On 03/07/2011 14:56, Alexander Best wrote:
"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.;)
Does any of this pertain to clang?
Doug
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