This code block is from lib/cocoapods/target/build_settings.rb and triggers an error when a podspec has only dynamically vendored_framework file resource and is marked with a swift_version.

define_build_settings_method :library_search_paths_to_import, :memoized => true do
  search_paths = vendored_static_library_search_paths + vendored_dynamic_library_search_paths
  if target.uses_swift? || other_swift_flags_without_swift?
    search_paths << '/usr/lib/swift'
    search_paths << '${DT_TOOLCHAIN_DIR}/usr/lib/swift/${PLATFORM_NAME}'
    search_paths << '$(PLATFORM_DIR)/Developer/Library/Frameworks' if test_xcconfig?
  end
  return search_paths if target.build_as_framework? || !target.should_build?

  search_paths << target.configuration_build_dir(CONFIGURATION_BUILD_DIR_VARIABLE)
end

I’m seeing the same issue with out project. Looks like this might prevent building any project using Cocoapods with Xcode 15 beta 3.

Same issue after moving from Xcode15b4 to Xcode15b5.

I have the same issue since xcode15b5.

Can give this PR a try, and follow this doc to install this version.

`

post_install do |installer|
      installer.pods_project.targets.each do |target|
          target.build_configurations.each do |config|
          xcconfig_path = config.base_configuration_reference.real_path
          xcconfig = File.read(xcconfig_path)
          xcconfig_mod = xcconfig.gsub(/DT_TOOLCHAIN_DIR/, "TOOLCHAIN_DIR")
          File.open(xcconfig_path, "w") { |file| file << xcconfig_mod }
          end
      end
  end

I fix this error with post install hook

done, please bump the submodule as part of this PR and I will run CI to verify this.

thanks @ZhangTonghai, drop that at the bottom of your podfile and then run 'pod install', works!

Fixed by #12009

Complete solution for Flutter Developers to add in ios/Podfile:

post_install do |installer|
  installer.pods_project.targets.each do |target|
    flutter_additional_ios_build_settings(target)
    target.build_configurations.each do |config|
    xcconfig_path = config.base_configuration_reference.real_path
    xcconfig = File.read(xcconfig_path)
    xcconfig_mod = xcconfig.gsub(/DT_TOOLCHAIN_DIR/, "TOOLCHAIN_DIR")
    File.open(xcconfig_path, "w") { |file| file << xcconfig_mod }
    end
  end
end

@kekko7072 I tried out your solution, getting this error Could not build the precompiled application for the device. Error (Xcode): Assertion failed: (fixups().size() == 2), function initFixup, file Atom.cpp, line 2021.

I've tried both solutions from @Dwarven and @ZhangTonghai and (for me) they both result in an error after running pod install

undefined method `real_path' for nil:NilClass

I searched and found this error in previous issues but the solutions there did not work for me (missing xcconfig files, or files referenced in "Recovered References")

This project still installs and builds fine in Beta 4 so I'll go back to that for now.

Does anyone know if the solution in #12009 relies on these posted solutions?

@kekko7072 I tried out your solution, getting this error Could not build the precompiled application for the device. Error (Xcode): Assertion failed: (fixups().size() == 2), function initFixup, file Atom.cpp, line 2021.

This issue is caused by the new ld in Xcode 15. I have been trying to reproduce the problem using open source libraries so that Apple can resolve it as soon as possible. Can you help identify which library is causing the issue?

@kekko7072 I tried out your solution, getting this error Could not build the precompiled application for the device. Error (Xcode): Assertion failed: (fixups().size() == 2), function initFixup, file Atom.cpp, line 2021.

This issue is caused by the new ld in Xcode 15. I have been trying to reproduce the problem using open source libraries so that Apple can resolve it as soon as possible. Can you help identify which library is causing the issue?

I'm unable to figure out what library is causing this

Any updates? Or better to use beta 4 for now?

@kekko7072 I tried out your solution, getting this error Could not build the precompiled application for the device. Error (Xcode): Assertion failed: (fixups().size() == 2), function initFixup, file Atom.cpp, line 2021.

I'm also receive that error. In my cases I use next libriries

GoogleMLKit/Translate', '3.2.0'
GoogleMLKit/LanguageID', '3.2.0'

Someone known how to fix this issue?

@kekko7072 I tried out your solution, getting this error Could not build the precompiled application for the device. Error (Xcode): Assertion failed: (fixups().size() == 2), function initFixup, file Atom.cpp, line 2021.

I'm also receive that error. In my cases I use next libriries

GoogleMLKit/Translate', '3.2.0'

GoogleMLKit/LanguageID', '3.2.0'

Someone known how to fix this issue?

@ADiks09 Have you tried deleting the pod file.lock and running the following commands:
flutter clean flutter pub get cd ios pod repo update
I have also done them

I tried with this but it throws the same error

MLKitBarcodeScanning.framework Assertion failed: (fixups().size() == 2), function initFixup, file Atom.cpp

@kekko7072 I tried out your solution, getting this error Could not build the precompiled application for the device. Error (Xcode): Assertion failed: (fixups().size() == 2), function initFixup, file Atom.cpp, line 2021.

For me it was mobile_scanner package for flutter, which used MLKitBarcodeScanning.framework
Heres the issue on the package: juliansteenbakker/mobile_scanner#690

The workaround mentioned here: juliansteenbakker/mobile_scanner#690 (comment) works

This workaround breaks other frameworks that my main project uses, but Ive verified it fixes this specific problem with a separate flutter project only dependent on mobile_scanner

@BradenBagby Using -ld64 (now updated to -ld-classic) does work because it forces a switch back to the old ld64 linker. However, the issue still persists with the new ld. Here's the explanation of -ld_classic from the man ld:

-ld_classic

Override the choice of linker, and force the use of ld-classic to link the binary. This is incompatible with options such as -merge*, used to build/merge libraries.

Complete solution for Capacitor Developers to add in ios/Podfile:

post_install do |installer|
  assertDeploymentTarget(installer)
  installer.pods_project.targets.each do |target|
    target.build_configurations.each do |config|
    xcconfig_path = config.base_configuration_reference.real_path
    xcconfig = File.read(xcconfig_path)
    xcconfig_mod = xcconfig.gsub(/DT_TOOLCHAIN_DIR/, "TOOLCHAIN_DIR")
    File.open(xcconfig_path, "w") { |file| file << xcconfig_mod }
    end
  end
end

Replace this with your PodFile on IOS dir.

post_install do |installer|
  installer.pods_project.targets.each do |target|
    flutter_additional_ios_build_settings(target)
    target.build_configurations.each do |config|
      config.build_settings['IPHONEOS_DEPLOYMENT_TARGET'] = '13.0'
      
      xcconfig_path = config.base_configuration_reference.real_path
      xcconfig = File.read(xcconfig_path)
      xcconfig_mod = xcconfig.gsub(/DT_TOOLCHAIN_DIR/, "TOOLCHAIN_DIR")
      File.open(xcconfig_path, "w") { |file| file << xcconfig_mod }
    end
  end
end

Assertion failed: (fixups().size() == 2)...

This issue has been fixed in Xcode 15-beta6.

@CrazyFanFan I have Xcode Beta 6 and the issue is still present with the same error, the solution provided by @ZhangTonghai worked for us

@CrazyFanFan I have Xcode Beta 6 and the issue is still present with the same error, the solution provided by @ZhangTonghai worked for us

@giannigdev I apologize for any confusion. In addition to the original question, there is a discussion about another issue related to the new ld error in Xcode 15. The "fix" refers to addressing the problem with LD.

As for the error with 'DT_TOOLCHAIN_DIR,' you can utilize some temporary workarounds mentioned above to bypass it.

It might be a good idea to start a new thread specifically dedicated to discussing the Xcode15(LD)'s problem.

This issue still present in Xcode 15 beta6.

`rkr@AY-LP-RKR iOS_App % pod install
Ignoring digest-crc-0.6.4 because its extensions are not built. Try: gem pristine digest-crc --version 0.6.4
Ignoring digest-crc-0.6.1 because its extensions are not built. Try: gem pristine digest-crc --version 0.6.1
Ignoring unf_ext-0.0.7.7 because its extensions are not built. Try: gem pristine unf_ext --version 0.0.7.7
Internal Build. Ignoring Release Branches specified in './Release.env'.

Analyzing dependencies
Downloading dependencies
Generating Pods project
[!] An error occurred while processing the post-install hook of the Podfile.

[!] Specifying multiple post_install hooks is unsupported.

/Library/Ruby/Gems/2.6.0/gems/cocoapods-core-1.12.1/lib/cocoapods-core/podfile/dsl.rb:974:in post_install' /Users/rkr/repos/iOS_App/Podfile:121:in block (2 levels) in from_ruby'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-core-1.12.1/lib/cocoapods-core/podfile.rb:196:in post_install!' /Library/Ruby/Gems/2.6.0/gems/cocoapods-1.12.1/lib/cocoapods/installer.rb:1013:in run_podfile_post_install_hook'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.12.1/lib/cocoapods/installer.rb:1001:in block in run_podfile_post_install_hooks' /Library/Ruby/Gems/2.6.0/gems/cocoapods-1.12.1/lib/cocoapods/user_interface.rb:149:in message'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.12.1/lib/cocoapods/installer.rb:1000:in run_podfile_post_install_hooks' /Library/Ruby/Gems/2.6.0/gems/cocoapods-1.12.1/lib/cocoapods/installer.rb:337:in block (2 levels) in create_and_save_projects'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.12.1/lib/cocoapods/installer/xcode/pods_project_generator/pods_project_writer.rb:61:in write!' /Library/Ruby/Gems/2.6.0/gems/cocoapods-1.12.1/lib/cocoapods/installer.rb:336:in block in create_and_save_projects'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.12.1/lib/cocoapods/user_interface.rb:64:in section' /Library/Ruby/Gems/2.6.0/gems/cocoapods-1.12.1/lib/cocoapods/installer.rb:315:in create_and_save_projects'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.12.1/lib/cocoapods/installer.rb:307:in generate_pods_project' /Library/Ruby/Gems/2.6.0/gems/cocoapods-1.12.1/lib/cocoapods/installer.rb:183:in integrate'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.12.1/lib/cocoapods/installer.rb:170:in install!' /Library/Ruby/Gems/2.6.0/gems/cocoapods-1.12.1/lib/cocoapods/command/install.rb:52:in run'
/Library/Ruby/Gems/2.6.0/gems/claide-1.1.0/lib/claide/command.rb:334:in run' /Library/Ruby/Gems/2.6.0/gems/cocoapods-1.12.1/lib/cocoapods/command.rb:52:in run'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.12.1/bin/pod:55:in <top (required)>' /usr/local/bin/pod:23:in load'
/usr/local/bin/pod:23:in <main>'

`

post_install do |installer|
      installer.pods_project.targets.each do |target|
          target.build_configurations.each do |config|
          xcconfig_path = config.base_configuration_reference.real_path
          xcconfig = File.read(xcconfig_path)
          xcconfig_mod = xcconfig.gsub(/DT_TOOLCHAIN_DIR/, "TOOLCHAIN_DIR")
          File.open(xcconfig_path, "w") { |file| file << xcconfig_mod }
          end
      end
  end

I fix this error with post install hook

the same issue happens on xcode 15 release version. this is the working solution. thank you very much @ZhangTonghai.

installer.pods_project.targets.each do |target|
target.build_configurations.each do |config|
xcconfig_path = config.base_configuration_reference.real_path
xcconfig = File.read(xcconfig_path)
xcconfig_mod = xcconfig.gsub(/DT_TOOLCHAIN_DIR/, "TOOLCHAIN_DIR")
File.open(xcconfig_path, "w") { |file| file << xcconfig_mod }
end
end

It worked for me. But have this error "Error (Xcode): SDK does not contain 'libarclite' at the path '/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/arc/libarclite_iphonesimulator.a'; try increasing the minimum deployment target"

Hi.

I see a lot of workarounds for a Podfile here. As a Pod author I want to ask if there is a workaround for the .podspec file, so developers who installs the pod don't not have this error?

I am using the following post install hook which also works on the newest Xcode

post_install do |installer|
  installer.aggregate_targets.each do |target|
    target.xcconfigs.each do |variant, xcconfig|
      xcconfig_path = target.client_root + target.xcconfig_relative_path(variant)
      IO.write(xcconfig_path, IO.read(xcconfig_path).gsub("DT_TOOLCHAIN_DIR", "TOOLCHAIN_DIR"))
    end
  end
  installer.pods_project.targets.each do |target|
    target.build_configurations.each do |config|
      if config.base_configuration_reference.is_a? Xcodeproj::Project::Object::PBXFileReference
        xcconfig_path = config.base_configuration_reference.real_path
        IO.write(xcconfig_path, IO.read(xcconfig_path).gsub("DT_TOOLCHAIN_DIR", "TOOLCHAIN_DIR"))
      end
    end
  end

@nekrich As a pod author you can add s.cocoapods_version = '>= 1.13.0' to your podspec to require clients to use at least 1.13.0 or get a failure at installation time.

Still facing this issue, anyone help

`Error (Xcode): type argument 'nw_proxy_config_t' (aka 'struct nw_proxy_config *') is neither an Objective-C object nor a block type
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator17.0.sdk/System/Library/Frameworks/WebKit.framework/Headers/WKWebsiteDataStore.h:119:46

Parse Issue (Xcode): Could not build module 'WebKit'
/Volumes/Samsung%20T7/@Coding/KB%20FoodNetwork/KB%20Food%20User/build/ios/Debug-iphonesimulator/flutter_inappwebview/flutter_inappwebview.framework/Headers/flutter_inappwebview-Swift.h:893:8

Parse Issue (Xcode): Could not build module 'WebKit'
/Volumes/Samsung%20T7/@Coding/KB%20FoodNetwork/KB%20Food%20User/build/ios/Debug-iphonesimulator/flutter_inappwebview/flutter_inappwebview.framework/Headers/flutter_inappwebview-Swift.h:285:8
`

@reysagar update flutter_inappwebview plugin to version 5.8.0

It's fixed now: pichillilorenzo/flutter_inappwebview#1790

@Afur version 5.8.0 didn't work for me either,
but I resolved this by adding the below code on the podfile,

Still thank you.

post_integrate do |installer|
  compiler_flags_key = 'COMPILER_FLAGS'
  project_path = 'Pods/Pods.xcodeproj'

  project = Xcodeproj::Project.open(project_path)
  project.targets.each do |target|
    target.build_phases.each do |build_phase|
      if build_phase.is_a?(Xcodeproj::Project::Object::PBXSourcesBuildPhase)
        build_phase.files.each do |file|
          if !file.settings.nil? && file.settings.key?(compiler_flags_key)
            compiler_flags = file.settings[compiler_flags_key]
            file.settings[compiler_flags_key] = compiler_flags.gsub(/-DOS_OBJECT_USE_OBJC=0\s*/, '')
          end
        end
      end
    end
  end
  project.save()
end

post_install do |installer|
  installer.pods_project.targets.each do |target|
    flutter_additional_ios_build_settings(target)
    target.build_configurations.each do |config|
      config.build_settings['IPHONEOS_DEPLOYMENT_TARGET'] = '13.0'
    end
  end
end

Flutter 3.13.1 • channel stable • https://github.com/flutter/flutter.git
Framework • revision e1e47221e8 (6 weeks ago) • 2023-08-22 21:43:18 -0700
Engine • revision b20183e040
Tools • Dart 3.1.0 • DevTools 2.25.0
Cocopods 1.13.0

I am using

post_install do |installer|
  installer.pods_project.targets.each do |target|
    flutter_additional_ios_build_settings(target)
    target.build_configurations.each do |config|
      xcconfig_path = config.base_configuration_reference.real_path
      xcconfig = File.read(xcconfig_path)
      xcconfig_mod = xcconfig.gsub(/DT_TOOLCHAIN_DIR/, "TOOLCHAIN_DIR")
      File.open(xcconfig_path, "w") { |file| file << xcconfig_mod }
    end
  end
end

and I got error again but my error is cuz of network image cache and update pubspec.yaml by this line

I am using

cached_network_image:
   git:
     url: https://github.com/gauravmehta13/flutter_cached_network_image.git
     path: cached_network_image

instead of

cached_network_image: ^3.2.3

and my app run perfectly

It helped to solve this problem. Thanks @ZhangTonghai

Thanks @ZhangTonghai.

`

post_install do |installer|
      installer.pods_project.targets.each do |target|
          target.build_configurations.each do |config|
          xcconfig_path = config.base_configuration_reference.real_path
          xcconfig = File.read(xcconfig_path)
          xcconfig_mod = xcconfig.gsub(/DT_TOOLCHAIN_DIR/, "TOOLCHAIN_DIR")
          File.open(xcconfig_path, "w") { |file| file << xcconfig_mod }
          end
      end
  end

I fix this error with post install hook

Thanks this worked! Saved me a crazy amount of time, no doubt.

Using CocoaPods 1.13 and XCode 15 this bug is still there as of Oct 2023.

`

post_install do |installer|
      installer.pods_project.targets.each do |target|
          target.build_configurations.each do |config|
          xcconfig_path = config.base_configuration_reference.real_path
          xcconfig = File.read(xcconfig_path)
          xcconfig_mod = xcconfig.gsub(/DT_TOOLCHAIN_DIR/, "TOOLCHAIN_DIR")
          File.open(xcconfig_path, "w") { |file| file << xcconfig_mod }
          end
      end
  end

I fix this error with post install hook

Thanks this worked! Saved me a crazy amount of time, no doubt.

Using CocoaPods 1.13 and XCode 15 this bug is still there as of Oct 2023.

Yeah issue is happening with 15.0.1, above post install worked.

I was facing same issue but I updated my Cocoapods to 1.14.3 and re-run pod install. My project compiles successfully without adding any post_install fix mentioned above.

I am using 'Sonoma' OS and Xcode 15.0.1.

I updated pod to 1.14.3, but the problem still occurs.

This is what I did and it's worked for me

Whenever you update the XCode, you need to update Cocoapods

brew upgrade cocoapods

clean the the installed packages using the command “flutter clean” and install again saving pubspec.yaml file. then on the project folder redirect to the ios folder and install pods again

pod install

That's it.

My Xcode version:
Version 15.0.1 (15A507)

`

post_install do |installer|
      installer.pods_project.targets.each do |target|
          target.build_configurations.each do |config|
          xcconfig_path = config.base_configuration_reference.real_path
          xcconfig = File.read(xcconfig_path)
          xcconfig_mod = xcconfig.gsub(/DT_TOOLCHAIN_DIR/, "TOOLCHAIN_DIR")
          File.open(xcconfig_path, "w") { |file| file << xcconfig_mod }
          end
      end
  end

I fix this error with post install hook

is work for me