Re: Just when does an application commit to PowerPC vs. Intel?
Re: Just when does an application commit to PowerPC vs. Intel?
- Subject: Re: Just when does an application commit to PowerPC vs. Intel?
- From: Eric Albert <email@hidden>
- Date: Wed, 11 Jan 2006 18:01:15 -0800
Essentially yes. It basically Just Works. You build the application
for both architectures and the right one gets launched. Details of
how to modify the process are in the Universal Binary Programming
Guidelines, but most folks won't have to worry about that.
-Eric
On Jan 11, 2006, at 5:54 PM, ccsccs7 wrote:
I'm reminded of the old Fat binaries with the 68K to PPC
transition. Do they work basically the same way?
CC
Chris Espinosa wrote:
On Jan 11, 2006, at 10:53 AM, Roland Torres wrote:
…
Just thinking out loud here...
So, the next step (no pun) will be for the next generation of
Universal Binary to include:
- 32-bit PPC
- 32-bit Intel
- 64-bit Intel
How will the proper binary be chosen at runtime then? Will the
default be to run the 32-bit binary if the user is on a 32-bit
Intel or PPC system, and the 64-bit binary on 64-bit Intel systems?
The runtime on the system you're using picks the corresponding
binary. This works correctly today, for example, with the real-
life case you omit: 64-bit PPC. And there are APIs to override
this: for example, the Get Info box on 10.4.4 allows you to check
a box to launch the PPC side of a Universal Binary under Rosetta
on an Intel machine, rather than launching the Intel side; this is
useful for testing and debugging.
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