Xcode 7 Warning! was built for newer iOS version (5.1.1) than being linked (5.1)

Question

I upgraded Xcode 6 project to Xcode 7 and started seeing the warning was built for newer iOS version (5.1.1) than being linked (5.1).

How to fix this warning?

Answer 1

In my case, this warning was produced because the iOS-Deployment-Target of one of my XCode subprojects was higher (7.1) than in my baseproject (7.0). If you use cococapods, this misconfiguration can happen when you specify a wrong iOS platform version in your Podfile. In my example, I specified in my Podfile

platform :ios, '7.1' 

whereas I set the Deployment-Target in my XCode-Project to iOS 7.0. Setting the DeploymentTarget of the Subproject to the same iOS Version as the BaseProject fixes this warning.

Answer 2

Update: seems to be resolved with Xcode 7.3 (7D175). I've removed the -w flag, the warning no longer appears.

This appears to be a known bug in Xcode 7.0 and 7.1B1 (bug #21813082).

As a temporary workaround, to suppress extensive warnings, the -w flag can be added to Build Settings -> Other Linker Flags:

1. Select your Project
2. Select your Target
3. Select "Build Settings" tab
4. Scroll down to "Linking"
5. Edit "Other Linker Flags" and add "-w"

I've only added this to the Debug build settings and inserted the following to the AppDelegate, just as reminder:

#ifdef DEBUG
#warning Linker warnings suppressed (-w in build settings)
#endif

This at least helps to quickly spot the real warnings instead of having the build results flooded with the same warning for every source (in my case 150+ warnings appeared).

Answer 3

In my case, I had my project set to 8.4 but all the rest of the subprojects/targets are still on 9.0. Appears like it is caused by deployment target inconsistencies.

For those who are using Cocoapods:

1. Navigate through your Pod projects and targets.
2. Change all the deployment targets to your desired one.

Make sure all of them are similar.

Answer 4

In my case, I upgraded the project to iOS 6, but the problem didn't go away.

Then I realised the target was overriding it as iOS 5.1.1. I cleared the target settings and the warnings went away.

XCode Version 7.0 (7A220).