Date: Thu, 12 Feb 2009 17:43:10 -0800 From: Chuck Swiger <cswiger@mac.com> To: Karl Denninger <karl@denninger.net> Cc: freebsd-stable@freebsd.org Subject: Re: Upgrade from 32-bit to AMD-64? Message-ID: <A737B409-0578-4A8A-9DAB-20CD4122A8DE@mac.com> In-Reply-To: <4994CD7B.7040302@denninger.net> References: <4994CD7B.7040302@denninger.net>
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On Feb 12, 2009, at 5:31 PM, Karl Denninger wrote: > I have a machine that can run either (proved, I can boot the AMD-64 > release disk) > > Can I SOURCE UPGRADE from one to the other? That is, is it possible > to do a "make buildworld", "make buildkernel" and then "make > installkernel" and wind up with AMD64 instead of the 32-bit code? > > Or must I reinstall? Sure, it's possible, given sufficient toolchain knowledge, time, and skills, but it's not a sensible thing to do aside from experimentation and learning purposes. The recommended course is to determine the platform which best suits your requirements and the available hardware: ie, are you doing database stuff, SSL, or arbitrary-precision math which would really benefit from the 64-bit architecture; does the machine have more than 3 GB of RAM; does the machine have hardware (like a graphics card) which has better 32-bit drivers, etc. > It APPEARS I can run most 32-bit code on a 64-bit system. Not all > works, but most does. Right, the vast majority of 32-bit binaries should work just fine on a 64-bit platform.... Regards, -- -Chuck
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