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

> 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)

What to do?

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][1]:

> 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 [1]: https://forums.developer.apple.com/message/9176#9176

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 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.

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.

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.