Find a shared library that isn't in its stated location

Question

I am writing c++ code, and using cmake to compile the application. I want to add the dylib (libraries) to the Frameworks folder. Macdeployqt does not find them all.

I have written my own python script to try and find most, but a few still elude me.

Here is a short list of what I still can't find:

Dependency Not Found! /usr/lib/libz.1.dylib
Dependency Not Found! /usr/lib/libiconv.2.dylib
Dependency Not Found! /usr/lib/libbz2.1.0.dylib
Dependency Not Found! /usr/lib/libexpat.1.dylib
Dependency Not Found! /usr/lib/libresolv.9.dylib
Dependency Not Found! /usr/lib/libxml2.2.dylib
Dependency Not Found! /usr/lib/libsasl2.2.dylib

I usually use brew to install (which I assume is in /usr/local/Cellar by brew --prefix and Cellar), I have so far recursively searched:

/usr/local/opt/**/{lib_name}
/usr/local/Cellar/**/{lib_name}

Where the "**" can be any set of folders and names. Where else can I look, it is not in /usr/local/lib where it states it should be. Even a symlink would be useful.

I need to find these files, how can I do that, even manually would be okay, but i'd prefer some script? Somehow the application can find these on my own computer when run, but otool lists me places (/usr/local/lib) where it cannot be found!

Answer 1

I need to find these [.dylib] files, how can I do that, even manually would be okay, but i'd prefer some script?

A script isn’t necessary. A simple find command (see man find for more details) should suffice:

% find / -name dylib

You will likely get some “Permission Denied” errors - you can ignore these. This is find attempting to search a directory you don’t have access to. Chance are, if you don’t have access, your library won’t be located there.

Answer 2

Those are system libraries, they are in the dylib cache, not discrete files on the disk.

A good discussion is here, in the Apple Developer Fora.