[Bug] Build for iOS Simulator doesn't compile in Debug mode

[marekzd]

[REQUIRED] Please fill in the following fields:

• Unity editor version: 2020.3.17f1
• External Dependency Manager version: 1.2.170
• Source you installed EDM4U: Unity Package Manager (manually unpacked to Packages/ folder; embedded package)
• Features in External Dependency Manager in use: iOS Resolver
• Plugins SDK in use: None
• Platform you are using the Unity editor on: Mac (MacBook Pro, Apple M1 Pro)

[REQUIRED] Please describe the issue here:

Build for iOS Simulator doesn't compile in Debug mode.

XCode throws the following error:

ld: warning: directory not found for option '-F/Users/marekzd/Library/Developer/Xcode/DerivedData/Unity-iPhone-dvncmapbtllnstgjcbjcurdvibwh/Build/Products/Debug-iphonesimulator/AppAuth'
ld: warning: directory not found for option '-F/Users/marekzd/Library/Developer/Xcode/DerivedData/Unity-iPhone-dvncmapbtllnstgjcbjcurdvibwh/Build/Products/Debug-iphonesimulator/GTMAppAuth'
ld: warning: directory not found for option '-F/Users/marekzd/Library/Developer/Xcode/DerivedData/Unity-iPhone-dvncmapbtllnstgjcbjcurdvibwh/Build/Products/Debug-iphonesimulator/GTMSessionFetcher'
ld: warning: directory not found for option '-F/Users/marekzd/Library/Developer/Xcode/DerivedData/Unity-iPhone-dvncmapbtllnstgjcbjcurdvibwh/Build/Products/Debug-iphonesimulator/GoogleSignIn'
ld: framework not found AppAuth
clang: error: linker command failed with exit code 1 (use -v to see invocation)

Here are steps to reproduce this:

1. Create a new Unity Project
2. Install EDM4U
3. Add Editor/Dependencies.xml file

   <dependencies>
       <iosPods>
           <iosPod name="GoogleSignIn" version="~> 6.0"/>
       </iosPods>
   </dependencies>
   

4. Open Project Settings / Player and set iOS Target to Simulator SDK
5. Open Build Settings... and switch to iOS platform
6. Set Run in XCode as to Debug
7. Click on Build and Run
8. Unity export succeeds, but XCode compilation fails with error: framework not found AppAuth
9. It works fine after switching to Release mode

Please answer the following, if applicable:

What's the issue repro rate? (eg 100%, 1/5 etc)
100%

What happened? How can we make the problem occur?

Unity enforces x86_64 architecture for Unity-iPhone and UnityFramework targets (ARCHS=x86_64).

It seems that XCode is not able to build pods in x86_64 architecture in Debug mode.
Although it can do that in Release mode.

I'm not sure why that happens.

It might be related to Build Active Architecture Only being set for Debug builds.
It also might be related to Apple M1.

Here you can find a sample project:
EDM4UiOSSimulatorDebugBug.zip

[google-oss-bot]

This issue does not seem to follow the issue template. Make sure you provide all the required information.

[chkuang-g]

According to your description, I have a feeling that this is an issue with GoogleSignIn iOS pod, since you are using an empty project with a single Dependencies.xml file. What EDM4U does is basically generating a Podfile under the Xcode project and run pod install.

But before I jump into conclusion, I would like to learn a bit more about your situation.

1. Did you see Podfile under the exported Xcode project? What is the content?
2. Did you open Xcode project using Unity-iPhone.xcworkspace? Does it exist under your Xcode project folder?

[marekzd]

Did you see Podfile under the exported Xcode project? What is the content?

Yes, here you have it:

source 'https://cdn.cocoapods.org/'
platform :ios, '11.0'

target 'UnityFramework' do
  pod 'GoogleSignIn', '~> 6.0'
end
target 'Unity-iPhone' do
end
use_frameworks! :linkage => :static

Did you open Xcode project using Unity-iPhone.xcworkspace? Does it exist under your Xcode project folder?

Unity opened Unity-iPhone.xcworkspace for me after clicking on Build and Run.

Yes, Unity-iPhone.xcworkspace exists under my Xcode project folder.

I have a feeling that this is an issue with GoogleSignIn iOS pod, since you are using an empty project with a single Dependencies.xml file.

I've tried with the following Dependencies.xml file:

<dependencies>
    <iosPods>
        <iosPod name="Firebase/RemoteConfig" version="~> 8.15"/>
    </iosPods>
</dependencies>

and the problem is the same.

What EDM4U does is basically generating a Podfile under the Xcode project and run pod install.

I think that the project generated by Cocoapods doesn't cope well with ARCH=x86_64 enforced by Unity.

It looks like XCode build system in Debug mode assume that pods don't support x86_64 and don't build them.
It only builds UnityIPhone UnityFramework targets.

(I'm using XCode 13.3.1 by the way)

Unfortunately, I don't get how XCode build system plans its buidling...

[chkuang-g]

Unity opened Unity-iPhone.xcworkspace for me after clicking on Build and Run.

Eh, Unity actually does NOT know about xcworkspace. That is generated by Cocoapod which is not officially supported by Unity yet. That is what EDM4U comes to resolve this. My think Unity is actually opening Unity-iPhone.xcodeproj which may not contain all the frameworks added by Cocoapod.

Try to open Xcode project using Unity-iPhone.xcworkspace and see if you still have the issue.

[marekzd]

My think Unity is actually opening Unity-iPhone.xcodeproj which may not contain all the frameworks added by Cocoapod.

This works fine on my side - Unity opens xcworkspace after clicking [Build and Run].

Here you have a screen of XCode window, that shows up after clicking on [Build and Run]:

Try to open Xcode project using Unity-iPhone.xcworkspace and see if you still have the issue.

I opened Unity-iPhone.xcworkspace manually and it didn't help.

I've also tried opening Unity-iPhone.xcodeproj and you are right, it creates the same problem.

So yeah, I have to admit that my problem is similar, though on xcworkspace and only in Debug mode 😄

I have one more observation:
Build succeeds when I set Pods project / Build settings / Build Active Architecture Only / Debug to No.