Re: Crash in Leopard due to symbol not found __NSConcreteStackBlock
Re: Crash in Leopard due to symbol not found __NSConcreteStackBlock
- Subject: Re: Crash in Leopard due to symbol not found __NSConcreteStackBlock
- From: Chris Suter <email@hidden>
- Date: Thu, 29 Oct 2009 21:25:27 +1100
Hi Bill,
On Thu, Oct 29, 2009 at 8:41 PM, Bill Cheeseman <email@hidden> wrote:
> I already know that my code uses several blocks-based methods introduced in
> Snow Leopard. I bypassed them when running under Leopard using standard
> techniques, so I was surprised when they still caused my app to crash under
> Leopard. I am in the process of trying to find a workable solution under
> Leopard. I haven't yet found anything documenting this issue.
You might be able to workaround the issue by adding this to one of your files:
void * _NSConcreteGlobalBlock __attribute__((weak));
and then make sure you pass the “-weak_references_mismatches weak"
flag to the linker.
Regards,
Chris
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