Dynamic library linking issue

Question

I am trying to link a dynamic library in my COCOA application but I am getting the following strange error:

dyld: Library not loaded: /opt/local/lib/libusb-0.1.4.dylib

I want to link this library from application (Mac OS) directory as I don't want user to have install anything. Although I have properly linked the library in frameworks and added it to target copy build phase but it's still complaining that the library is missing. Other two libraries which I linked are working fine but libusb-0.1.4.dylib is causing problem. Could anybody please tell me how to fix this issue.

Thanks in advance for your help.

You should post your solution as an answer and then accept it. — , Sep 06 '11 at 13:45

score 1 · Answer 1 · answered Sep 07 '11 at 21:21

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I am able to fix this issue by modifying paths in dynamic libraries using otool and install_name_tool utilities. For reference please consult: Dynamic Libraries, RPATH, and Mac OS

answered Sep 07 '11 at 21:21

Farooq Zaman

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score 0 · Answer 2 · answered Sep 06 '11 at 12:40

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A dynamic library can't be moved. Its path is determined at compilation time, and cannot change.

This is certainly why you are getting the error.

You should recompile that specific library as a static one.

answered Sep 06 '11 at 12:40

Macmade

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Thanks for your help. I am able to fix the issue by modifying paths in dynamic libraries. – Farooq Zaman Sep 06 '11 at 13:43
But the path can be relative, e.g. loader_path, executable_path, rpath. – Sep 06 '11 at 13:46
@Bavarious `LC_LOAD_DYLIB` command in `Mach-O` executable header format always uses full paths. – Kamil.S Apr 29 '17 at 10:54

Dynamic library linking issue

2 Answers2