Tests doesn't build due to Firebase linking error

[geolhv]

Description

When running the main app test target with firebaseanalytics added in a swift package we get the following error.

Undefined symbols for architecture arm64:
  "_OBJC_CLASS_$_GULAppDelegateSwizzler", referenced from:
       in GoogleAppMeasurement[arm64][7](APMAnalytics.o)
  "_OBJC_CLASS_$_GULMutableDictionary", referenced from:
       in GoogleAppMeasurement[arm64][35](APMEExperiment.o)
  "_OBJC_CLASS_$_GULNetwork", referenced from:
       in GoogleAppMeasurement[arm64][7](APMAnalytics.o)
  "_OBJC_CLASS_$_GULSwizzler", referenced from:
       in GoogleAppMeasurement[arm64][335](UIViewController+APMScreenClassName.o)
  "_kGULNetworkHTTPStatusCodeCannotAcceptTraffic", referenced from:
      -[APMETaskManager handleFetchingExperimentsResponse:data:error:] in GoogleAppMeasurement[arm64][42](APMETaskManager.o)
      -[APMMeasurement networkUploadCompletionHandlerWithResponse:error:] in GoogleAppMeasurement[arm64][62](APMMeasurement.o)
      -[APMMeasurement networkRemoteConfigFetchCompletionHandler:data:error:] in GoogleAppMeasurement[arm64][62](APMMeasurement.o)
  "_kGULNetworkHTTPStatusCodeNotFound", referenced from:
      -[APMMeasurement networkRemoteConfigFetchCompletionHandler:data:error:] in GoogleAppMeasurement[arm64][62](APMMeasurement.o)
  "_kGULNetworkHTTPStatusCodeNotModified", referenced from:
      ___37-[APMMeasurement retrievePSMResponse]_block_invoke in GoogleAppMeasurement[arm64][62](APMMeasurement.o)
      -[APMMeasurement networkRemoteConfigFetchCompletionHandler:data:error:] in GoogleAppMeasurement[arm64][62](APMMeasurement.o)
      -[APMMeasurement(SKAN) handleSKANFetchResponse:data:error:] in GoogleAppMeasurement[arm64][67](APMMeasurement+SKAN.o)
      ___46-[APMMeasurement(URL) requestDeferredDeepLink]_block_invoke in GoogleAppMeasurement[arm64][68](APMMeasurement+URL.o)
  "_kGULNetworkHTTPStatusCodeUnavailable", referenced from:
      -[APMETaskManager handleFetchingExperimentsResponse:data:error:] in GoogleAppMeasurement[arm64][42](APMETaskManager.o)
      -[APMMeasurement networkUploadCompletionHandlerWithResponse:error:] in GoogleAppMeasurement[arm64][62](APMMeasurement.o)
      -[APMMeasurement networkRemoteConfigFetchCompletionHandler:data:error:] in GoogleAppMeasurement[arm64][62](APMMeasurement.o)
  "_kGULNetworkHTTPStatusNoContent", referenced from:
      -[APMETaskManager handleFetchingExperimentsResponse:data:error:] in GoogleAppMeasurement[arm64][42](APMETaskManager.o)
      -[APMMeasurement networkUploadCompletionHandlerWithResponse:error:] in GoogleAppMeasurement[arm64][62](APMMeasurement.o)
      ___37-[APMMeasurement retrievePSMResponse]_block_invoke in GoogleAppMeasurement[arm64][62](APMMeasurement.o)
      -[APMMeasurement networkRemoteConfigFetchCompletionHandler:data:error:] in GoogleAppMeasurement[arm64][62](APMMeasurement.o)
      ___46-[APMMeasurement(URL) requestDeferredDeepLink]_block_invoke in GoogleAppMeasurement[arm64][68](APMMeasurement+URL.o)
  "_kGULNetworkHTTPStatusOK", referenced from:
      -[APMETaskManager handleFetchingExperimentsResponse:data:error:] in GoogleAppMeasurement[arm64][42](APMETaskManager.o)
      -[APMMeasurement networkUploadCompletionHandlerWithResponse:error:] in GoogleAppMeasurement[arm64][62](APMMeasurement.o)
      ___37-[APMMeasurement retrievePSMResponse]_block_invoke in GoogleAppMeasurement[arm64][62](APMMeasurement.o)
      -[APMMeasurement networkRemoteConfigFetchCompletionHandler:data:error:] in GoogleAppMeasurement[arm64][62](APMMeasurement.o)
      -[APMMeasurement(SKAN) handleSKANFetchResponse:data:error:] in GoogleAppMeasurement[arm64][67](APMMeasurement+SKAN.o)
      ___46-[APMMeasurement(URL) requestDeferredDeepLink]_block_invoke in GoogleAppMeasurement[arm64][68](APMMeasurement+URL.o)
  "_pb_decode", referenced from:
      _apmpb_decode_ad_campaign_info in GoogleAppMeasurement[arm64][79](apmpb_ad_campaign_info_decoder.o)
      _apmpb_decode_app_property in GoogleAppMeasurement[arm64][82](apmpb_app_property_decoder.o)
      _apmpb_decode_audience in GoogleAppMeasurement[arm64][85](apmpb_audience_decoder.o)
      _apmpb_decode_audience in GoogleAppMeasurement[arm64][85](apmpb_audience_decoder.o)
      _apmpb_decode_audience_leaf_filter_result in GoogleAppMeasurement[arm64][88](apmpb_audience_leaf_filter_result_decoder.o)
      _apmpb_decode_audience_leaf_filter_result in GoogleAppMeasurement[arm64][88](apmpb_audience_leaf_filter_result_decoder.o)
      _apmpb_decode_client_property in GoogleAppMeasurement[arm64][91](apmpb_client_property_decoder.o)
      _apmpb_decode_client_property in GoogleAppMeasurement[arm64][91](apmpb_client_property_decoder.o)
      ...
  "_pb_decode_varint", referenced from:
      _nano_decode_repeated_uint64 in GoogleAppMeasurement[arm64][320](decoder_common.o)
  "_pb_encode", referenced from:
      _nano_two_pass_encoding in GoogleAppMeasurement[arm64][321](encoder_common.o)
      _nano_two_pass_encoding in GoogleAppMeasurement[arm64][321](encoder_common.o)
  "_pb_encode_string", referenced from:
      _nano_encode_string in GoogleAppMeasurement[arm64][321](encoder_common.o)
  "_pb_encode_submessage", referenced from:
      _apmpb_encode_repeated_ad_campaign_info in GoogleAppMeasurement[arm64][80](apmpb_ad_campaign_info_encoder.o)
      _apmpb_encode_repeated_app_property in GoogleAppMeasurement[arm64][83](apmpb_app_property_encoder.o)
      _apmpb_encode_repeated_audience in GoogleAppMeasurement[arm64][86](apmpb_audience_encoder.o)
      _apmpb_encode_repeated_audience_leaf_filter_result in GoogleAppMeasurement[arm64][89](apmpb_audience_leaf_filter_result_encoder.o)
      _apmpb_encode_repeated_client_property in GoogleAppMeasurement[arm64][92](apmpb_client_property_encoder.o)
      _apmpb_encode_repeated_consent_config in GoogleAppMeasurement[arm64][95](apmpb_consent_config_encoder.o)
      _apmpb_encode_repeated_consent_default_entry in GoogleAppMeasurement[arm64][98](apmpb_consent_default_entry_encoder.o)
      ...
  "_pb_encode_tag_for_field", referenced from:
      _apmpb_encode_repeated_ad_campaign_info in GoogleAppMeasurement[arm64][80](apmpb_ad_campaign_info_encoder.o)
      _apmpb_encode_repeated_app_property in GoogleAppMeasurement[arm64][83](apmpb_app_property_encoder.o)
      _apmpb_encode_repeated_audience in GoogleAppMeasurement[arm64][86](apmpb_audience_encoder.o)
      _apmpb_encode_repeated_audience_leaf_filter_result in GoogleAppMeasurement[arm64][89](apmpb_audience_leaf_filter_result_encoder.o)
      _apmpb_encode_repeated_client_property in GoogleAppMeasurement[arm64][92](apmpb_client_property_encoder.o)
      _apmpb_encode_repeated_consent_config in GoogleAppMeasurement[arm64][95](apmpb_consent_config_encoder.o)
      _apmpb_encode_repeated_consent_default_entry in GoogleAppMeasurement[arm64][98](apmpb_consent_default_entry_encoder.o)
      ...
  "_pb_encode_varint", referenced from:
      _nano_encode_repeated_uint64 in GoogleAppMeasurement[arm64][321](encoder_common.o)
  "_pb_istream_from_buffer", referenced from:
      _apmpb_decode_ad_campaign_info in GoogleAppMeasurement[arm64][79](apmpb_ad_campaign_info_decoder.o)
      _apmpb_decode_app_property in GoogleAppMeasurement[arm64][82](apmpb_app_property_decoder.o)
      _apmpb_decode_audience in GoogleAppMeasurement[arm64][85](apmpb_audience_decoder.o)
      _apmpb_decode_audience in GoogleAppMeasurement[arm64][85](apmpb_audience_decoder.o)
      _apmpb_decode_audience_leaf_filter_result in GoogleAppMeasurement[arm64][88](apmpb_audience_leaf_filter_result_decoder.o)
      _apmpb_decode_audience_leaf_filter_result in GoogleAppMeasurement[arm64][88](apmpb_audience_leaf_filter_result_decoder.o)
      _apmpb_decode_client_property in GoogleAppMeasurement[arm64][91](apmpb_client_property_decoder.o)
      _apmpb_decode_client_property in GoogleAppMeasurement[arm64][91](apmpb_client_property_decoder.o)
      ...
  "_pb_ostream_from_buffer", referenced from:
      _nano_two_pass_encoding in GoogleAppMeasurement[arm64][321](encoder_common.o)
  "_pb_read", referenced from:
      _apmpb_decode_repeated_ad_campaign_info in GoogleAppMeasurement[arm64][79](apmpb_ad_campaign_info_decoder.o)
      _apmpb_decode_repeated_ad_campaign_info in GoogleAppMeasurement[arm64][79](apmpb_ad_campaign_info_decoder.o)
      _apmpb_decode_repeated_app_property in GoogleAppMeasurement[arm64][82](apmpb_app_property_decoder.o)
      _apmpb_decode_repeated_app_property in GoogleAppMeasurement[arm64][82](apmpb_app_property_decoder.o)
      _apmpb_decode_repeated_audience in GoogleAppMeasurement[arm64][85](apmpb_audience_decoder.o)
      _apmpb_decode_repeated_audience in GoogleAppMeasurement[arm64][85](apmpb_audience_decoder.o)
      _apmpb_decode_repeated_audience_leaf_filter_result in GoogleAppMeasurement[arm64][88](apmpb_audience_leaf_filter_result_decoder.o)
      _apmpb_decode_repeated_audience_leaf_filter_result in GoogleAppMeasurement[arm64][88](apmpb_audience_leaf_filter_result_decoder.o)
      ...
ld: symbol(s) not found for architecture arm64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

Reproducing the issue

In an Xcode project:

• Create multiple packages (Package1, Package2)
• Make one of packages use firebase analytics which means adding firebase as a dependency
• Add all packages in the main app target
• Add a test target to the main app
• Add a test-plan to the main app scheme that then runs the test target

Firebase SDK Version

11.8.1

Xcode Version

16.2

Installation Method

Swift Package Manager

Firebase Product(s)

Analytics

Targeted Platforms

iOS

Relevant Log Output

/Users/georgequentin/Desktop/Screenshot 2025-03-13 at 22.17.21.png

Undefined symbols for architecture arm64:
  "_OBJC_CLASS_$_GULAppDelegateSwizzler", referenced from:
       in GoogleAppMeasurement[arm64][7](APMAnalytics.o)
  "_OBJC_CLASS_$_GULMutableDictionary", referenced from:
       in GoogleAppMeasurement[arm64][35](APMEExperiment.o)
  "_OBJC_CLASS_$_GULNetwork", referenced from:
       in GoogleAppMeasurement[arm64][7](APMAnalytics.o)
  "_OBJC_CLASS_$_GULSwizzler", referenced from:
       in GoogleAppMeasurement[arm64][335](UIViewController+APMScreenClassName.o)
  "_kGULNetworkHTTPStatusCodeCannotAcceptTraffic", referenced from:
      -[APMETaskManager handleFetchingExperimentsResponse:data:error:] in GoogleAppMeasurement[arm64][42](APMETaskManager.o)
      -[APMMeasurement networkUploadCompletionHandlerWithResponse:error:] in GoogleAppMeasurement[arm64][62](APMMeasurement.o)
      -[APMMeasurement networkRemoteConfigFetchCompletionHandler:data:error:] in GoogleAppMeasurement[arm64][62](APMMeasurement.o)
  "_kGULNetworkHTTPStatusCodeNotFound", referenced from:
      -[APMMeasurement networkRemoteConfigFetchCompletionHandler:data:error:] in GoogleAppMeasurement[arm64][62](APMMeasurement.o)
  "_kGULNetworkHTTPStatusCodeNotModified", referenced from:
      ___37-[APMMeasurement retrievePSMResponse]_block_invoke in GoogleAppMeasurement[arm64][62](APMMeasurement.o)
      -[APMMeasurement networkRemoteConfigFetchCompletionHandler:data:error:] in GoogleAppMeasurement[arm64][62](APMMeasurement.o)
      -[APMMeasurement(SKAN) handleSKANFetchResponse:data:error:] in GoogleAppMeasurement[arm64][67](APMMeasurement+SKAN.o)
      ___46-[APMMeasurement(URL) requestDeferredDeepLink]_block_invoke in GoogleAppMeasurement[arm64][68](APMMeasurement+URL.o)
  "_kGULNetworkHTTPStatusCodeUnavailable", referenced from:
      -[APMETaskManager handleFetchingExperimentsResponse:data:error:] in GoogleAppMeasurement[arm64][42](APMETaskManager.o)
      -[APMMeasurement networkUploadCompletionHandlerWithResponse:error:] in GoogleAppMeasurement[arm64][62](APMMeasurement.o)
      -[APMMeasurement networkRemoteConfigFetchCompletionHandler:data:error:] in GoogleAppMeasurement[arm64][62](APMMeasurement.o)
  "_kGULNetworkHTTPStatusNoContent", referenced from:
      -[APMETaskManager handleFetchingExperimentsResponse:data:error:] in GoogleAppMeasurement[arm64][42](APMETaskManager.o)
      -[APMMeasurement networkUploadCompletionHandlerWithResponse:error:] in GoogleAppMeasurement[arm64][62](APMMeasurement.o)
      ___37-[APMMeasurement retrievePSMResponse]_block_invoke in GoogleAppMeasurement[arm64][62](APMMeasurement.o)
      -[APMMeasurement networkRemoteConfigFetchCompletionHandler:data:error:] in GoogleAppMeasurement[arm64][62](APMMeasurement.o)
      ___46-[APMMeasurement(URL) requestDeferredDeepLink]_block_invoke in GoogleAppMeasurement[arm64][68](APMMeasurement+URL.o)
  "_kGULNetworkHTTPStatusOK", referenced from:
      -[APMETaskManager handleFetchingExperimentsResponse:data:error:] in GoogleAppMeasurement[arm64][42](APMETaskManager.o)
      -[APMMeasurement networkUploadCompletionHandlerWithResponse:error:] in GoogleAppMeasurement[arm64][62](APMMeasurement.o)
      ___37-[APMMeasurement retrievePSMResponse]_block_invoke in GoogleAppMeasurement[arm64][62](APMMeasurement.o)
      -[APMMeasurement networkRemoteConfigFetchCompletionHandler:data:error:] in GoogleAppMeasurement[arm64][62](APMMeasurement.o)
      -[APMMeasurement(SKAN) handleSKANFetchResponse:data:error:] in GoogleAppMeasurement[arm64][67](APMMeasurement+SKAN.o)
      ___46-[APMMeasurement(URL) requestDeferredDeepLink]_block_invoke in GoogleAppMeasurement[arm64][68](APMMeasurement+URL.o)
  "_pb_decode", referenced from:
      _apmpb_decode_ad_campaign_info in GoogleAppMeasurement[arm64][79](apmpb_ad_campaign_info_decoder.o)
      _apmpb_decode_app_property in GoogleAppMeasurement[arm64][82](apmpb_app_property_decoder.o)
      _apmpb_decode_audience in GoogleAppMeasurement[arm64][85](apmpb_audience_decoder.o)
      _apmpb_decode_audience in GoogleAppMeasurement[arm64][85](apmpb_audience_decoder.o)
      _apmpb_decode_audience_leaf_filter_result in GoogleAppMeasurement[arm64][88](apmpb_audience_leaf_filter_result_decoder.o)
      _apmpb_decode_audience_leaf_filter_result in GoogleAppMeasurement[arm64][88](apmpb_audience_leaf_filter_result_decoder.o)
      _apmpb_decode_client_property in GoogleAppMeasurement[arm64][91](apmpb_client_property_decoder.o)
      _apmpb_decode_client_property in GoogleAppMeasurement[arm64][91](apmpb_client_property_decoder.o)
      ...
  "_pb_decode_varint", referenced from:
      _nano_decode_repeated_uint64 in GoogleAppMeasurement[arm64][320](decoder_common.o)
  "_pb_encode", referenced from:
      _nano_two_pass_encoding in GoogleAppMeasurement[arm64][321](encoder_common.o)
      _nano_two_pass_encoding in GoogleAppMeasurement[arm64][321](encoder_common.o)
  "_pb_encode_string", referenced from:
      _nano_encode_string in GoogleAppMeasurement[arm64][321](encoder_common.o)
  "_pb_encode_submessage", referenced from:
      _apmpb_encode_repeated_ad_campaign_info in GoogleAppMeasurement[arm64][80](apmpb_ad_campaign_info_encoder.o)
      _apmpb_encode_repeated_app_property in GoogleAppMeasurement[arm64][83](apmpb_app_property_encoder.o)
      _apmpb_encode_repeated_audience in GoogleAppMeasurement[arm64][86](apmpb_audience_encoder.o)
      _apmpb_encode_repeated_audience_leaf_filter_result in GoogleAppMeasurement[arm64][89](apmpb_audience_leaf_filter_result_encoder.o)
      _apmpb_encode_repeated_client_property in GoogleAppMeasurement[arm64][92](apmpb_client_property_encoder.o)
      _apmpb_encode_repeated_consent_config in GoogleAppMeasurement[arm64][95](apmpb_consent_config_encoder.o)
      _apmpb_encode_repeated_consent_default_entry in GoogleAppMeasurement[arm64][98](apmpb_consent_default_entry_encoder.o)
      ...
  "_pb_encode_tag_for_field", referenced from:
      _apmpb_encode_repeated_ad_campaign_info in GoogleAppMeasurement[arm64][80](apmpb_ad_campaign_info_encoder.o)
      _apmpb_encode_repeated_app_property in GoogleAppMeasurement[arm64][83](apmpb_app_property_encoder.o)
      _apmpb_encode_repeated_audience in GoogleAppMeasurement[arm64][86](apmpb_audience_encoder.o)
      _apmpb_encode_repeated_audience_leaf_filter_result in GoogleAppMeasurement[arm64][89](apmpb_audience_leaf_filter_result_encoder.o)
      _apmpb_encode_repeated_client_property in GoogleAppMeasurement[arm64][92](apmpb_client_property_encoder.o)
      _apmpb_encode_repeated_consent_config in GoogleAppMeasurement[arm64][95](apmpb_consent_config_encoder.o)
      _apmpb_encode_repeated_consent_default_entry in GoogleAppMeasurement[arm64][98](apmpb_consent_default_entry_encoder.o)
      ...
  "_pb_encode_varint", referenced from:
      _nano_encode_repeated_uint64 in GoogleAppMeasurement[arm64][321](encoder_common.o)
  "_pb_istream_from_buffer", referenced from:
      _apmpb_decode_ad_campaign_info in GoogleAppMeasurement[arm64][79](apmpb_ad_campaign_info_decoder.o)
      _apmpb_decode_app_property in GoogleAppMeasurement[arm64][82](apmpb_app_property_decoder.o)
      _apmpb_decode_audience in GoogleAppMeasurement[arm64][85](apmpb_audience_decoder.o)
      _apmpb_decode_audience in GoogleAppMeasurement[arm64][85](apmpb_audience_decoder.o)
      _apmpb_decode_audience_leaf_filter_result in GoogleAppMeasurement[arm64][88](apmpb_audience_leaf_filter_result_decoder.o)
      _apmpb_decode_audience_leaf_filter_result in GoogleAppMeasurement[arm64][88](apmpb_audience_leaf_filter_result_decoder.o)
      _apmpb_decode_client_property in GoogleAppMeasurement[arm64][91](apmpb_client_property_decoder.o)
      _apmpb_decode_client_property in GoogleAppMeasurement[arm64][91](apmpb_client_property_decoder.o)
      ...
  "_pb_ostream_from_buffer", referenced from:
      _nano_two_pass_encoding in GoogleAppMeasurement[arm64][321](encoder_common.o)
  "_pb_read", referenced from:
      _apmpb_decode_repeated_ad_campaign_info in GoogleAppMeasurement[arm64][79](apmpb_ad_campaign_info_decoder.o)
      _apmpb_decode_repeated_ad_campaign_info in GoogleAppMeasurement[arm64][79](apmpb_ad_campaign_info_decoder.o)
      _apmpb_decode_repeated_app_property in GoogleAppMeasurement[arm64][82](apmpb_app_property_decoder.o)
      _apmpb_decode_repeated_app_property in GoogleAppMeasurement[arm64][82](apmpb_app_property_decoder.o)
      _apmpb_decode_repeated_audience in GoogleAppMeasurement[arm64][85](apmpb_audience_decoder.o)
      _apmpb_decode_repeated_audience in GoogleAppMeasurement[arm64][85](apmpb_audience_decoder.o)
      _apmpb_decode_repeated_audience_leaf_filter_result in GoogleAppMeasurement[arm64][88](apmpb_audience_leaf_filter_result_decoder.o)
      _apmpb_decode_repeated_audience_leaf_filter_result in GoogleAppMeasurement[arm64][88](apmpb_audience_leaf_filter_result_decoder.o)
      ...
ld: symbol(s) not found for architecture arm64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

If using Swift Package Manager, the project's Package.resolved

Expand Package.resolved snippet

Replace this line with the contents of your Package.resolved.

If using CocoaPods, the project's Podfile.lock

Expand Podfile.lock snippet

Replace this line with the contents of your Podfile.lock!

[google-oss-bot]

I couldn't figure out how to label this issue, so I've labeled it for a human to triage. Hang tight.

[paulb777]

This could be a problem related to mixing CocoaPods and SPM or some other build configuration issue.

We'll likely need a reproducible example to help.

[geolhv]

This could be a problem related to mixing CocoaPods and SPM or some other build configuration issue.

We'll likely need a reproducible example to help.

Our project doesn't use CocoaPods, all our external dependencies are linked through SPM

[google-oss-bot]

Hey @geolhv. We need more information to resolve this issue but there hasn't been an update in 5 weekdays. I'm marking the issue as stale and if there are no new updates in the next 5 days I will close it automatically.

If you have more information that will help us get to the bottom of this, just add a comment!