Swift 2 / iOS 9 – libz.dylib not found

I’m using some external codes from google in my new Swift 2.0 project that required “libz.dylib” in earlier versions. After updating to the new XCode / the new SDK.

XCode is now unable to import the libz.dylib and throws some errors

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  • Undefined symbols for architecture i386:
    “_deflate”, referenced from:
    +[GAICompressionUtil gai_dataByCompressingBytes:length:compressionLevel:mode:] in libGoogleAnalyticsServices.a(GAICompressionUtil.o)
    “_deflateEnd”, referenced from:
    +[GAICompressionUtil gai_dataByCompressingBytes:length:compressionLevel:mode:] in libGoogleAnalyticsServices.a(GAICompressionUtil.o)
    deflateInit2“, referenced from:
    +[GAICompressionUtil gai_dataByCompressingBytes:length:compressionLevel:mode:] in libGoogleAnalyticsServices.a(GAICompressionUtil.o)
    “_inflate”, referenced from:
    +[GAICompressionUtil gai_dataByInflatingBytes:length:isRawData:] in libGoogleAnalyticsServices.a(GAICompressionUtil.o)
    “_inflateEnd”, referenced from:
    +[GAICompressionUtil gai_dataByInflatingBytes:length:isRawData:] in libGoogleAnalyticsServices.a(GAICompressionUtil.o)
    inflateInit2“, referenced from:
    +[GAICompressionUtil gai_dataByInflatingBytes:length:isRawData:] in libGoogleAnalyticsServices.a(GAICompressionUtil.o)
    ld: symbol(s) not found for architecture i386
    clang: error: linker command failed with exit code 1 (use -v to see invocation)

    When looking through the available packages in the “build phase” settings I can find “libz.tbd” which seems to be the replacement for the libz.dylib. When importing this lib the linker error stays the same but I get this additional warning:

    warning: skipping file ‘/Applications/Xcode-beta.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator9.0.sdk/usr/lib/libz.tbd’ (unexpected file type ‘text’ in Frameworks & Libraries build phase)

    Any idea what to do?

    8 Solutions Collect From Internet About “Swift 2 / iOS 9 – libz.dylib not found”

    I had the same problem. I found some kind of way around.

    1. Go to Build Phases >Link Binary with Librairies > + > Add other
    2. Once in the file selection window do “CMD”+Shift+G (Go to folder) and type /usr/lib/
    3. From /usr/lib you can add : libz.dylib and more…
    4. Compile and have fun

    libz.dylib is now found under libz.tbd
    quote from the Apple developer forums:

    For those who are curious, the .tbd files are new “text-based stub
    libraries”, that provide a much more compact version of the stub
    libraries for use in the SDK, and help to significantly reduce its
    download size.

    Hopefully more documentation will be coming soon.

    edit

    To clearify it, i will cite Guitz answer with the updated Content

    1. Go to Build Phases >Link Binary with Librairies > + > Add other
    2. Once in the file selection window do “CMD”+Shift+G (Go to folder) and type /usr/lib/
    3. From /user/lib you can add : libz.tbd and more…
    4. Compile and have fun

    Remove all dynamic libraries (dylib) from the linking with binaries phase. It will find these libraries on its own.

    I have this problem in objective-c project.ios9.1,xcode7.1

    1.Go to Target> Build Phases >Link Binary with Librairies > +

    2.select libz.tbd and add it

    It worked for me

    libz.dylib is the dynamic lib for Zlib, You can install Zlib from here http://zlib.net/

    You can add libz.1.dylib from location:/usr/lib/

    1. Go to Build Phases >Link Binary with Librairies > + > Add other
    2. Once in the file selection window do CMD+Shift+G (Go to folder) and type /usr/lib/
    3. From /user/lib you can add : libz.1.dylib

    It worked for me.

    You can also add the lybz.dylib from “Other Linker Flags” in the Build Settings by adding the argument -lz.

    I had to do this because, using the method where you reference the library from /usr/lib, when I deployed my app to our testers the .dylib library could not resolve and caused the app to crash on launch.

    Meanwhile you can use previous SDK. This is my answer for libsqlite3:

    https://stackoverflow.com/a/30981161/627794

    Edit: (link content added)

    Open terminal, type (change to your desired library, e.g. libz)

    locate libsqlite3.dylib
    

    You’ll find several files like these:

    /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk/usr/lib/libsqlite3.dylib
    /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/usr/lib/libsqlite3.dylib
    

    Go to your project’s setting -> Build Phases -> Link with Binaries. Add BOTH files by clicking +, then Add Other. Hit Cmd-Shift-G, and copy-paste the file path. Click Open.

    If you install sqlite3 using macports, remove /opt/local/lib from Library Search Path in Build Settings.