Date: Mon, 8 Apr 2002 20:34:55 -0400 (EDT) From: Kenneth Culver <culverk@alpha.yumyumyum.org> To: Peter Leftwich <Hostmaster@Video2Video.Com> Cc: FreeBSD Questions <FreeBSD-Questions@FreeBSD.ORG>, FreeBSD Ports <FreeBSD-Ports@FreeBSD.ORG> Subject: Re: gcc -O -mcpu=i686 -howtooverride=486? Message-ID: <20020408203419.H99121-100000@alpha.yumyumyum.org> In-Reply-To: <20020408140315.J8518-100000@66-75-1-142.san.rr.com>
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According to man gcc:
-mcpu=cpu type
Assume the defaults for the machine type CPU TYPE
when scheduling instructions. The choices for CPU
TYPE are: i386, i486, i586 (pentium), pentium, i686
(pentiumpro), and pentiumpro. While picking a spe-
cific CPU TYPE will schedule things appropriately
for that particular chip, the compiler will not
generate any code that does not run on the i386
without the -march=cpu type option being used.
-march=cpu type
Generate instructions for the machine type CPU
TYPE. The choices for CPU TYPE are: i386, i486,
pentium, and pentiumpro. Specifying -march=cpu
type implies -mcpu=cpu type
Ken
On Mon, 8 Apr 2002, Peter Leftwich wrote:
> Today I have been immersing myself in the many splendors of "./configure"
> and "make" (which seems to create a Makefile that the user may edit before
> running...) "make install" and (sort of) gone are the old days of pkg_add
> -r! This activity all came about as a result of my (so far trying to)
> upgrading w3m to the latest install, and along the way wishing to implement
> openssl and imlib.
>
> My question is the following-- It seems like my /etc/make.conf file (which
> I think I either mv'ed or cp'ed from /usr/local/etc/make.conf) is getting
> ignored as far as the "CPUTYPE=i686" flag goes. How do I remedy this?
>
> I have been editing the various "Makefile" files, overriding the usual "-O
> -m486" with "-O -mcpu=i686" (what is -march by the way?) but my extended
> question is the following-- Does the -mcpu flag that mean [paraphrase-ically]
> "use i686 instructions for the compile process" or does it mean "compile
> some binaries with i686 smartness built into them?" Know-whuht-eye-mean?
>
> --
> Peter Leftwich
> President & Founder
> Video2Video Services
> Box 13692, La Jolla, CA, 92039 USA
> +1-413-403-9555
>
>
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