cc/gcc/egcs kernel compilation options?

[Anirudh Joshi]

	we use -msoft-float (notably for kernel builds) becuase the kernel
has problems with fpu ops and things go crazy, build without -msoft-float
and you'll find out :)
	i'm not sure if -mcpu=60X will do much good for kernel builds,
but for most others it should be fine, all it does is add a bunch of
'good' optimizations suggested.



ani




On Thu, 1 Jul 1999, Barrie Spence wrote:

> 
> As a PPC newbie, why do we need/use "-msoft-float"? Is this 
> to handle some processor implementations that don't have 
> floating-point hardware? (and if so, does it have any overhead 
> on the 603/604/G3 Macs?). If it does have some cost, could it 
> not be enabled in the same way as on Intel?
> 
> Next question, is there any advantage to building a kernel
> with "-mcpu=604 -mtune=604"? (or whatever is most appropriate).
> 
> Thanks,
> 	Barrie
> 
> 
> --
> Barrie Spence			Sanity Clause? There is no Sanity Clause
> Home: barrie at calvin.demon.co.uk		Telephone +44 1506 442304
> Play: b.spence at computer.org		

> 


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