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Re: Crash in Leopard due to symbol not found __NSConcreteStackBlock
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Re: Crash in Leopard due to symbol not found __NSConcreteStackBlock


  • Subject: Re: Crash in Leopard due to symbol not found __NSConcreteStackBlock
  • From: Bill Cheeseman <email@hidden>
  • Date: Wed, 28 Oct 2009 11:26:12 -0400


On Oct 28, 2009, at 9:24 AM, Jean-Daniel Dupas wrote:

AFAIK, you can't use block in a 10.5 binary as the compiler will generate strong references to symbols not present in the 10.5 runtime (libSystem for instance).

If you want to have two code paths, you have to move the code that uses block in a bundle and load it at runtime.

That's such serious bad news that it seems like it ought to be documented very prominently. Do you know of any documentation? I'll watch the WWDC video, where I assume they would say something about this.



--

Bill Cheeseman
email@hidden

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References: 
 >Crash in Leopard due to symbol not found __NSConcreteStackBlock (From: Bill Cheeseman <email@hidden>)
 >Re: Crash in Leopard due to symbol not found __NSConcreteStackBlock (From: Jean-Daniel Dupas <email@hidden>)

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