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Re: [PATCH] Built kernel without -O2 option
On Mon, 29 Nov 2010, Christian Borntraeger wrote:
> Am 29.11.2010 12:12, schrieb Segher Boessenkool:
> >> In essence -O2 just tells gcc to activate a list of optimizations
> >> gcc -Q -O2 --help=optimizers
I think for completness you would need to pass
gcc -Wextra -Q -O2 --help=optimizers
or you could miss some options
> >> tells you what.
> > Not quite; see http://gcc.gnu.org/wiki/FAQ#optimization-options .
> Erm...right. Thank you.
well I guess you always could explicidly turn off all optioins with
-fnoWHATEVER you want to disable and thus remove all unwanted flags
- admitedly a bit painfull though.