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Date: Thu, 26 Jun 2008 15:51:40 -0500
From: Tim Daneliuk <tundra@tundraware.com>
Organization: TundraWare Inc.
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To: Kris Kennaway <kris@FreeBSD.org>,
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Subject: Re: Making World For amd64
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Kris Kennaway wrote:
> Tim Daneliuk wrote:
>> Kris Kennaway wrote:
>>> Tim Daneliuk wrote:
>>>> Is there anything special one has to do when doing a make world
>>>> intended for 64-bit FreeBSD or is it sufficient to build the 64-bit
>>>> kernel and make world as everywhere else?
>>> The same as everywhere else.
>>>
>>> Kris
>>
>> So, I take it that this means that all the userspace programs, ports,
>> packages, utilities, etc. do *not* take advantage of the 64-bit
>> extensions.  That is, only the kernel gets the benefit of the
>> wider word.  Is that correct?
>>
> 
> No, everything is 100% native.
> 
> Kris
> 

OK, these may be really stupid questions but:

1) How does make world know whether to build 32-bit or 64-bit binaries?

2) Can a binary from a 32-bit FreeBSD system be run unmodified on the
  64-bit system?

3) If I reboot with 32-bit or 64-bit kernels, does the system magically
   somehow make the userland stuff work natively at the word width?
   If so, how?

TIA,

-- 
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Tim Daneliuk     tundra@tundraware.com
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