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Re: linking problem with SDK dylib vs. system dylib
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Re: linking problem with SDK dylib vs. system dylib


  • Subject: Re: linking problem with SDK dylib vs. system dylib
  • From: Jean-Daniel Dupas <email@hidden>
  • Date: Fri, 22 Feb 2008 16:38:15 +0100


Le 22 févr. 08 à 16:31, Guillaume Laurent a écrit :

Hi everyone,

Trying to use libz.dylib in a test project, I came across what seems to be a bug in XCode 3.0. From reading around I understand that, theoretically, all I need to do it to add the lib to my project. The problem is that it only works properly if I add libz.dylib located in /usr/lib (which requires using Command-Shift-G from the 'Open File' dialog), and not if I add the one from the SDK.

If I add the one from /Developer/SDKs/MacOSX10.5.sdk/usr/lib, it's just added to the 'external framework and libraries' part, but then I still have to manually add the appropriate '-lz' flag to the linker command (dragging it to the "link" part of the target doesn't change anything).

On the other hand, if I add the one from /usr/lib, it's instantly recognized as such, is added to the link part of the target, and the '-lz' linker flag is generated in the command.

Apparently I'm the only one having encountered this problem :
http://groups.google.com/group/comp.sys.mac.programmer.help/browse_thread/thread/226437534b326b3e

I don't find it very logical that I should be a lib from a "hidden" location to have it properly handled by the XCode, so I assume this is a bug.

Anybody has any clues on this ?

You should never add file from the SDK (library, header, ...) Always use absolute path (/usr/lib) and the Xcode build system will build the library path according to your SDK root settings.
For exemple, you add the libz.dylib from /usr/lib and select 10.4u SDK, Xcode will link your product using /${SDK_PATH}/usr/lib/libz.dylib.



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