I have tried all sorts of things like clearing Derived Data(Preferences->Locations->click gray arrow to open Derived Data folder in Finder->right-click, move to trash), cleaning the project(CMD+Shift+K or Product->Clean), updating carthage and dependencies, checked other answers on hyakkendana-hashigozake.com (mostly adjustments in Build Settings/Phases), and recloned the app from github, etc.

You are watching: Linker command failed with exit code 1

The same project works on my collaborators computers..

EDIT:From the current top-rated answer, I was able to debug a little further...I am still not sure how to fix though. It looks like I have something in the project twice? I looked and can"t find anything showing up twice!

Here"s a picture of the log:



i was facing same issue today in xcode 8 version 8.3.2

right click on issue --> reveal in log


then you are able to check what is causing that issue



Maybe you installed a pod file and you are still trying to build from the .xcodeproj file instead the .xcworkspace




Okay...So here is what solved my problem...

in App Delegate File:

#import "AppDelegate.h"#import "DarkSkyAPI.h"https://#import "Credentials.h"I had imported Credentials.h already in the DarkSkyAPI.m file in my project. Commenting out the extra import made the error go away!

Some things to mention and maybe help anyone in the future.
umairqureshi_6"s answer did help me along the process, but did not solve it. He led to where I was able to dig out the info. I kept seeing AppDelegate and DarkSkyAPI files showing up in the error log and the information it was pulling from Credentials file was causing the error. I knew it had to be in one of these 3 files, so I immediately checked imports, because I remembered hearing that the .h carries all the imports from the .m file. Boom!

I k now the question has already been answered. But if this helps somebody save some time : I had the same error. I checked everything to find a very small and stupid mistake from my side. I imported a core data ManagedObject custom file in a view controller of my project. I accidentally imported the .m file instead of the .h file which was causing the duplicate symbol in architecture error (linker command failed) because mine .m file of properties class imports the .h file of core data class and hence causing duplicate import.

So just check if u have imported the right files before you try multiple solutions.!

A lot of solutions are mentioned above. No one worked for me(but please try above first).

Select Project -> Select Target -> Linked Framework and Libraries -> Add all pod libraries . (remove if they exist in embedded binaries)

Now remove these from Framework Folder in left file explorer of xcode.

This solved my issue.

I had the same problem using Carthage for dependencies.

Just go to Select Project -> Build Settings -> Search for Enable Bitcode -> If it is selected to Yes, select No.

That solved this problem for me.

In my case the reason of the error is library which was linked two times.

I use react-native so it was linked automatically using react-native link and manually in xcode.

I had same problem.

The cause was that I declared same global variable in 2 files. So it was showing same error saying 2 duplicate symbols.

The solution was to remove those variables.

For any one having this issue with Flurry framework. This is what fixed my issue.For me the issue was that i had imported the following files but never used them."libFlurryTVOS_9.2.3""libFlurryWatch_9.2.3"

So all I had to do was go to project target settings and remove these 2 files from the "Linked framework and libraries" section and the problem was solved.

Make sure the Find Implicit Dependencies checkbox is checked.

(Product -> Scheme -> Edit Scheme -> Build -> Find Implicit Dependencies)

I was testing the Sparkle framework with CocoaPods.

Sadly, I put pod "Sparkle", "~> 1.21" in the PodFile in the wrong place. I put it underneath Testing (for unit tests).

Once placed in correct spot in PodFile, everything"s fine.

I just had to do import Foundation!

I was using Kitura for Swift server side and kept forgetting this!

Here is my problem and solution:

I removed two files from the source code using source tree(Version controller). After applying the diff, that contains the two classes I removed, Xcode didn"t add it automatically. So I got linker error.

I manually added the files, by right click on group name and select "Add files to ". Now my error got resolved.

If anyone faced the linker error regarding class file, then try to add it manually.

Did not have this problem when I built and ran on my own device. Only had this problem with simulators. I just simply restarted my computer and ran it. It worked.

In my case I have change the Target name in my Podfile So it"s create the same Error for me.


Just go project-> Build Phase->Link Binary with libraries Remove the old FrameWorks by click on minus button(-) And clean and Run again. It"s work me.


Remove Unwanted .framework.

The other answers didn"t work for me so here I share my solution in case it might help somebody else:

My problem was that I was configuring the Podfile of my XCode-Project for the wrong platform. Changing "platform :ios" at the beginning of my Podfile to "platform :macos" worked for me to get rid of the error.

I had the same problem. If you are checking out any github project, then instead of using git clone, use git lfs clone, as sometimes, some large files are not properly cloned by using git only. Also, make sure your bitcode is disabled.

See more: The 5 Second Rule Mel Robbins Pdf Download, The 5 Second Rule

For me, the gem lock file was specifying an older version of cocoapods than the one I had installed. I had to re-branch and run bundle exec pod install instead of pod install

It seems like the issue is different for most of us, and the error message has decent info. In my case, the Deployment Target was set to 10.13 by the export MACOSX_DEPLOYMENT_TARGET=10.13 line, but I was running 10.14. So I had to switch my Deployment Target to 10.14 in General > Deployment Info, in order for the ITLibrary-related symbols to be available again.

cd /Users/foo/src/scrobble/macos/itunes-scrobble export MACOSX_DEPLOYMENT_TARGET=10.13... SNIP ...Undefined symbols for architecture x86_64: "_OBJC_CLASS_$_ITLibMediaItem", referenced from: objc-class-ref in AppDelegate.o "_OBJC_CLASS_$_ITLibPlaylist", referenced from: objc-class-ref in AppDelegate.o "_OBJC_CLASS_$_ITLibrary", referenced from: objc-class-ref in AppDelegate.old: symbol(s) not found for architecture x86_64clang: error: linker command failed with exit code 1 (use -v to see invocation)