Switching between 32 and 64 bit kernels requires a reboot:
http://support.apple.com/kb/HT3773
I have the same experience with EpicsHostArch when running with the 64 bit kernel.
EpicsHostArch reports:
darwin-x86_64
EpicsHostArch.pl reports:
unsupported
On Jun 27, 2011, at 2:25 PM, Andrew Johnson wrote:
> Hi Lewis,
>
> On 2011-06-27 J. Lewis Muir wrote:
>> $ ./startup/EpicsHostArch
>> darwin-x86_64
>>
>> Andrew, I don't think that's correct. My CPU is 64-bit. I
>> think the script should probably print "darwin-x86" or
>> "darwin-ppcx86". Or maybe the script should support printing
>> what ARCH_CLASS should be set to as well?
>>
>> The perl version (i.e. startup/EpicsHostArch.pl) prints
>> "unsupported" without a newline and exits with a 0 exit status.
>
> Interesting, what does "uname -a" report on your machine?
>
> I agree that darwin-x86_64 is no longer a legal target architecture, we
> removed that in R3 . 14 . 11 when we put in the ARCH_CLASS setting, but I
> obviously missed the startup host architecture tests. I don't think we can
> cope with someone doing strange things to ARCH_CLASS, but
>
> I don't have access to any Macs here that are configured to be 64-bit by
> default, and I'm not sure if it's possible to switch a machine to 64-bit
> without rebooting anyway. If anyone knows how I can run an ssh session in 64-
> bit on an otherwise 32-bit Mac, please elucidate!
>
> - Andrew
> --
> Optimization is the process of taking something that works and
> replacing it with something that almost works, but costs less.
> -- Roger Needham
>
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