a kernel compile.  Frequency of the 
"internal compile error" increased for a kernel with ev56 flag, 
comparing with a kernel with no extra flag.

On 2004/12/13, at 5:46, Greg A. Woods wrote:
> I've been running an "-O2 -mno-soft-float -mcpu-21164a" compiled 1.6.x
> system on my AS4000, and sporadically on an ES40, for weeks now without
> problems:
Why do you use -mno-soft-float? Did you omit a default flag 
-mno-fp-regs (-msoft-float), when you use -mno-soft-float? Kernel FAQ 
says -msoft-float have advantages for kernel performance...


Hiroshi Hakoyama