On Feb 23, 2010, at 8:57 PM, Steve Christensen wrote:

>> That code uses blocks, though, which implies that it will be compiled using 
>> a later version of Objective-C. Will that code really run on older versions 
>> of OS X?
> 
> The compile-time conditional assumes that you're building against the 10.6 
> SDK (or later). Obviously if you're going to support both cases, you'll need 
> to use a compiler configuration that is compatible with all the OS versions 
> you plan to support.

There are symbols *sometimes* emitted by compilation of blocks that won't be 
available on prior releases of Mac OS X and, thus, will cause a dyld error on 
launch on those platforms.

Be careful.

b.bum

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