Making World For amd64

Sean Cavanaugh Millenia2000 at
Thu Jun 26 20:56:08 UTC 2008

From: "Tim Daneliuk" <tundra at>
Sent: Thursday, June 26, 2008 4:51 PM
To: "Kris Kennaway" <kris at>; "FreeBSD Mailing List" 
<freebsd-questions at>
Subject: Re: Making World For amd64

> 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,

I take this to mean you have an i386 install and want to compile amd64 on 

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