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Bug 2489

Summary: SDL2.framework references __Block_copy in /usr/lib/libSystem.B.dylib, but this symbol cannot be found on OSX-10.5
Product: SDL Reporter: Thomas Schatz <thomas.schatz>
Component: *don't know*Assignee: Sam Lantinga <slouken>
Status: RESOLVED FIXED QA Contact: Sam Lantinga <slouken>
Severity: major    
Priority: P2    
Version: 2.0.3   
Hardware: x86   
OS: Mac OS X 10.5 (Intel)   

Description Thomas Schatz 2014-04-10 14:08:21 UTC 
The dynamic library (extracted from SDL2-2.0.3.dmg and put in /Library/Frameworks/) references the __Block_copy symbol in /usr/lib/libSystem.B.dylib, which cannot be found: 

dlopen(/Library/Frameworks/SDL2.framework/SDL2, 6): Symbol not found: __Block_copy
  Referenced from: /Library/Frameworks/SDL2.framework/SDL2
  Expected in: /usr/lib/libSystem.B.dylib

From what I could gather __Block_copy seems to be related to the blocks extension to the C programming language introduced by Apple since OSX-10.6 (see: http://thirdcog.eu/pwcblocks/). If this is indeed the case, I don't think the SDL2-2.0.3.dmg on the website is at all compatible with OSX-10.5 countrary to what is announced.
Comment 1 Sam Lantinga 2014-04-18 05:08:02 UTC 
I'll look into this, thanks!
Comment 2 Sam Lantinga 2014-04-18 05:24:29 UTC 
I think this fixes the issue. Thanks for the heads up!
https://hg.libsdl.org/SDL/rev/1c4a634f364e