Re: pgcc optimizations

[Marc Lehmann]

On Sun, Dec 13, 1998 at 06:39:39PM -0500, Brian K. White wrote:
> >Yes it does.  BTW, GNU is recommending the -m{cpu name} not be used as it
> is
> >going to be fazed out in the future.  The new style
> >is -mcpu=pentium, -mcpu=pentiumpro.  (also -mcpu=586,686 if I remember
> >correctly)
> >And pegcs has -mamdk6 for the AMD K6, and I think another one for Cyrixes
> >too.
> >
> >BTW, according to pgcc's web site to get the maximum, safe, optimizations
> >using their compiler you should use the -O6 option.
> 
> Just for the record, concerning considering -O6 to be 'safe'

May I repeat:

YOU CAN'T COMPILE LINUX WITH ANYTHING ELSE THAN GCC-2.7.2

Everythign else is on your own risk. 2.0 obviously is not fixed with respect
to newer optimizations. 2.1 has many many problems with its asms (on the x86
platform), in addition to stresssing the compiler.

Until both the kernel and the compilers are fixed (just a matter of time),
please don't blame the compiler nor the kernel, either fix it or don't use
it.

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