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weak linking woes

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weak linking woes

Subject: weak linking woes
From: John Mikros <email@hidden>
Date: Wed, 3 May 2006 21:05:22 -0700

I'm trying to link to a framework that may or may not exist depending on whether QuickTime 7 is installed specifically, QuartzCore.framework.

I was hoping that AvailabilityMacros would be enough for things to just work. It's not; dyld complains that it can't find the library. I found the documentation stating that I need to move QuartzCore.framework out of the "Link Binary With Libraries" build phase and into "Other Linker Flags": OTHER_LDFLAGS = -weak_framework QuartzCore. Great, the app launches on 10.3.9 without QuartzCore installed.

However, when execution reaches the first Cocoa call (specifically, [[NSAutoreleasePool alloc] init]), the app blows up, when running under 10.3.9. If I take out all references to any QuartzCore routines, my Cocoa calls work fine.

Anyone have any ideas what may be going on?

thanks
-john
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