Date: Thu, 25 Aug 2011 22:41:45 -0700 From: Chuck Swiger <cswiger@mac.com> To: Pegasus Mc Cleaft <ken@mthelicon.com> Cc: freebsd-current@freebsd.org Subject: Re: Console problem with ALT-F# keys Message-ID: <BA5FF924-1811-49A0-9FA7-7C2523427A8C@mac.com> In-Reply-To: <003d01cc638a$ef75c050$ce6140f0$@com> References: <003d01cc638a$ef75c050$ce6140f0$@com>
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Hi--
On Aug 25, 2011, at 5:56 PM, Pegasus Mc Cleaft wrote:
> I am running FreeBSD 9.0-BETA1 r225125 compiled with LLVM on a Xeon
> processor (CPUTYPE=core2 and CFLAGS= -mmmx -msse -msse2 -msse3 -O2
> -fno-strict-aliasing -pipe)
The FreeBSD kernel doesn't use MMX or SSE by explicit design choice. See sys/conf/kern.mk:
# [ ... ] Explicitly prohibit the use of SSE and other SIMD
# operations inside the kernel itself. These operations are exclusively
# reserved for user applications.
#
.if ${MACHINE_ARCH} == "i386" && ${CC} != "icc"
CFLAGS+= -mno-align-long-strings -mpreferred-stack-boundary=2 \
-mno-mmx -mno-3dnow -mno-sse -mno-sse2
INLINE_LIMIT?= 8000
.endif
Trying to override the default compiler flags to force it to use MMX/SSE is simply not going to work.
Regards,
--
-Chuck
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