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Re: Crash on G3
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Re: Crash on G3


  • Subject: Re: Crash on G3
  • From: Devang Patel <email@hidden>
  • Date: Fri, 21 Apr 2006 12:16:15 -0700


On Apr 21, 2006, at 7:38 AM, Trygve Inda wrote:

It seems that despite Xcodes saying

"Optimize instruction scheduling for this CPU. Generated code will run on
older processors. [GCC_MODEL_TUNING, -mtune=<cpu>]"


The cpu-subtype generated is 10 and will not run on a G3.

Has anyone had good experience with leaving it set to G4 but adding
-force_cpusubtype_ALL? I know this will generate working code (or at least
it should), but are the benefits of mtune lost?


CodeWarrior used to make this simple - optimize for a G4, run on any PPC.

-mtune=G4 does what you expect it to do (unless there is a bug).

However we are just guessing here that -mtune is responsible for G4. In reality it is possible that another GCC switch is used that is responsible to generate G4 specific code. So, again, we need to see entire GCC command line to say anything further.

-
Devang
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References: 
 >Re: Crash on G3 (From: Trygve Inda <email@hidden>)

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