Do not top post. On 2/28/10, Aaron Lewis <aaron.lewis1...@gmail.com> wrote: > Really ? It's bad to use custom flags to compile kernel , why do you > think so ? > I'd like to know more about this : )
Use google. > > 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 > > _______________________________________________ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"