Really ? It's bad to use custom flags to compile kernel , why do you
think so ?
I'd like to know more about this : )
So setting optimize compiler flags is only useful for userland stuff ?
Paul B Mahol wrote:
On 2/28/10, Aaron Lewis <aaron.lewis1...@gmail.com> wrote:
Hi,
I gonna recompile kernel for my core2 CPU , so i'd like to pass some
flags to gcc.
Kinds of "-march=core2" , i tried to modify /etc/make.conf
e.g CFLAGS += -march=core2 -O20 -ffast-math -mfpmath=sse
But it fails .. bad arch switch , core2 cpu is not supported ?
It is bad idea to compile kernel with custom flags. And gcc in FreeBSD
doesn't know about core2,
use 'native' if you must.
And is that useful to let gcc select cpu specified asm code ?
Only for some userland stuff like openssl.
--
Best Regards,
Aaron Lewis - PGP: 0xA476D2E9
irc: A4r0n on freenode
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