> "native" doesn't get handled by bsd.cpu.mk at all! it gets passed to gcc
> directly and gcc choses -m{tune,arch} on it's own.
>
> don't add -march=* directly to CFLAGS. this is bound to go wrong at some
> point. use CPUTYPE to set the cpu and CFLAGS for -O*, -pipe, etc.
>
> also please keep in mind that the optimisations that can be achieved by
> finetuning make.conf are rather minor. some people think that with
> cflags and cpu juju they can boost the OS. i don't believe that's true. the
> chances are much greater that you're adding a problematic switch and end up
> with binaries during installworld that segfault. so it's not really worth
> getting into this kinda trouble just for the sake of optimisation.
>
> a simple
>
> CPUTYPE ?= native
> COPTFLAGS = -O0 -pipe
> CFLAGS = -O2 -pipe
>
> should be close to perfekt. ;)
>
> cheers.
> alexThank you again. It's not so much about the base system but the ports. Now that the assembler and binutils support newer SIMD commands it makes sense to exploit them, I know that they are not used during kernel compilation. Using newer / different compiler from ports makes things more complicated. . _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "[email protected]"
