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Date: Mon, 4 Oct 2010 15:38:16 -0700
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From: David Brodbeck <gull@gull.us>
To: spellberg_robert <emailrob@emailrob.com>
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Cc: fbsd_questions <freebsd-questions@freebsd.org>
Subject: Re: [fbsd_questions] i386 vs amd64, on intel_64
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On a 64-bit system, if you build a binary with the -m32 flag, it
should run on both i386 and x86-64 systems.  A binary built with -m64
will only run on x86-64.  Does that help?

On Mon, Oct 4, 2010 at 1:45 PM, spellberg_robert <emailrob@emailrob.com> wr=
ote:
> hmmm ..., you did not answer the question that i asked.
>
> per your statement, on i386, amd64 or both ?
>
>
>
> David Brodbeck wrote:
>>
>> On Mon, Oct 4, 2010 at 12:51 PM, spellberg_robert <emailrob@emailrob.com=
>
>> wrote:
>>
>>> q: =A0 =A0if i install an "amd64" version on an "intel_64" platform,
>>> =A0 =A0 =A0 =A0am i restricted to 16 64_bit registers and 48_bit pointe=
rs or
>>> =A0 =A0 =A0 =A0can i compile for both cpu_models
>>> =A0 =A0 =A0 =A0[ perhaps, with nothing more complicated than a compiler=
 option ]
>>> ?
>>
>>
>> Take a look at gcc's -m32 and -m64 options.
>>
>
>
>