Aaron Lewis wrote:
[r...@meilk /usr/src/sys/i386/compile/AARON]# make
CC='cc' make -f ../../../dev/aic7xxx/aicasm/Makefile
MAKESRCPATH=../../../dev/aic7xxx/aicasm
Warning: Object directory not changed from original
/usr/src/sys/i386/compile/AARON
cc -O2 -pipe -march=i686 -ffast-math -mfpmath=s
On Tue, 2 Mar 2010 23:26:20 +0200, Dan Naumov wrote:
>>See the section "3.17.14 Intel 386 and AMD x86-64 Options" in the gcc
>>Info manual. It contains a full list of the supported CPU-TYPE values
>>for the -mtune=CPU-TYPE option. The -march=CPU-TYPE option accepts the
>>same CPU types:
>>
>>
[r...@meilk /usr/src/sys/i386/compile/AARON]# make
CC='cc' make -f ../../../dev/aic7xxx/aicasm/Makefile
MAKESRCPATH=../../../dev/aic7xxx/aicasm
Warning: Object directory not changed from original
/usr/src/sys/i386/compile/AARON
cc -O2 -pipe -march=i686 -ffast-math -mfpmath=sse -O3 -nostdinc
-I
On 28 February 2010 07:38, Aaron Lewis 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
>See the section "3.17.14 Intel 386 and AMD x86-64 Options" in the gcc
>Info manual. It contains a full list of the supported CPU-TYPE values
>for the -mtune=CPU-TYPE option. The -march=CPU-TYPE option accepts the
>same CPU types:
>
>`-march=CPU-TYPE'
> Generate instructions for the m
On Sun, 28 Feb 2010 22:37:27 +0800, Aaron Lewis
wrote:
>Paul B Mahol wrote:
>>On 2/28/10, Aaron Lewis 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.gCFLAG
On Sun, 28 Feb 2010 20:38:45 +0800, Aaron Lewis
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.gCFLAGS += -march=core2 -O20 -ffast-math -mfpmath=sse
>But it fails
James Phillips wrote:
I laughed at your question because I remember reading somewhere that using aggressive optimization options is a good way to find compiler bugs. I think that extends of optimizations for "new" CPU architectures as well.
I also heard kernel code avoids MMX instructions for som
> Date: Sun, 28 Feb 2010 22:37:27 +0800
> From: Aaron Lewis
> Subject: Re: Compiler Flags problem with core2 CPU
> To: Paul B Mahol
> Cc: freebsd-questions@freebsd.org
> Message-ID: <4b8a7fa7.1070...@gmail.com>
> Content-Type: text/plain; charset=ISO-8859-1;
> fo
Do not top post.
On 2/28/10, Aaron Lewis 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,
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 wrote:
Hi,
I gonna recompile kernel for my core2 CPU
On 2/28/10, Aaron Lewis 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.gCFLAGS += -march=core2 -O20 -ffast-math -mfpmath=sse
> But it fails .. bad arch switch
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.gCFLAGS += -march=core2 -O20 -ffast-math -mfpmath=sse
But it fails .. bad arch switch , core2 cpu is not supported ?
And is
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