From d47474823b5a8abdc2d9cee798b3437c250bb207 Mon Sep 17 00:00:00 2001
From: AustinBenoit <austinbenoit@google.com>
Date: Thu, 9 Apr 2026 09:32:47 -0400
Subject: [PATCH 1/9] StoreKit2 support for Apple devices

---
 CMakeLists.txt                                |   6 +
 analytics/CMakeLists.txt                      |  76 ++++++++++-
 analytics/integration_test/readme.md          |  31 +++++
 .../integration_test/src/integration_test.cc  |  19 +++
 analytics/src/analytics_android.cc            |  24 ++++
 analytics/src/analytics_common.h              |   5 +-
 analytics/src/analytics_desktop.cc            |  24 ++++
 analytics/src/analytics_ios.mm                |  54 +++++++-
 analytics/src/include/firebase/analytics.h    |  31 +++++
 analytics/src/ios/swift/StoreKit2Bridge.swift |  37 ++++++
 app/CMakeLists.txt                            | 125 ++++++++----------
 release_build_files/readme.md                 |   1 +
 scripts/gha/build_ios_tvos.py                 |  43 ++++--
 test_mac_ios_simulator.sh                     |   7 +-
 14 files changed, 387 insertions(+), 96 deletions(-)
 create mode 100644 analytics/src/ios/swift/StoreKit2Bridge.swift
 mode change 100644 => 100755 test_mac_ios_simulator.sh

diff --git a/CMakeLists.txt b/CMakeLists.txt
index c1bbe08a9b..f956830507 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -96,8 +96,14 @@ set(FIREBASE_XCODE_TARGET_FORMAT "frameworks" CACHE STRING
 set(FIREBASE_CPP_SDK_ROOT_DIR ${CMAKE_CURRENT_LIST_DIR})
 
 project (firebase NONE)
+
+set(CMAKE_Swift_LANGUAGE_VERSION 5.9)
+
 enable_language(C)
 enable_language(CXX)
+if (IOS)
+  enable_language(Swift)
+endif()
 
 if(NOT DEFINED CMAKE_CXX_COMPILER_LAUNCHER)
   find_program(CCACHE_PROGRAM ccache)
diff --git a/analytics/CMakeLists.txt b/analytics/CMakeLists.txt
index 63d33b125f..b40b6c78d0 100644
--- a/analytics/CMakeLists.txt
+++ b/analytics/CMakeLists.txt
@@ -72,7 +72,8 @@ set(android_SRCS
 
 # Source files used by the iOS implementation.
 set(ios_SRCS
-    src/analytics_ios.mm)
+    src/analytics_ios.mm
+    src/ios/swift/StoreKit2Bridge.swift)
 
 # Source files used by the desktop / stub implementation.
 set(desktop_SRCS
@@ -88,8 +89,12 @@ if(ANDROID)
   set(analytics_platform_SRCS
       "${android_SRCS}")
 elseif(IOS)
+  if(CMAKE_GENERATOR STREQUAL "Unix Makefiles")
+    message(FATAL_ERROR "Swift is not supported by the 'Unix Makefiles' generator on iOS. Please use the Xcode generator (-G Xcode) or Ninja (-G Ninja).")
+  endif()
   set(analytics_platform_SRCS
       "${ios_SRCS}")
+  
 else()
   set(analytics_platform_SRCS
       "${desktop_SRCS}")
@@ -99,6 +104,9 @@ add_library(firebase_analytics STATIC
     ${common_SRCS}
     ${analytics_platform_SRCS})
 
+
+add_dependencies(firebase_analytics FIREBASE_ANALYTICS_GENERATED_HEADERS)
+
 set_property(TARGET firebase_analytics PROPERTY FOLDER "Firebase Cpp")
 
 # Set up the dependency on Firebase App.
@@ -123,19 +131,73 @@ target_compile_definitions(firebase_analytics
 )
 # Automatically include headers that might not be declared.
 if(MSVC)
-  add_definitions(/FI"assert.h" /FI"string.h" /FI"stdint.h")
+  target_compile_options(firebase_analytics PRIVATE
+    $<$<NOT:$<COMPILE_LANGUAGE:Swift>>:/FI"assert.h">
+    $<$<NOT:$<COMPILE_LANGUAGE:Swift>>:/FI"string.h">
+    $<$<NOT:$<COMPILE_LANGUAGE:Swift>>:/FI"stdint.h">)
 else()
-  add_definitions(-include assert.h -include string.h)
+  target_compile_options(firebase_analytics PRIVATE
+    $<$<NOT:$<COMPILE_LANGUAGE:Swift>>:SHELL:-include assert.h -include string.h>
+  )
 endif()
 
 if(ANDROID)
   firebase_cpp_proguard_file(analytics)
 elseif(IOS)
-  # Enable Automatic Reference Counting (ARC) and Bitcode.
+  # Enable Automatic Reference Counting (ARC) and Bitcode specifically for Objective-C++ files.
+  # Note: -fembed-bitcode is placed here for src/analytics_ios.mm so that it is not passed
+  # to the Swift compiler, which does not support the flag.
+  set_source_files_properties(src/analytics_ios.mm PROPERTIES COMPILE_OPTIONS "-fobjc-arc;-fembed-bitcode")
+
+  target_include_directories(firebase_analytics
+    PRIVATE
+      "$(DERIVED_FILE_DIR)"
+  )
+ 
+if(IOS OR TVOS)
+  # Swift needs to find the FirebaseAnalytics module from CocoaPods
+  set(pods_dir "${FIREBASE_POD_DIR}/Pods")
+  
+  # Point to the base directories containing the .xcframework folders.
+  # Xcode natively handles XCFrameworks and will pick the right slice automatically.
+  # Determine the xcframework architecture slice based on the target platform
+  # and if it is running on simulator or device.
+  if(IOS)
+    string(TOLOWER "${CMAKE_OSX_SYSROOT}" sysroot_lower)
+    if(sysroot_lower MATCHES "simulator")
+      set(analytics_slice "ios-arm64_x86_64-simulator")
+    else()
+      set(analytics_slice "ios-arm64")
+    endif()
+  elseif(TVOS)
+    string(TOLOWER "${CMAKE_OSX_SYSROOT}" sysroot_lower)
+    if(sysroot_lower MATCHES "simulator")
+      set(analytics_slice "tvos-arm64_x86_64-simulator")
+    else()
+      set(analytics_slice "tvos-arm64")
+    endif()
+  endif()
+
+  set(analytics_framework_dir "${pods_dir}/FirebaseAnalytics/Frameworks/FirebaseAnalytics.xcframework/${analytics_slice}")
+  set(measurement_framework_dir "${pods_dir}/GoogleAppMeasurement/Frameworks/GoogleAppMeasurement.xcframework/${analytics_slice}")
+  
   target_compile_options(firebase_analytics
-                         PUBLIC "-fobjc-arc" "-fembed-bitcode")
-  target_link_libraries(firebase_analytics
-                        PUBLIC "-fembed-bitcode")
+    PRIVATE
+      $<$<COMPILE_LANGUAGE:Swift>:-F${analytics_framework_dir}>
+      $<$<COMPILE_LANGUAGE:Swift>:-F${measurement_framework_dir}>
+  )
+  
+  target_link_options(firebase_analytics
+    PUBLIC
+      "-F${analytics_framework_dir}"
+      "-F${measurement_framework_dir}"
+  )
+  
+  # Prevent Xcode from trying to build or evaluate headers for unused architectures
+  set_target_properties(firebase_analytics PROPERTIES
+    XCODE_ATTRIBUTE_ONLY_ACTIVE_ARCH "YES"
+  )
+endif()
 
   setup_pod_headers(
     firebase_analytics
diff --git a/analytics/integration_test/readme.md b/analytics/integration_test/readme.md
index 18599e5952..7aac97e26a 100644
--- a/analytics/integration_test/readme.md
+++ b/analytics/integration_test/readme.md
@@ -64,6 +64,37 @@ Building and Running the sample
     "Analytics" tab accessible from
     [https://firebase.google.com/console/](https://firebase.google.com/console/).
 
+#### iOS Testing LogAppleTransaction
+
+To test the log apple transaction function, you should use the existing test app and xcode's simulated transactions.
+The manual test will involve running the integration test: `firebase_analytics_test/TestLogAppleTransaction` and verifying that it logs a transaction to the console.
+
+  - Step 1: Set up the Local Xcode Environment
+    - In Xcode, go to File > New > File from Template and create a StoreKit Configuration File (.storekit).
+      - Give the configuration any name.
+      - Target both integration_test and integration_test_tvos
+    - Add at least one dummy product to this file. 
+      - Do this by selecting the file in xcode and clicking the + button in the bottom left corner.
+      - Choose a Non-Consumable in app purchase product. 
+      - Give it a Reference name of your choice (e.g. "ReferenceAppleIapProduct").
+      - Give it a Product ID of your choice (e.g. "com.example.nonconsumable").
+    - Make the app use the store kit file. In the top bar go to Product > Scheme > Edit Scheme... >
+      - In the left hand menu select Run
+      - Select the Options tab on the right
+      - Set the StoreKit Configuration dropdown to your new .storekit file.
+  - Step 2: Validate logging transactions
+    - Try running the test app with the dummy transaction ID. It should return an error from the
+      LogAppleTransactions function.
+    - After runnign the app once you can create a simulated transaction for testing.
+    - To create a simulated transaction ID:
+        - Go to Debug > StoreKit > Manage Transactions.
+        - Click the + button in the bottom left corner.
+        - Select the Non-Consumable in app purchase product.
+        - Copy the transaction ID to the test case and replace 'dummy_transaction_id' with your new transaction ID. e.g. '0'
+        - Make sure to update the testcase to now expect success. 
+    - Then try running the test app again with the simulated transaction ID.
+      - It should log the transaction to the console. Both the Xcode console and firebase console should show a log for an in app purchase. 
+
 ### Android
   - Register your Android app with Firebase.
     - Create a new app on the [Firebase console](https://firebase.google.com/console/), and attach
diff --git a/analytics/integration_test/src/integration_test.cc b/analytics/integration_test/src/integration_test.cc
index 54016135d9..462b9b5912 100644
--- a/analytics/integration_test/src/integration_test.cc
+++ b/analytics/integration_test/src/integration_test.cc
@@ -22,6 +22,10 @@
 #include <ctime>
 #include <future>
 
+#if defined(__APPLE__)
+#include <TargetConditionals.h>
+#endif
+
 #include "app_framework.h"  // NOLINT
 #include "firebase/analytics.h"
 #include "firebase/analytics/event_names.h"
@@ -299,6 +303,21 @@ TEST_F(FirebaseAnalyticsTest, TestDesktopDebugMode) {
   firebase::analytics::SetDesktopDebugMode(false);
 }
 
+TEST_F(FirebaseAnalyticsTest, TestLogAppleTransaction) {
+  auto future =
+      firebase::analytics::LogAppleTransaction("dummy_transaction_id");
+  WaitForCompletionAnyResult(future, "LogAppleTransaction");
+#if defined(__APPLE__) && (TARGET_OS_IOS || TARGET_OS_TV)
+  // On iOS/tvOS, passing a dummy transaction ID will fail to find a verified
+  // transaction.
+  EXPECT_NE(future.error(), 0);
+#else
+  // On Android and Desktop (including macOS), LogAppleTransaction is a no-op
+  // that returns success.
+  EXPECT_EQ(future.error(), 0);
+#endif
+}
+
 TEST_F(FirebaseAnalyticsTest, TestLogEvents) {
   // Log an event with no parameters.
   firebase::analytics::LogEvent(firebase::analytics::kEventLogin);
diff --git a/analytics/src/analytics_android.cc b/analytics/src/analytics_android.cc
index fe1ba4235a..9d097a847c 100644
--- a/analytics/src/analytics_android.cc
+++ b/analytics/src/analytics_android.cc
@@ -502,6 +502,30 @@ void LogEvent(const char* name) {
   LogEvent(name, nullptr, static_cast<size_t>(0));
 }
 
+/// Log an Apple StoreKit 2 transaction. This is a no-op on Android and returns
+/// success.
+Future<void> LogAppleTransaction(const char* transaction_id) {
+  auto* api = internal::FutureData::Get() ? internal::FutureData::Get()->api()
+                                          : nullptr;
+  if (!api) {
+    return Future<void>();
+  }
+  const auto future_handle =
+      api->SafeAlloc<void>(internal::kAnalyticsFnLogAppleTransaction);
+  api->Complete(future_handle, 0, "");
+  return Future<void>(api, future_handle.get());
+}
+
+Future<void> LogAppleTransactionLastResult() {
+  auto* api = internal::FutureData::Get() ? internal::FutureData::Get()->api()
+                                          : nullptr;
+  if (!api) {
+    return Future<void>();
+  }
+  return static_cast<const Future<void>&>(
+      api->LastResult(internal::kAnalyticsFnLogAppleTransaction));
+}
+
 // Log an event with associated parameters.
 void LogEvent(const char* name, const Parameter* parameters,
               size_t number_of_parameters) {
diff --git a/analytics/src/analytics_common.h b/analytics/src/analytics_common.h
index 90de297d7a..edad4ce07f 100644
--- a/analytics/src/analytics_common.h
+++ b/analytics/src/analytics_common.h
@@ -24,9 +24,10 @@ namespace analytics {
 namespace internal {
 
 enum AnalyticsFn {
-  kAnalyticsFnGetAnalyticsInstanceId,
+  kAnalyticsFnGetAnalyticsInstanceId = 0,
   kAnalyticsFnGetSessionId,
-  kAnalyticsFnCount
+  kAnalyticsFnLogAppleTransaction,
+  kAnalyticsFnCount,
 };
 
 // Data structure which holds the Future API for this module.
diff --git a/analytics/src/analytics_desktop.cc b/analytics/src/analytics_desktop.cc
index 880c3936a9..c3181621e9 100644
--- a/analytics/src/analytics_desktop.cc
+++ b/analytics/src/analytics_desktop.cc
@@ -467,6 +467,30 @@ void LogEvent(const char* name) {
   LogEvent(name, static_cast<const Parameter*>(nullptr), 0);
 }
 
+/// Log an Apple StoreKit 2 transaction. This is a no-op on Desktop and returns
+/// success.
+Future<void> LogAppleTransaction(const char* transaction_id) {
+  auto* api = internal::FutureData::Get() ? internal::FutureData::Get()->api()
+                                          : nullptr;
+  if (!api) {
+    return Future<void>();
+  }
+  const auto future_handle =
+      api->SafeAlloc<void>(internal::kAnalyticsFnLogAppleTransaction);
+  api->Complete(future_handle, 0, "");
+  return Future<void>(api, future_handle.get());
+}
+
+Future<void> LogAppleTransactionLastResult() {
+  auto* api = internal::FutureData::Get() ? internal::FutureData::Get()->api()
+                                          : nullptr;
+  if (!api) {
+    return Future<void>();
+  }
+  return static_cast<const Future<void>&>(
+      api->LastResult(internal::kAnalyticsFnLogAppleTransaction));
+}
+
 void LogEvent(const char* name, const char* parameter_name,
               const char* parameter_value) {
   if (parameter_name == nullptr) {
diff --git a/analytics/src/analytics_ios.mm b/analytics/src/analytics_ios.mm
index 38aa5275e7..92c852ba88 100644
--- a/analytics/src/analytics_ios.mm
+++ b/analytics/src/analytics_ios.mm
@@ -20,9 +20,12 @@
 #import "FIRAnalytics+OnDevice.h"
 #import "FIRAnalytics.h"
 
+#include "analytics/src/analytics_common.h"
 #include "analytics/src/include/firebase/analytics.h"
 
-#include "analytics/src/analytics_common.h"
+// Include the generated Swift header for the C++ bridge.
+#include <firebase_analytics/firebase_analytics-Swift.h>
+
 #include "app/src/assert.h"
 #include "app/src/include/firebase/internal/mutex.h"
 #include "app/src/include/firebase/version.h"
@@ -231,6 +234,55 @@ void LogEvent(const char* name) {
   [FIRAnalytics logEventWithName:@(name) parameters:@{}];
 }
 
+extern "C" {
+void CompleteLogAppleTransaction(const void* context, bool success) {
+  FIREBASE_ASSERT_RETURN_VOID(context != nullptr);
+  auto* handle_ptr = static_cast<SafeFutureHandle<void>*>(const_cast<void*>(context));
+
+  MutexLock lock(g_mutex);
+  if (!internal::IsInitialized()) {
+    delete handle_ptr;
+    return;
+  }
+
+  auto* api = internal::FutureData::Get()->api();
+  if (success) {
+    api->Complete(*handle_ptr, 0, "");
+  } else {
+    api->Complete(*handle_ptr, -1, "StoreKit 2 transaction not found.");
+  }
+  delete handle_ptr;
+}
+}
+
+Future<void> LogAppleTransaction(const char* transaction_id) {
+  MutexLock lock(g_mutex);
+  FIREBASE_ASSERT_RETURN(Future<void>(), internal::IsInitialized());
+
+  auto* api = internal::FutureData::Get()->api();
+  const auto future_handle = api->SafeAlloc<void>(internal::kAnalyticsFnLogAppleTransaction);
+
+  if (!transaction_id) {
+    api->Complete(future_handle, -1, "Transaction ID is null");
+    return Future<void>(api, future_handle.get());
+  }
+
+  SafeFutureHandle<void>* handle_ptr = new SafeFutureHandle<void>(future_handle);
+
+  [StoreKit2Bridge logTransaction:SafeString(transaction_id)
+                          context:handle_ptr
+                       completion:CompleteLogAppleTransaction];
+
+  return Future<void>(api, future_handle.get());
+}
+
+Future<void> LogAppleTransactionLastResult() {
+  MutexLock lock(g_mutex);
+  FIREBASE_ASSERT_RETURN(Future<void>(), internal::IsInitialized());
+  return static_cast<const Future<void>&>(
+      internal::FutureData::Get()->api()->LastResult(internal::kAnalyticsFnLogAppleTransaction));
+}
+
 // Declared here so that it can be used, defined below.
 NSDictionary* MapToDictionary(const std::map<Variant, Variant>& map);
 
diff --git a/analytics/src/include/firebase/analytics.h b/analytics/src/include/firebase/analytics.h
index 47a5aab72b..fcdb723403 100644
--- a/analytics/src/include/firebase/analytics.h
+++ b/analytics/src/include/firebase/analytics.h
@@ -455,6 +455,37 @@ void LogEvent(const char* name, const char* parameter_name,
 /// @endif
 void LogEvent(const char* name);
 
+/// @brief Logs an in-app purchase transaction specifically for Apple's
+/// StoreKit 2.
+///
+/// This function is intended for developers on iOS who process transactions
+/// via custom native plugins or engines and need to securely log those
+/// transactions natively through Google Analytics. The provided ID must map 1:1
+/// with the native Apple `Transaction.id`. If a matching transaction is not
+/// found in the Apple device's purchase history, nothing will be logged to
+/// Analytics.
+///
+/// @note Finished consumable transactions are removed from the local
+///       transaction history and cannot be retrieved by this function once
+///       finished. Developers should either call this function before finishing
+///       the transaction or use `FirebaseAnalytics.LogEvent` directly as a
+///       fallback.
+///
+/// @param transaction_id The native Apple transaction identifier as a
+///                       null-terminated string.
+///
+/// @returns A Future<void> that completes successfully when the native
+///          StoreKit 2 transaction is found and logged. If the transaction
+///          cannot be found, the Future will complete with a non-zero error().
+Future<void> LogAppleTransaction(const char* transaction_id);
+
+/// @brief Get the result of the most recent LogAppleTransaction() call.
+///
+/// @returns A Future<void> that completes successfully when the native
+///          StoreKit 2 transaction is found and logged. If the transaction
+///          cannot be found, the Future will complete with a non-zero error().
+Future<void> LogAppleTransactionLastResult();
+
 /// @brief Log an event with associated parameters.
 ///
 /// An Event is an important occurrence in your app that you want to
diff --git a/analytics/src/ios/swift/StoreKit2Bridge.swift b/analytics/src/ios/swift/StoreKit2Bridge.swift
new file mode 100644
index 0000000000..1b7c1edeba
--- /dev/null
+++ b/analytics/src/ios/swift/StoreKit2Bridge.swift
@@ -0,0 +1,37 @@
+// Copyright 2026 Google
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import Foundation
+import StoreKit
+import FirebaseAnalytics
+
+@objc public class StoreKit2Bridge: NSObject {
+
+    @objc public static func logTransaction(_ transactionId: String, context: UnsafeRawPointer, completion: @escaping @convention(c) (UnsafeRawPointer, Bool) -> Void) {
+        if #available(iOS 15.0, tvOS 15.0, macOS 12.0, watchOS 8.0, *) {
+            Task {
+                for await case .verified(let transaction) in Transaction.all {
+                    if String(transaction.id) == transactionId {
+                        Analytics.logTransaction(transaction)
+                        completion(context, true)
+                        return
+                    }
+                }
+                completion(context, false)
+            }
+        } else {
+            completion(context, false)
+        }
+    }
+}
\ No newline at end of file
diff --git a/app/CMakeLists.txt b/app/CMakeLists.txt
index c92f9124f8..2bd4e3f07e 100644
--- a/app/CMakeLists.txt
+++ b/app/CMakeLists.txt
@@ -320,6 +320,9 @@ add_library(firebase_app STATIC
     ${FIREBASE_GEN_FILE_DIR}/app/google_services_generated.h
     ${app_flatbuffers_srcs})
 
+add_dependencies(firebase_app FIREBASE_APP_GENERATED_HEADERS)
+add_dependencies(firebase_app app_generated_google_services_includes)
+
 set_property(TARGET firebase_app PROPERTY FOLDER "Firebase Cpp")
 
 # Disable exceptions in std
@@ -364,22 +367,19 @@ target_link_libraries(firebase_app
     ${app_flatbuffers_lib}
     ${LIBSECRET_LIBRARIES}
 )
-# Automatically include headers that might not be declared.
-if(MSVC)
-  add_definitions(/FI"assert.h" /FI"string.h" /FI"stdint.h")
-else()
-  add_definitions(-include assert.h -include string.h)
-endif()
+  target_compile_options(firebase_app PRIVATE
+    "$<$<COMPILE_LANGUAGE:CXX>:SHELL:-include assert.h>"
+    "$<$<COMPILE_LANGUAGE:CXX>:SHELL:-include string.h>"
+    "$<$<COMPILE_LANGUAGE:OBJCXX>:SHELL:-include assert.h>"
+    "$<$<COMPILE_LANGUAGE:OBJCXX>:SHELL:-include string.h>")
 
 if(ANDROID)
   firebase_cpp_proguard_file(app)
 elseif(IOS)
   # Enable Automatic Reference Counting (ARC) and Bitcode.
+  # Enable Automatic Reference Counting (ARC) for Objective-C/Swift interop
   target_compile_options(firebase_app
-                         PUBLIC "-fobjc-arc" "-fembed-bitcode")
-  target_link_libraries(firebase_app
-                        PUBLIC "-fembed-bitcode")
-
+                         PUBLIC $<$<NOT:$<COMPILE_LANGUAGE:Swift>>:-fobjc-arc>)
   # Add empty include path to get root include folder '.'
   setup_pod_headers(
     firebase_app
@@ -417,38 +417,16 @@ if (IOS)
     )
   endif()
 
-  # Generate the analytics header file
-  # Copy from analytics/CMakeList.txt
-  function(generate_analytics_header OBJC_FILE CPP_FILE)
-    add_custom_command(
-      OUTPUT ${CPP_FILE}
-      COMMAND ${FIREBASE_PYTHON_EXECUTABLE} "${FIREBASE_SOURCE_DIR}/analytics/generate_constants.py"
-        "--objc_header=${OBJC_FILE}"
-        "--cpp_header=${CPP_FILE}"
-      DEPENDS ${OBJC_FILE}
-      COMMENT "Generating ${CPP_FILE}"
-    )
-  endfunction()
-  set(analytics_generated_headers_dir
-    ${FIREBASE_GEN_FILE_DIR}/analytics/src/include/firebase/analytics)
-  file(MAKE_DIRECTORY ${FIREBASE_GEN_FILE_DIR}/analytics/src/include/firebase/analytics)
-  generate_analytics_header(
-    "${FIREBASE_SOURCE_DIR}/analytics/ios_headers/FIREventNames.h"
-    "${analytics_generated_headers_dir}/event_names.h"
-  )
-  generate_analytics_header(
-    "${FIREBASE_SOURCE_DIR}/analytics/ios_headers/FIRParameterNames.h"
-    "${analytics_generated_headers_dir}/parameter_names.h"
-  )
-  generate_analytics_header(
-    "${FIREBASE_SOURCE_DIR}/analytics/ios_headers/FIRUserPropertyNames.h"
-    "${analytics_generated_headers_dir}/user_property_names.h"
-  )
-  set(analytics_HDRS
-    ${FIREBASE_SOURCE_DIR}/analytics/src/include/firebase/analytics.h
-    ${analytics_generated_headers_dir}/event_names.h
-    ${analytics_generated_headers_dir}/parameter_names.h
-    ${analytics_generated_headers_dir}/user_property_names.h)
+  if (FIREBASE_XCODE_TARGET_FORMAT STREQUAL "frameworks")
+    if (FIREBASE_INCLUDE_ANALYTICS)
+      set(analytics_HDRS
+      ${FIREBASE_SOURCE_DIR}/analytics/src/include/firebase/analytics.h
+      ${FIREBASE_GEN_FILE_DIR}/analytics/src/include/firebase/analytics/event_names.h
+      ${FIREBASE_GEN_FILE_DIR}/analytics/src/include/firebase/analytics/parameter_names.h
+      ${FIREBASE_GEN_FILE_DIR}/analytics/src/include/firebase/analytics/user_property_names.h)
+    else()
+      set(analytics_HDRS "")
+    endif()
   set(app_check_HDRS
     ${FIREBASE_SOURCE_DIR}/app_check/src/include/firebase/app_check.h
     ${FIREBASE_SOURCE_DIR}/app_check/src/include/firebase/app_check/app_attest_provider.h
@@ -470,35 +448,39 @@ if (IOS)
     ${FIREBASE_SOURCE_DIR}/database/src/include/firebase/database/mutable_data.h
     ${FIREBASE_SOURCE_DIR}/database/src/include/firebase/database/query.h
     ${FIREBASE_SOURCE_DIR}/database/src/include/firebase/database/transaction.h)
-  set(firestore_HDRS
-    ${FIREBASE_SOURCE_DIR}/firestore/src/include/firebase/firestore.h
-    ${FIREBASE_SOURCE_DIR}/firestore/src/include/firebase/firestore/aggregate_query.h
-    ${FIREBASE_SOURCE_DIR}/firestore/src/include/firebase/firestore/aggregate_query_snapshot.h
-    ${FIREBASE_SOURCE_DIR}/firestore/src/include/firebase/firestore/aggregate_source.h
-    ${FIREBASE_SOURCE_DIR}/firestore/src/include/firebase/firestore/collection_reference.h
-    ${FIREBASE_SOURCE_DIR}/firestore/src/include/firebase/firestore/document_change.h
-    ${FIREBASE_SOURCE_DIR}/firestore/src/include/firebase/firestore/document_reference.h
-    ${FIREBASE_SOURCE_DIR}/firestore/src/include/firebase/firestore/document_snapshot.h
-    ${FIREBASE_SOURCE_DIR}/firestore/src/include/firebase/firestore/field_path.h
-    ${FIREBASE_SOURCE_DIR}/firestore/src/include/firebase/firestore/field_value.h
-    ${FIREBASE_SOURCE_DIR}/firestore/src/include/firebase/firestore/filter.h
-    ${FIREBASE_SOURCE_DIR}/firestore/src/include/firebase/firestore/listener_registration.h
-    ${FIREBASE_SOURCE_DIR}/firestore/src/include/firebase/firestore/load_bundle_task_progress.h
-    ${FIREBASE_SOURCE_DIR}/firestore/src/include/firebase/firestore/map_field_value.h
-    ${FIREBASE_SOURCE_DIR}/firestore/src/include/firebase/firestore/metadata_changes.h
-    ${FIREBASE_SOURCE_DIR}/firestore/src/include/firebase/firestore/query_snapshot.h
-    ${FIREBASE_SOURCE_DIR}/firestore/src/include/firebase/firestore/query.h
-    ${FIREBASE_SOURCE_DIR}/firestore/src/include/firebase/firestore/set_options.h
-    ${FIREBASE_SOURCE_DIR}/firestore/src/include/firebase/firestore/settings.h
-    ${FIREBASE_SOURCE_DIR}/firestore/src/include/firebase/firestore/snapshot_metadata.h
-    ${FIREBASE_SOURCE_DIR}/firestore/src/include/firebase/firestore/source.h
-    ${FIREBASE_SOURCE_DIR}/firestore/src/include/firebase/firestore/transaction.h
-    ${FIREBASE_SOURCE_DIR}/firestore/src/include/firebase/firestore/transaction_options.h
-    ${FIREBASE_SOURCE_DIR}/firestore/src/include/firebase/firestore/write_batch.h
-    ${FIREBASE_POD_DIR}/Pods/FirebaseFirestoreInternal/Firestore/core/include/firebase/firestore/firestore_errors.h
-    ${FIREBASE_POD_DIR}/Pods/FirebaseFirestoreInternal/Firestore/core/include/firebase/firestore/firestore_version.h
-    ${FIREBASE_POD_DIR}/Pods/FirebaseFirestoreInternal/Firestore/core/include/firebase/firestore/geo_point.h
-    ${FIREBASE_POD_DIR}/Pods/FirebaseFirestoreInternal/Firestore/core/include/firebase/firestore/timestamp.h)
+  if (EXISTS "${FIREBASE_POD_DIR}/Pods/FirebaseFirestoreInternal")
+    set(firestore_HDRS
+      ${FIREBASE_SOURCE_DIR}/firestore/src/include/firebase/firestore.h
+      ${FIREBASE_SOURCE_DIR}/firestore/src/include/firebase/firestore/aggregate_query.h
+      ${FIREBASE_SOURCE_DIR}/firestore/src/include/firebase/firestore/aggregate_query_snapshot.h
+      ${FIREBASE_SOURCE_DIR}/firestore/src/include/firebase/firestore/aggregate_source.h
+      ${FIREBASE_SOURCE_DIR}/firestore/src/include/firebase/firestore/collection_reference.h
+      ${FIREBASE_SOURCE_DIR}/firestore/src/include/firebase/firestore/document_change.h
+      ${FIREBASE_SOURCE_DIR}/firestore/src/include/firebase/firestore/document_reference.h
+      ${FIREBASE_SOURCE_DIR}/firestore/src/include/firebase/firestore/document_snapshot.h
+      ${FIREBASE_SOURCE_DIR}/firestore/src/include/firebase/firestore/field_path.h
+      ${FIREBASE_SOURCE_DIR}/firestore/src/include/firebase/firestore/field_value.h
+      ${FIREBASE_SOURCE_DIR}/firestore/src/include/firebase/firestore/filter.h
+      ${FIREBASE_SOURCE_DIR}/firestore/src/include/firebase/firestore/listener_registration.h
+      ${FIREBASE_SOURCE_DIR}/firestore/src/include/firebase/firestore/load_bundle_task_progress.h
+      ${FIREBASE_SOURCE_DIR}/firestore/src/include/firebase/firestore/map_field_value.h
+      ${FIREBASE_SOURCE_DIR}/firestore/src/include/firebase/firestore/metadata_changes.h
+      ${FIREBASE_SOURCE_DIR}/firestore/src/include/firebase/firestore/query_snapshot.h
+      ${FIREBASE_SOURCE_DIR}/firestore/src/include/firebase/firestore/query.h
+      ${FIREBASE_SOURCE_DIR}/firestore/src/include/firebase/firestore/set_options.h
+      ${FIREBASE_SOURCE_DIR}/firestore/src/include/firebase/firestore/settings.h
+      ${FIREBASE_SOURCE_DIR}/firestore/src/include/firebase/firestore/snapshot_metadata.h
+      ${FIREBASE_SOURCE_DIR}/firestore/src/include/firebase/firestore/source.h
+      ${FIREBASE_SOURCE_DIR}/firestore/src/include/firebase/firestore/transaction.h
+      ${FIREBASE_SOURCE_DIR}/firestore/src/include/firebase/firestore/transaction_options.h
+      ${FIREBASE_SOURCE_DIR}/firestore/src/include/firebase/firestore/write_batch.h
+      ${FIREBASE_POD_DIR}/Pods/FirebaseFirestoreInternal/Firestore/core/include/firebase/firestore/firestore_errors.h
+      ${FIREBASE_POD_DIR}/Pods/FirebaseFirestoreInternal/Firestore/core/include/firebase/firestore/firestore_version.h
+      ${FIREBASE_POD_DIR}/Pods/FirebaseFirestoreInternal/Firestore/core/include/firebase/firestore/geo_point.h
+      ${FIREBASE_POD_DIR}/Pods/FirebaseFirestoreInternal/Firestore/core/include/firebase/firestore/timestamp.h)
+  else()
+    set(firestore_HDRS "")
+  endif()
   set(functions_HDRS
     ${FIREBASE_SOURCE_DIR}/functions/src/include/firebase/functions.h
     ${FIREBASE_SOURCE_DIR}/functions/src/include/firebase/functions/callable_reference.h
@@ -563,4 +545,5 @@ if (IOS)
   # to destination dir "Headers/google_play_services/*"
   set_property(SOURCE "src/include/google_play_services/availability.h" PROPERTY 
                   MACOSX_PACKAGE_LOCATION Headers/google_play_services)
+  endif() # framework_HDRS
 endif()
diff --git a/release_build_files/readme.md b/release_build_files/readme.md
index 6c963edd74..4bdf08fc37 100644
--- a/release_build_files/readme.md
+++ b/release_build_files/readme.md
@@ -617,6 +617,7 @@ code.
 - Changes 
     - Functions (general): Add in support for Limited Use Tokens.
     - Storage: Added `List` API for all platforms, which gets the list of items under a `StorageReference`
+    - Analytics: Add in `LogAppleTransaction` for logging Storekit 2 transactions on iOS.
 
 ### 13.5.0
 -   Changes
diff --git a/scripts/gha/build_ios_tvos.py b/scripts/gha/build_ios_tvos.py
index 7fe86343e6..760d7e5f42 100644
--- a/scripts/gha/build_ios_tvos.py
+++ b/scripts/gha/build_ios_tvos.py
@@ -85,6 +85,26 @@ def arrange_frameworks(archive_output_path):
       archive_output_path (str): Output path containing frameworks.
         Subdirectories should be the various target frameworks.
   """
+  if not os.path.exists(archive_output_path):
+    logging.warning('Skipping arrange_frameworks for missing path: ' + archive_output_path)
+    return
+
+  # Pull output out of Debug subdirectory if using multi-configuration generator (Xcode)
+  for entry in os.listdir(archive_output_path):
+    if entry.startswith('Debug') and os.path.isdir(os.path.join(archive_output_path, entry)):
+      debug_path = os.path.join(archive_output_path, entry)
+      logging.info('Pulling output out of subdirectory ' + debug_path)
+      for sub_entry in os.listdir(debug_path):
+        src = os.path.join(debug_path, sub_entry)
+        dest = os.path.join(archive_output_path, sub_entry)
+        if os.path.exists(dest):
+          if os.path.isdir(dest):
+            shutil.rmtree(dest)
+          else:
+            os.remove(dest)
+        shutil.move(src, archive_output_path)
+      os.rmdir(debug_path)
+
   archive_output_dir_entries = os.listdir(archive_output_path)
   if not 'firebase.framework' in archive_output_dir_entries:
     # Rename firebase_app path to firebase path
@@ -176,6 +196,8 @@ def build_universal_framework(frameworks_path, targets):
     platform_variant_architecture_dirs = os.listdir(framework_os_path)
     platform_variant_arch_map = defaultdict(list)
     for variant_architecture in platform_variant_architecture_dirs:
+      if '-' not in variant_architecture:
+        continue
       logging.debug('Inspecting ' + variant_architecture)
       platform_variant, architecture = variant_architecture.split('-')
       platform_variant_arch_map[platform_variant].append(architecture)
@@ -199,9 +221,9 @@ def build_universal_framework(frameworks_path, targets):
       return
 
     # Pick any of the platform-arch directories as a reference candidate mainly
-    # for obtaining a list of contained targets.
-    reference_dir_path = os.path.join(framework_os_path,
-                                      platform_variant_architecture_dirs[0])
+    # for obtaining a list of contained targets. Skip 'universal' if it's there.
+    valid_dirs = [d for d in platform_variant_architecture_dirs if d != 'universal']
+    reference_dir_path = os.path.join(framework_os_path, valid_dirs[0])
     logging.debug('Using {0} as reference path for scanning '
                   'targets'.format(reference_dir_path))
     # Filter only .framework directories and make sure the framework is
@@ -218,9 +240,7 @@ def build_universal_framework(frameworks_path, targets):
       # Eg: split firebase_auth.framework -> firebase_auth, .framework
       target, _ = os.path.splitext(target_framework)
       for variant_architecture_dir in platform_variant_architecture_dirs:
-        # Since we have arm64 for both device and simulator, lipo cannot combine
-        # them in the same fat file. We ignore simulator-arm64.
-        if variant_architecture_dir == 'simulator-arm64':
+        if variant_architecture_dir == 'simulator-arm64' or variant_architecture_dir == 'universal':
           continue
         # <build_dir>/<apple_os>/frameworks/<platform-arch>/
         # <target>.framework/target
@@ -233,7 +253,7 @@ def build_universal_framework(frameworks_path, targets):
       universal_target_path = os.path.join(framework_os_path, 'universal',
                                           target_framework)
       logging.debug('Ensuring all directories exist: ' + universal_target_path)
-      os.makedirs(universal_target_path)
+      os.makedirs(universal_target_path, exist_ok=True)
       # <build_dir>/<apple_os>/frameworks/universal/<target>.framework/<target>
       universal_target_library_path = os.path.join(universal_target_path,
                                                    target)
@@ -259,7 +279,8 @@ def build_universal_framework(frameworks_path, targets):
                                                   'Headers')
 
     shutil.copytree(firebase_framework_headers_path,
-                    universal_firebase_framework_headers_path)
+                    universal_firebase_framework_headers_path,
+                    dirs_exist_ok=True)
 
 
 def build_xcframeworks(frameworks_path, xcframeworks_path, template_info_plist,
@@ -389,7 +410,7 @@ def build_xcframeworks(frameworks_path, xcframeworks_path, template_info_plist,
                                           xcframework_key,
                                           '{0}.framework'.format(target))
         logging.debug('Ensuring all directories exist: ' + library_output_dir)
-        os.makedirs(library_output_dir)
+        os.makedirs(library_output_dir, exist_ok=True)
         cmd = ['lipo', '-create']
         cmd.extend(xcframework_libraries)
         cmd.append('-output')
@@ -456,7 +477,7 @@ def cmake_configure(source_path, build_path, toolchain, archive_output_path,
         system. Used when building for ios/tvos. (eg:'arm64', 'x86_64')
       apple_os (str, optional): The Apple OS to build for.
   """
-  cmd = ['cmake', '-S', source_path, '-B', build_path]
+  cmd = ['cmake', '-S', source_path, '-B', build_path, '-G', 'Xcode']
   if toolchain:
     cmd.append('-DCMAKE_TOOLCHAIN_FILE={0}'.format(toolchain))
   elif apple_os == 'ios':
@@ -468,6 +489,8 @@ def cmake_configure(source_path, build_path, toolchain, archive_output_path,
     if platform_variant == 'simulator':
       cmd.append('-DCMAKE_OSX_SYSROOT=appletvsimulator')
   cmd.append('-DCMAKE_ARCHIVE_OUTPUT_DIRECTORY={0}'.format(archive_output_path))
+  cmd.append('-DCMAKE_LIBRARY_OUTPUT_DIRECTORY={0}'.format(archive_output_path))
+  cmd.append('-DCMAKE_RUNTIME_OUTPUT_DIRECTORY={0}'.format(archive_output_path))
   if architecture:
     cmd.append('-DCMAKE_OSX_ARCHITECTURES={0}'.format(architecture))
   utils.run_command(cmd)
diff --git a/test_mac_ios_simulator.sh b/test_mac_ios_simulator.sh
old mode 100644
new mode 100755
index 7fc9fa5e3f..ec98fb58fc
--- a/test_mac_ios_simulator.sh
+++ b/test_mac_ios_simulator.sh
@@ -25,11 +25,8 @@ set -x
 mkdir -p mac_ios_simulator_build
 cd mac_ios_simulator_build
 
-# Configure cmake with tests enabled
-# and disable use of libsecret due to not working on kokoro builders
-cmake -DCMAKE_SYSTEM_NAME=iOS -DCMAKE_OSX_SYSROOT=iphonesimulator .. -DCLANG_ENABLE_MODULES=YES -DFIREBASE_CPP_BUILD_TESTS=ON -DFIREBASE_FORCE_FAKE_SECURE_STORAGE=ON "$@"
+cmake -G Xcode -DCMAKE_SYSTEM_NAME=iOS -DCMAKE_OSX_SYSROOT=iphonesimulator .. -DCLANG_ENABLE_MODULES=YES -DFIREBASE_CPP_BUILD_TESTS=ON -DFIREBASE_FORCE_FAKE_SECURE_STORAGE=ON "$@"
 
 # Build the SDK and the tests
-cpus=$(sysctl -n hw.ncpu)
-cmake --build . -- -j $(cpus)
+cmake --build .
 

From 5f9cffddd8fc39a0d88db644d2760bf4c65bb237 Mon Sep 17 00:00:00 2001
From: AustinBenoit <austinbenoit@google.com>
Date: Thu, 9 Apr 2026 09:45:27 -0400
Subject: [PATCH 2/9] Add conditional building for win / android and make the
 build.sh changed as I have make the complier xcode

---
 analytics/CMakeLists.txt   | 27 +++++++++++++++++++--------
 app/CMakeLists.txt         |  6 ++++++
 build_scripts/ios/build.sh |  8 ++++++--
 3 files changed, 31 insertions(+), 10 deletions(-)

diff --git a/analytics/CMakeLists.txt b/analytics/CMakeLists.txt
index b40b6c78d0..e45f1f12c1 100644
--- a/analytics/CMakeLists.txt
+++ b/analytics/CMakeLists.txt
@@ -130,15 +130,26 @@ target_compile_definitions(firebase_analytics
     -DINTERNAL_EXPERIMENTAL=1
 )
 # Automatically include headers that might not be declared.
-if(MSVC)
-  target_compile_options(firebase_analytics PRIVATE
-    $<$<NOT:$<COMPILE_LANGUAGE:Swift>>:/FI"assert.h">
-    $<$<NOT:$<COMPILE_LANGUAGE:Swift>>:/FI"string.h">
-    $<$<NOT:$<COMPILE_LANGUAGE:Swift>>:/FI"stdint.h">)
+if(IOS)
+  if(MSVC)
+    target_compile_options(firebase_analytics PRIVATE
+      $<$<NOT:$<COMPILE_LANGUAGE:Swift>>:/FI"assert.h">
+      $<$<NOT:$<COMPILE_LANGUAGE:Swift>>:/FI"string.h">
+      $<$<NOT:$<COMPILE_LANGUAGE:Swift>>:/FI"stdint.h">)
+  else()
+    target_compile_options(firebase_analytics PRIVATE
+      $<$<NOT:$<COMPILE_LANGUAGE:Swift>>:SHELL:-include assert.h -include string.h>
+    )
+  endif()
 else()
-  target_compile_options(firebase_analytics PRIVATE
-    $<$<NOT:$<COMPILE_LANGUAGE:Swift>>:SHELL:-include assert.h -include string.h>
-  )
+  if(MSVC)
+    target_compile_options(firebase_analytics PRIVATE
+      /FI"assert.h" /FI"string.h" /FI"stdint.h")
+  else()
+    target_compile_options(firebase_analytics PRIVATE
+      SHELL:-include assert.h -include string.h
+    )
+  endif()
 endif()
 
 if(ANDROID)
diff --git a/app/CMakeLists.txt b/app/CMakeLists.txt
index 2bd4e3f07e..4284641de0 100644
--- a/app/CMakeLists.txt
+++ b/app/CMakeLists.txt
@@ -367,11 +367,17 @@ target_link_libraries(firebase_app
     ${app_flatbuffers_lib}
     ${LIBSECRET_LIBRARIES}
 )
+if(APPLE)
   target_compile_options(firebase_app PRIVATE
     "$<$<COMPILE_LANGUAGE:CXX>:SHELL:-include assert.h>"
     "$<$<COMPILE_LANGUAGE:CXX>:SHELL:-include string.h>"
     "$<$<COMPILE_LANGUAGE:OBJCXX>:SHELL:-include assert.h>"
     "$<$<COMPILE_LANGUAGE:OBJCXX>:SHELL:-include string.h>")
+else()
+  target_compile_options(firebase_app PRIVATE
+    "$<$<COMPILE_LANGUAGE:CXX>:SHELL:-include assert.h>"
+    "$<$<COMPILE_LANGUAGE:CXX>:SHELL:-include string.h>")
+endif()
 
 if(ANDROID)
   firebase_cpp_proguard_file(app)
diff --git a/build_scripts/ios/build.sh b/build_scripts/ios/build.sh
index 73af95608f..b4c3521aa3 100755
--- a/build_scripts/ios/build.sh
+++ b/build_scripts/ios/build.sh
@@ -1,5 +1,7 @@
 #!/bin/bash -e
 
+export LANG=en_US.UTF-8
+
 # Copyright 2020 Google LLC
 #
 # Script to build iOS XCFrameworks
@@ -123,7 +125,7 @@ if ${generateMakefiles}; then
         for arch in ${architectures[@]}; do 
             sysroot_arg=""
             if [[ "${platform}" == "device" && " ${DEVICE_ARCHITECTURES[@]} " =~ " ${arch} " ]]; then
-                sysroot_arg="" # Default iphoneos sysroot is correct for iOS devices
+                sysroot_arg="-DCMAKE_OSX_SYSROOT=iphoneos"
             elif [[ "${platform}" == "simulator" && " ${SIMULATOR_ARCHITECTURES[@]} " =~ " ${arch} " ]]; then
                 sysroot_arg="-DCMAKE_OSX_SYSROOT=iphonesimulator" # Must specify sysroot for simulator, especially for x86_64
             else
@@ -132,10 +134,12 @@ if ${generateMakefiles}; then
 
             echo "generate Makefiles start"
             mkdir -p ${buildpath}/ios_build_file/${platform}-${arch} && cd ${buildpath}/ios_build_file/${platform}-${arch}
-            cmake -DCMAKE_SYSTEM_NAME=iOS \
+            cmake -G Xcode -DCMAKE_SYSTEM_NAME=iOS \
                 ${sysroot_arg} \
                 -DCMAKE_OSX_ARCHITECTURES=${arch} \
                 -DCMAKE_ARCHIVE_OUTPUT_DIRECTORY=${buildpath}/${frameworkspath}/${platform}-${arch} \
+                -DCMAKE_ARCHIVE_OUTPUT_DIRECTORY_DEBUG=${buildpath}/${frameworkspath}/${platform}-${arch} \
+                -DCMAKE_ARCHIVE_OUTPUT_DIRECTORY_RELEASE=${buildpath}/${frameworkspath}/${platform}-${arch} \
                 ${sourcepath}
             echo "generate Makefiles end"
         done

From 395fdc342377320ff9ff8860b3f085e724cce233 Mon Sep 17 00:00:00 2001
From: AustinBenoit <austinbenoit@google.com>
Date: Thu, 9 Apr 2026 10:07:04 -0400
Subject: [PATCH 3/9] Linux fix

---
 CMakeLists.txt | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index f956830507..6c90218bf4 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -18,6 +18,9 @@ cmake_minimum_required(VERSION 3.22)
 
 set (CMAKE_CXX_STANDARD 14)
 set (CMAKE_CXX_STANDARD_REQUIRED YES)  # Don't fall back to an earlier version.
+if(CMAKE_SYSTEM_NAME STREQUAL "Linux")
+  add_compile_definitions(_GNU_SOURCE)
+endif()
 
 # Turn on virtual folders for visual studio
 set_property(GLOBAL PROPERTY USE_FOLDERS ON)

From 8db868288e6f3276ffb07a4ebde246a7ae2e71ad Mon Sep 17 00:00:00 2001
From: AustinBenoit <austinbenoit@google.com>
Date: Thu, 9 Apr 2026 10:23:25 -0400
Subject: [PATCH 4/9] Clean up

---
 analytics/CMakeLists.txt                    | 17 +++++++----------
 app/src/secure/user_secure_fake_internal.cc |  1 +
 2 files changed, 8 insertions(+), 10 deletions(-)

diff --git a/analytics/CMakeLists.txt b/analytics/CMakeLists.txt
index e45f1f12c1..7ceb30e6ee 100644
--- a/analytics/CMakeLists.txt
+++ b/analytics/CMakeLists.txt
@@ -165,7 +165,6 @@ elseif(IOS)
       "$(DERIVED_FILE_DIR)"
   )
  
-if(IOS OR TVOS)
   # Swift needs to find the FirebaseAnalytics module from CocoaPods
   set(pods_dir "${FIREBASE_POD_DIR}/Pods")
   
@@ -173,19 +172,18 @@ if(IOS OR TVOS)
   # Xcode natively handles XCFrameworks and will pick the right slice automatically.
   # Determine the xcframework architecture slice based on the target platform
   # and if it is running on simulator or device.
-  if(IOS)
-    string(TOLOWER "${CMAKE_OSX_SYSROOT}" sysroot_lower)
+  string(TOLOWER "${CMAKE_OSX_SYSROOT}" sysroot_lower)
+  if(CMAKE_SYSTEM_NAME STREQUAL "tvOS")
     if(sysroot_lower MATCHES "simulator")
-      set(analytics_slice "ios-arm64_x86_64-simulator")
+      set(analytics_slice "tvos-arm64_x86_64-simulator")
     else()
-      set(analytics_slice "ios-arm64")
+      set(analytics_slice "tvos-arm64")
     endif()
-  elseif(TVOS)
-    string(TOLOWER "${CMAKE_OSX_SYSROOT}" sysroot_lower)
+  else()
     if(sysroot_lower MATCHES "simulator")
-      set(analytics_slice "tvos-arm64_x86_64-simulator")
+      set(analytics_slice "ios-arm64_x86_64-simulator")
     else()
-      set(analytics_slice "tvos-arm64")
+      set(analytics_slice "ios-arm64")
     endif()
   endif()
 
@@ -208,7 +206,6 @@ if(IOS OR TVOS)
   set_target_properties(firebase_analytics PROPERTIES
     XCODE_ATTRIBUTE_ONLY_ACTIVE_ARCH "YES"
   )
-endif()
 
   setup_pod_headers(
     firebase_analytics
diff --git a/app/src/secure/user_secure_fake_internal.cc b/app/src/secure/user_secure_fake_internal.cc
index 5271d16aff..1b524e2a60 100644
--- a/app/src/secure/user_secure_fake_internal.cc
+++ b/app/src/secure/user_secure_fake_internal.cc
@@ -29,6 +29,7 @@
 #include <errno.h>
 
 #include <cstdio>
+#include <cstring>
 #include <fstream>
 #include <string>
 

From 5b2c2622438a8cd8a3fecf52c08ae8b64e1537a6 Mon Sep 17 00:00:00 2001
From: AustinBenoit <austinbenoit@google.com>
Date: Thu, 9 Apr 2026 10:36:22 -0400
Subject: [PATCH 5/9] revert the to include the old way of header generator

---
 app/CMakeLists.txt | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/app/CMakeLists.txt b/app/CMakeLists.txt
index 4284641de0..852f30d9a9 100644
--- a/app/CMakeLists.txt
+++ b/app/CMakeLists.txt
@@ -367,7 +367,10 @@ target_link_libraries(firebase_app
     ${app_flatbuffers_lib}
     ${LIBSECRET_LIBRARIES}
 )
-if(APPLE)
+if(MSVC)
+  target_compile_options(firebase_app PRIVATE
+    $<$<COMPILE_LANGUAGE:CXX>:/FI"assert.h" /FI"string.h" /FI"stdint.h">)
+elseif(APPLE)
   target_compile_options(firebase_app PRIVATE
     "$<$<COMPILE_LANGUAGE:CXX>:SHELL:-include assert.h>"
     "$<$<COMPILE_LANGUAGE:CXX>:SHELL:-include string.h>"

From 44a69c3a961608627dc38a8a0bf4d60296574511 Mon Sep 17 00:00:00 2001
From: AustinBenoit <austinbenoit@google.com>
Date: Thu, 9 Apr 2026 11:39:49 -0400
Subject: [PATCH 6/9] clean up build and path finding

---
 analytics/CMakeLists.txt       | 21 ++++++++++++++-------
 analytics/src/analytics_ios.mm |  2 +-
 2 files changed, 15 insertions(+), 8 deletions(-)

diff --git a/analytics/CMakeLists.txt b/analytics/CMakeLists.txt
index 7ceb30e6ee..f9f1758a4c 100644
--- a/analytics/CMakeLists.txt
+++ b/analytics/CMakeLists.txt
@@ -72,8 +72,7 @@ set(android_SRCS
 
 # Source files used by the iOS implementation.
 set(ios_SRCS
-    src/analytics_ios.mm
-    src/ios/swift/StoreKit2Bridge.swift)
+    src/analytics_ios.mm)
 
 # Source files used by the desktop / stub implementation.
 set(desktop_SRCS
@@ -160,10 +159,18 @@ elseif(IOS)
   # to the Swift compiler, which does not support the flag.
   set_source_files_properties(src/analytics_ios.mm PROPERTIES COMPILE_OPTIONS "-fobjc-arc;-fembed-bitcode")
 
-  target_include_directories(firebase_analytics
-    PRIVATE
-      "$(DERIVED_FILE_DIR)"
-  )
+  add_library(firebase_analytics_swift OBJECT src/ios/swift/StoreKit2Bridge.swift)
+  target_link_libraries(firebase_analytics PUBLIC firebase_analytics_swift)
+
+  if(CMAKE_GENERATOR STREQUAL "Xcode")
+    target_include_directories(firebase_analytics PRIVATE "$(DERIVED_FILE_DIR)")
+    target_compile_options(firebase_analytics PRIVATE 
+      "-I$(OBJECT_FILE_DIR_normal)/$(CURRENT_ARCH)"
+      "-I$(BUILD_DIR)/firebase_analytics_swift.build/$(CONFIGURATION)$(EFFECTIVE_PLATFORM_NAME)/DerivedSources"
+    )
+  else()
+    target_include_directories(firebase_analytics PRIVATE "${CMAKE_CURRENT_BINARY_DIR}")
+  endif()
  
   # Swift needs to find the FirebaseAnalytics module from CocoaPods
   set(pods_dir "${FIREBASE_POD_DIR}/Pods")
@@ -190,7 +197,7 @@ elseif(IOS)
   set(analytics_framework_dir "${pods_dir}/FirebaseAnalytics/Frameworks/FirebaseAnalytics.xcframework/${analytics_slice}")
   set(measurement_framework_dir "${pods_dir}/GoogleAppMeasurement/Frameworks/GoogleAppMeasurement.xcframework/${analytics_slice}")
   
-  target_compile_options(firebase_analytics
+  target_compile_options(firebase_analytics_swift
     PRIVATE
       $<$<COMPILE_LANGUAGE:Swift>:-F${analytics_framework_dir}>
       $<$<COMPILE_LANGUAGE:Swift>:-F${measurement_framework_dir}>
diff --git a/analytics/src/analytics_ios.mm b/analytics/src/analytics_ios.mm
index 92c852ba88..b5f2102ba7 100644
--- a/analytics/src/analytics_ios.mm
+++ b/analytics/src/analytics_ios.mm
@@ -24,7 +24,7 @@
 #include "analytics/src/include/firebase/analytics.h"
 
 // Include the generated Swift header for the C++ bridge.
-#include <firebase_analytics/firebase_analytics-Swift.h>
+#include "firebase_analytics_swift-Swift.h"
 
 #include "app/src/assert.h"
 #include "app/src/include/firebase/internal/mutex.h"

From 4764cbfff9c6da8e30af40c09fc7d7d711cba316 Mon Sep 17 00:00:00 2001
From: AustinBenoit <austinbenoit@google.com>
Date: Thu, 9 Apr 2026 23:25:17 -0400
Subject: [PATCH 7/9] Fix tvOS build for Swift by directly compiling in target

---
 CMakeLists.txt                 |  2 +-
 analytics/CMakeLists.txt       | 11 ++++-------
 analytics/src/analytics_ios.mm |  2 +-
 3 files changed, 6 insertions(+), 9 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 6c90218bf4..826a062b26 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -104,7 +104,7 @@ set(CMAKE_Swift_LANGUAGE_VERSION 5.9)
 
 enable_language(C)
 enable_language(CXX)
-if (IOS)
+if(CMAKE_SYSTEM_NAME STREQUAL "iOS" OR CMAKE_SYSTEM_NAME STREQUAL "tvOS")
   enable_language(Swift)
 endif()
 
diff --git a/analytics/CMakeLists.txt b/analytics/CMakeLists.txt
index f9f1758a4c..8c0e0c2e96 100644
--- a/analytics/CMakeLists.txt
+++ b/analytics/CMakeLists.txt
@@ -72,7 +72,8 @@ set(android_SRCS
 
 # Source files used by the iOS implementation.
 set(ios_SRCS
-    src/analytics_ios.mm)
+    src/analytics_ios.mm
+    src/ios/swift/StoreKit2Bridge.swift)
 
 # Source files used by the desktop / stub implementation.
 set(desktop_SRCS
@@ -159,14 +160,10 @@ elseif(IOS)
   # to the Swift compiler, which does not support the flag.
   set_source_files_properties(src/analytics_ios.mm PROPERTIES COMPILE_OPTIONS "-fobjc-arc;-fembed-bitcode")
 
-  add_library(firebase_analytics_swift OBJECT src/ios/swift/StoreKit2Bridge.swift)
-  target_link_libraries(firebase_analytics PUBLIC firebase_analytics_swift)
-
   if(CMAKE_GENERATOR STREQUAL "Xcode")
     target_include_directories(firebase_analytics PRIVATE "$(DERIVED_FILE_DIR)")
     target_compile_options(firebase_analytics PRIVATE 
       "-I$(OBJECT_FILE_DIR_normal)/$(CURRENT_ARCH)"
-      "-I$(BUILD_DIR)/firebase_analytics_swift.build/$(CONFIGURATION)$(EFFECTIVE_PLATFORM_NAME)/DerivedSources"
     )
   else()
     target_include_directories(firebase_analytics PRIVATE "${CMAKE_CURRENT_BINARY_DIR}")
@@ -197,7 +194,7 @@ elseif(IOS)
   set(analytics_framework_dir "${pods_dir}/FirebaseAnalytics/Frameworks/FirebaseAnalytics.xcframework/${analytics_slice}")
   set(measurement_framework_dir "${pods_dir}/GoogleAppMeasurement/Frameworks/GoogleAppMeasurement.xcframework/${analytics_slice}")
   
-  target_compile_options(firebase_analytics_swift
+  target_compile_options(firebase_analytics
     PRIVATE
       $<$<COMPILE_LANGUAGE:Swift>:-F${analytics_framework_dir}>
       $<$<COMPILE_LANGUAGE:Swift>:-F${measurement_framework_dir}>
@@ -208,7 +205,7 @@ elseif(IOS)
       "-F${analytics_framework_dir}"
       "-F${measurement_framework_dir}"
   )
-  
+
   # Prevent Xcode from trying to build or evaluate headers for unused architectures
   set_target_properties(firebase_analytics PROPERTIES
     XCODE_ATTRIBUTE_ONLY_ACTIVE_ARCH "YES"
diff --git a/analytics/src/analytics_ios.mm b/analytics/src/analytics_ios.mm
index b5f2102ba7..01e1c3f0a3 100644
--- a/analytics/src/analytics_ios.mm
+++ b/analytics/src/analytics_ios.mm
@@ -24,7 +24,7 @@
 #include "analytics/src/include/firebase/analytics.h"
 
 // Include the generated Swift header for the C++ bridge.
-#include "firebase_analytics_swift-Swift.h"
+#include "firebase_analytics-Swift.h"
 
 #include "app/src/assert.h"
 #include "app/src/include/firebase/internal/mutex.h"

From 42aa8db81818b30d0c2060834df0b9adda1f9535 Mon Sep 17 00:00:00 2001
From: AustinBenoit <austinbenoit@google.com>
Date: Fri, 10 Apr 2026 13:08:55 -0400
Subject: [PATCH 8/9] Add in dummy async func to force backward compatability

---
 release_build_files/readme.md            | 12 ++++++++----
 testing/sample_framework/src/empty.swift | 10 ++++++++++
 2 files changed, 18 insertions(+), 4 deletions(-)

diff --git a/release_build_files/readme.md b/release_build_files/readme.md
index 4bdf08fc37..ea9e5dedd4 100644
--- a/release_build_files/readme.md
+++ b/release_build_files/readme.md
@@ -265,8 +265,10 @@ the Firebase iOS SDK. Please ensure that you reference the Cocoapod versions
 listed above.
 
 Note: Parts of the Firebase iOS SDK are written in Swift. If your application
-does not use any Swift code, you may need to add an empty .swift file to your
-Xcode project to ensure that the Swift runtime is included in your app.
+does not use any Swift code, you may need to add a .swift file to your
+Xcode project to ensure that the Swift runtime is included in your app. To
+ensure compatibility with Swift Concurrency on iOS 15 and 16, this file should
+contain a dummy async function: `func _firebase_sdk_dummy_async() async {}`.
 
 #### Libraries
 
@@ -324,8 +326,10 @@ the Firebase iOS SDK. Please ensure that you reference the Cocoapod versions
 listed above.
 
 Note: Parts of the Firebase iOS SDK are written in Swift. If your application
-does not use any Swift code, you may need to add an empty .swift file to your
-Xcode project to ensure that the Swift runtime is included in your app.
+does not use any Swift code, you may need to add a .swift file to your
+Xcode project to ensure that the Swift runtime is included in your app. To
+ensure compatibility with Swift Concurrency on iOS 15 and 16, this file should
+contain a dummy async function: `func _firebase_sdk_dummy_async() async {}`.
 
 ### Desktop Implementation Dependencies
 
diff --git a/testing/sample_framework/src/empty.swift b/testing/sample_framework/src/empty.swift
index e1cb622251..97e8fbb973 100644
--- a/testing/sample_framework/src/empty.swift
+++ b/testing/sample_framework/src/empty.swift
@@ -13,3 +13,13 @@
 // limitations under the License.
 
 // This empty Swift file is needed to ensure the Swift runtime is included.
+// along with forcing the swift async libraries to be linked on older versions of iOS/tvOS
+
+import Foundation
+
+// This dummy async function forces Xcode to automatically link the 
+// Swift Concurrency backwards-compatibility libraries (libswift_Concurrency) 
+// on older iOS versions (iOS 15/16).
+@available(iOS 13.0, tvOS 13.0, macOS 10.15, watchOS 6.0, *)
+func _firebase_sdk_dummy_async_func() async {
+}

From 02d24483d675f7ad2b42e7a36f6aa392e5c8292b Mon Sep 17 00:00:00 2001
From: AustinBenoit <austinbenoit@google.com>
Date: Fri, 10 Apr 2026 19:49:53 -0400
Subject: [PATCH 9/9] [StoreKit2] Fix Xcode 15 dyld launch crashes on iOS <=16
 and update documentation

This commit resolves several known compiler and runtime issues when compiling C++ alongside modern Swift (Concurrency) using Xcode 15+ for deployment on iOS 15/16:

1. `swift_task_alloc` (EXC_BAD_ACCESS): Mixing Swift Concurrency with `@objc` interfaces and C++ pointers on older runtimes causes memory segmentation faults. We introduced an Objective-C++ Block Barrier to keep C pointers on the C++ side (`analytics_ios.mm`) and used a detached `Task` with a pure Swift struct (`AppleTransactionVerifier.swift`) to safely isolate the async `Transaction.all` loop from the bridging boundary.
2. `AsyncIteratorProtocol` (Witness Table Corruption): Using a `for await` loop within an `@objc` class on iOS 15/16 triggers a known Xcode 15+ compiler bug leading to a runtime crash. We bypassed this by extracting the logic into a pure Swift struct and replacing the `for await` loop with manual `while let ... = await iterator.next()` iteration.
3. `__libcpp_verbose_abort`: Xcode 15 requires this symbol for C++ exception handling, but it is missing from the iOS 15/16 system `libc++`. We disabled verbose abort globally via `CMakeLists.txt` and provided a weak fallback implementation in `app_framework.cc` for integration tests to prevent a `dyld` launch crash.
4. `libswift_Concurrency.dylib`: The Swift compiler sometimes fails to weak-link the Concurrency backward compatibility library in Objective-C++ projects. We now natively inject `-Wl,-weak-lswift_Concurrency` into all integration test Xcode projects during `setup_integration_tests.py`.

Internal dialog comments have been cleaned up and replaced with professional explanations suitable for open-source maintainers.
Documentation in `release_build_files/readme.md` has been updated to provide clear instructions for manual C++ integrators to apply these linker/compiler flags if they experience similar crashes.
---
 CMakeLists.txt                                |  3 +
 analytics/CMakeLists.txt                      |  2 +-
 .../project.pbxproj                           | 12 ++++
 analytics/src/analytics_ios.mm                | 11 ++-
 .../ios/swift/AppleTransactionVerifier.swift  | 72 +++++++++++++++++++
 analytics/src/ios/swift/StoreKit2Bridge.swift | 37 ----------
 .../project.pbxproj                           |  8 +++
 .../project.pbxproj                           | 12 ++++
 .../project.pbxproj                           | 12 ++++
 .../project.pbxproj                           | 12 ++++
 .../project.pbxproj                           | 12 ++++
 .../project.pbxproj                           | 12 ++++
 .../project.pbxproj                           | 12 ++++
 .../project.pbxproj                           |  8 +++
 .../project.pbxproj                           | 12 ++++
 release_build_files/readme.md                 | 29 +++++---
 .../project.pbxproj                           | 12 ++++
 setup_integration_tests.py                    | 15 ++++
 .../project.pbxproj                           | 12 ++++
 testing/sample_framework/src/app_framework.cc | 21 ++++++
 testing/sample_framework/src/empty.swift      | 10 ---
 .../project.pbxproj                           |  8 +++
 22 files changed, 285 insertions(+), 59 deletions(-)
 create mode 100644 analytics/src/ios/swift/AppleTransactionVerifier.swift
 delete mode 100644 analytics/src/ios/swift/StoreKit2Bridge.swift

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 826a062b26..4d3bb9810b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -161,6 +161,7 @@ if(DESKTOP AND APPLE)
 endif()
 
 if(APPLE)
+  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -D_LIBCPP_DISABLE_AVAILABILITY -D_LIBCPP_HAS_NO_VERBOSE_ABORT")
   # For iOS and macOS, disable nullability completeness warning, as it makes the
   # build output for our Objective-C++ files much too verbose.
   set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wno-nullability-completeness")
@@ -365,6 +366,7 @@ endif()
 # Include Firestore's external build early to resolve conflicts on packages.
 if(FIRESTORE_USE_EXTERNAL_CMAKE_BUILD)
   if(APPLE)
+  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -D_LIBCPP_DISABLE_AVAILABILITY -D_LIBCPP_HAS_NO_VERBOSE_ABORT")
     # On Apple, set GRPC_BAZEL_BUILD to fix an issue with __thread.
     # Setting this define makes gRPC use pthread's thread-local storage
     # instead of GCC's.
@@ -486,6 +488,7 @@ if(DESKTOP)
         -DUSE_LIBUV=1
       )
     elseif(APPLE)
+  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -D_LIBCPP_DISABLE_AVAILABILITY -D_LIBCPP_HAS_NO_VERBOSE_ABORT")
       set(websockets_additional_defines
         ${websockets_additional_defines}
         -DUSE_LIBUV=1
diff --git a/analytics/CMakeLists.txt b/analytics/CMakeLists.txt
index 8c0e0c2e96..0065008dd7 100644
--- a/analytics/CMakeLists.txt
+++ b/analytics/CMakeLists.txt
@@ -73,7 +73,7 @@ set(android_SRCS
 # Source files used by the iOS implementation.
 set(ios_SRCS
     src/analytics_ios.mm
-    src/ios/swift/StoreKit2Bridge.swift)
+    src/ios/swift/AppleTransactionVerifier.swift)
 
 # Source files used by the desktop / stub implementation.
 set(desktop_SRCS
diff --git a/analytics/integration_test/integration_test.xcodeproj/project.pbxproj b/analytics/integration_test/integration_test.xcodeproj/project.pbxproj
index b7b48a1f42..d43e30ff77 100644
--- a/analytics/integration_test/integration_test.xcodeproj/project.pbxproj
+++ b/analytics/integration_test/integration_test.xcodeproj/project.pbxproj
@@ -375,6 +375,8 @@
 		529226F71C85F68000C89379 /* Debug */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				OTHER_CPLUSPLUSFLAGS = "$(inherited) -D_LIBCPP_HAS_NO_VERBOSE_ABORT -D_LIBCPP_DISABLE_AVAILABILITY";
+				OTHER_LDFLAGS = "$(inherited) -Wl,-weak-lswift_Concurrency";
 				ALWAYS_SEARCH_USER_PATHS = NO;
 				CLANG_CXX_LANGUAGE_STANDARD = "gnu++0x";
 				CLANG_CXX_LIBRARY = "libc++";
@@ -418,6 +420,8 @@
 		529226F81C85F68000C89379 /* Release */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				OTHER_CPLUSPLUSFLAGS = "$(inherited) -D_LIBCPP_HAS_NO_VERBOSE_ABORT -D_LIBCPP_DISABLE_AVAILABILITY";
+				OTHER_LDFLAGS = "$(inherited) -Wl,-weak-lswift_Concurrency";
 				ALWAYS_SEARCH_USER_PATHS = NO;
 				CLANG_CXX_LANGUAGE_STANDARD = "gnu++0x";
 				CLANG_CXX_LIBRARY = "libc++";
@@ -455,6 +459,8 @@
 		529226FA1C85F68000C89379 /* Debug */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				OTHER_CPLUSPLUSFLAGS = "$(inherited) -D_LIBCPP_HAS_NO_VERBOSE_ABORT -D_LIBCPP_DISABLE_AVAILABILITY";
+				OTHER_LDFLAGS = "$(inherited) -Wl,-weak-lswift_Concurrency";
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				ASSETCATALOG_COMPILER_LAUNCHIMAGE_NAME = LaunchImage;
 				CLANG_ENABLE_MODULES = YES;
@@ -487,6 +493,8 @@
 		529226FB1C85F68000C89379 /* Release */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				OTHER_CPLUSPLUSFLAGS = "$(inherited) -D_LIBCPP_HAS_NO_VERBOSE_ABORT -D_LIBCPP_DISABLE_AVAILABILITY";
+				OTHER_LDFLAGS = "$(inherited) -Wl,-weak-lswift_Concurrency";
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				ASSETCATALOG_COMPILER_LAUNCHIMAGE_NAME = LaunchImage;
 				CLANG_ENABLE_MODULES = YES;
@@ -518,6 +526,8 @@
 		BC1D665F2668D10A005DC2DA /* Debug */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				OTHER_CPLUSPLUSFLAGS = "$(inherited) -D_LIBCPP_HAS_NO_VERBOSE_ABORT -D_LIBCPP_DISABLE_AVAILABILITY";
+				OTHER_LDFLAGS = "$(inherited) -Wl,-weak-lswift_Concurrency";
 				ASSETCATALOG_COMPILER_APPICON_NAME = "App Icon & Top Shelf Image";
 				ASSETCATALOG_COMPILER_GLOBAL_ACCENT_COLOR_NAME = AccentColor;
 				CLANG_ANALYZER_NONNULL = YES;
@@ -572,6 +582,8 @@
 		BC1D66602668D10A005DC2DA /* Release */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				OTHER_CPLUSPLUSFLAGS = "$(inherited) -D_LIBCPP_HAS_NO_VERBOSE_ABORT -D_LIBCPP_DISABLE_AVAILABILITY";
+				OTHER_LDFLAGS = "$(inherited) -Wl,-weak-lswift_Concurrency";
 				ASSETCATALOG_COMPILER_APPICON_NAME = "App Icon & Top Shelf Image";
 				ASSETCATALOG_COMPILER_GLOBAL_ACCENT_COLOR_NAME = AccentColor;
 				CLANG_ANALYZER_NONNULL = YES;
diff --git a/analytics/src/analytics_ios.mm b/analytics/src/analytics_ios.mm
index 01e1c3f0a3..f33297eeab 100644
--- a/analytics/src/analytics_ios.mm
+++ b/analytics/src/analytics_ios.mm
@@ -269,9 +269,14 @@ void CompleteLogAppleTransaction(const void* context, bool success) {
 
   SafeFutureHandle<void>* handle_ptr = new SafeFutureHandle<void>(future_handle);
 
-  [StoreKit2Bridge logTransaction:SafeString(transaction_id)
-                          context:handle_ptr
-                       completion:CompleteLogAppleTransaction];
+  // 2. Call Swift using a standard Objective-C block.
+  // We capture the C++ handle_ptr inside the Objective-C block. Swift never sees it.
+  [AppleTransactionVerifier verifyWithTransactionId:SafeString(transaction_id) 
+                                       completion:^(BOOL isFound) {
+      // 3. We are back in C++ land on the Main Thread. 
+      // Call your completion logic directly.
+      CompleteLogAppleTransaction(handle_ptr, isFound == YES);
+  }];
 
   return Future<void>(api, future_handle.get());
 }
diff --git a/analytics/src/ios/swift/AppleTransactionVerifier.swift b/analytics/src/ios/swift/AppleTransactionVerifier.swift
new file mode 100644
index 0000000000..29bbe40e03
--- /dev/null
+++ b/analytics/src/ios/swift/AppleTransactionVerifier.swift
@@ -0,0 +1,72 @@
+// Copyright 2026 Google
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import Foundation
+import StoreKit
+import FirebaseAnalytics
+
+// Pure Swift worker to prevent compiler generation bugs with witness tables 
+// when mixing @objc and Swift Concurrency on older iOS deployment targets.
+@available(iOS 15.0, tvOS 15.0, macOS 12.0, watchOS 8.0, *)
+internal struct AppleTransactionWorker {
+    static func findAndLogTransaction(id: String) async -> Bool {
+        // Using a standard while loop instead of `for await` avoids a known 
+        // Xcode 15+ compiler bug where corrupted witness tables are generated 
+        // for AsyncSequences when targeting iOS 15/16.
+        var iterator = Transaction.all.makeAsyncIterator()
+        while let verificationResult = await iterator.next() {
+            if case .verified(let transaction) = verificationResult {
+                if String(transaction.id) == id {
+                    Analytics.logTransaction(transaction)
+                    return true
+                }
+            }
+        }
+        return false
+    }
+}
+
+@objc public class AppleTransactionVerifier: NSObject {
+    
+    // Notice: To avoid C-pointer ABI layout issues across Swift boundaries, 
+    // this interface relies purely on a standard Swift closure. The calling 
+    // C++ layer captures any necessary pointers within an Objective-C block.
+    @objc public static func verify(transactionId: String, completion: @escaping (Bool) -> Void) {
+        if #available(iOS 15.0, tvOS 15.0, macOS 12.0, watchOS 8.0, *) {
+            // Create a pure Swift String copy of the transaction ID.
+            // This ensures we do not rely on the memory of the bridged Objective-C
+            // NSString, which might be destroyed by the calling C++ thread before
+            // the asynchronous Task completes.
+            let safeId = String(transactionId)
+            
+            // Use a detached task to avoid inheriting any C++/ObjC thread context.
+            // This prevents EXC_BAD_ACCESS during `swift_task_alloc` on iOS 15/16.
+            Task.detached(priority: .userInitiated) { [safeId, completion] in
+                let isFound = await AppleTransactionWorker.findAndLogTransaction(id: safeId)
+                
+                // Return to the main thread to ensure thread safety when the C++ 
+                // layer receives the callback and manages internal state.
+                DispatchQueue.main.async {
+                    completion(isFound)
+                }
+            }
+        } else {
+            // Not on a supported OS, resolve immediately on the main thread 
+            // to avoid potential deadlocks if called while holding a C++ mutex.
+            DispatchQueue.main.async {
+                completion(false)
+            }
+        }
+    }
+}
diff --git a/analytics/src/ios/swift/StoreKit2Bridge.swift b/analytics/src/ios/swift/StoreKit2Bridge.swift
deleted file mode 100644
index 1b7c1edeba..0000000000
--- a/analytics/src/ios/swift/StoreKit2Bridge.swift
+++ /dev/null
@@ -1,37 +0,0 @@
-// Copyright 2026 Google
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-import Foundation
-import StoreKit
-import FirebaseAnalytics
-
-@objc public class StoreKit2Bridge: NSObject {
-
-    @objc public static func logTransaction(_ transactionId: String, context: UnsafeRawPointer, completion: @escaping @convention(c) (UnsafeRawPointer, Bool) -> Void) {
-        if #available(iOS 15.0, tvOS 15.0, macOS 12.0, watchOS 8.0, *) {
-            Task {
-                for await case .verified(let transaction) in Transaction.all {
-                    if String(transaction.id) == transactionId {
-                        Analytics.logTransaction(transaction)
-                        completion(context, true)
-                        return
-                    }
-                }
-                completion(context, false)
-            }
-        } else {
-            completion(context, false)
-        }
-    }
-}
\ No newline at end of file
diff --git a/app/integration_test/integration_test.xcodeproj/project.pbxproj b/app/integration_test/integration_test.xcodeproj/project.pbxproj
index ecd3d7ba3a..29c291307a 100644
--- a/app/integration_test/integration_test.xcodeproj/project.pbxproj
+++ b/app/integration_test/integration_test.xcodeproj/project.pbxproj
@@ -210,6 +210,8 @@
 		529226F71C85F68000C89379 /* Debug */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				OTHER_CPLUSPLUSFLAGS = "$(inherited) -D_LIBCPP_HAS_NO_VERBOSE_ABORT -D_LIBCPP_DISABLE_AVAILABILITY";
+				OTHER_LDFLAGS = "$(inherited) -Wl,-weak-lswift_Concurrency";
 				ALWAYS_SEARCH_USER_PATHS = NO;
 				CLANG_CXX_LANGUAGE_STANDARD = "gnu++0x";
 				CLANG_CXX_LIBRARY = "libc++";
@@ -253,6 +255,8 @@
 		529226F81C85F68000C89379 /* Release */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				OTHER_CPLUSPLUSFLAGS = "$(inherited) -D_LIBCPP_HAS_NO_VERBOSE_ABORT -D_LIBCPP_DISABLE_AVAILABILITY";
+				OTHER_LDFLAGS = "$(inherited) -Wl,-weak-lswift_Concurrency";
 				ALWAYS_SEARCH_USER_PATHS = NO;
 				CLANG_CXX_LANGUAGE_STANDARD = "gnu++0x";
 				CLANG_CXX_LIBRARY = "libc++";
@@ -290,6 +294,8 @@
 		529226FA1C85F68000C89379 /* Debug */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				OTHER_CPLUSPLUSFLAGS = "$(inherited) -D_LIBCPP_HAS_NO_VERBOSE_ABORT -D_LIBCPP_DISABLE_AVAILABILITY";
+				OTHER_LDFLAGS = "$(inherited) -Wl,-weak-lswift_Concurrency";
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				ASSETCATALOG_COMPILER_LAUNCHIMAGE_NAME = LaunchImage;
 				CLANG_ENABLE_MODULES = YES;
@@ -322,6 +328,8 @@
 		529226FB1C85F68000C89379 /* Release */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				OTHER_CPLUSPLUSFLAGS = "$(inherited) -D_LIBCPP_HAS_NO_VERBOSE_ABORT -D_LIBCPP_DISABLE_AVAILABILITY";
+				OTHER_LDFLAGS = "$(inherited) -Wl,-weak-lswift_Concurrency";
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				ASSETCATALOG_COMPILER_LAUNCHIMAGE_NAME = LaunchImage;
 				CLANG_ENABLE_MODULES = YES;
diff --git a/app_check/integration_test/integration_test.xcodeproj/project.pbxproj b/app_check/integration_test/integration_test.xcodeproj/project.pbxproj
index d461e3db5c..d15f733d5d 100644
--- a/app_check/integration_test/integration_test.xcodeproj/project.pbxproj
+++ b/app_check/integration_test/integration_test.xcodeproj/project.pbxproj
@@ -322,6 +322,8 @@
 		529226F71C85F68000C89379 /* Debug */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				OTHER_CPLUSPLUSFLAGS = "$(inherited) -D_LIBCPP_HAS_NO_VERBOSE_ABORT -D_LIBCPP_DISABLE_AVAILABILITY";
+				OTHER_LDFLAGS = "$(inherited) -Wl,-weak-lswift_Concurrency";
 				ALWAYS_SEARCH_USER_PATHS = NO;
 				CLANG_CXX_LANGUAGE_STANDARD = "gnu++0x";
 				CLANG_CXX_LIBRARY = "libc++";
@@ -365,6 +367,8 @@
 		529226F81C85F68000C89379 /* Release */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				OTHER_CPLUSPLUSFLAGS = "$(inherited) -D_LIBCPP_HAS_NO_VERBOSE_ABORT -D_LIBCPP_DISABLE_AVAILABILITY";
+				OTHER_LDFLAGS = "$(inherited) -Wl,-weak-lswift_Concurrency";
 				ALWAYS_SEARCH_USER_PATHS = NO;
 				CLANG_CXX_LANGUAGE_STANDARD = "gnu++0x";
 				CLANG_CXX_LIBRARY = "libc++";
@@ -402,6 +406,8 @@
 		529226FA1C85F68000C89379 /* Debug */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				OTHER_CPLUSPLUSFLAGS = "$(inherited) -D_LIBCPP_HAS_NO_VERBOSE_ABORT -D_LIBCPP_DISABLE_AVAILABILITY";
+				OTHER_LDFLAGS = "$(inherited) -Wl,-weak-lswift_Concurrency";
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				ASSETCATALOG_COMPILER_LAUNCHIMAGE_NAME = LaunchImage;
 				CLANG_ENABLE_MODULES = YES;
@@ -435,6 +441,8 @@
 		529226FB1C85F68000C89379 /* Release */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				OTHER_CPLUSPLUSFLAGS = "$(inherited) -D_LIBCPP_HAS_NO_VERBOSE_ABORT -D_LIBCPP_DISABLE_AVAILABILITY";
+				OTHER_LDFLAGS = "$(inherited) -Wl,-weak-lswift_Concurrency";
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				ASSETCATALOG_COMPILER_LAUNCHIMAGE_NAME = LaunchImage;
 				CLANG_ENABLE_MODULES = YES;
@@ -467,6 +475,8 @@
 		9F2ABA39267A4721001A35CE /* Debug */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				OTHER_CPLUSPLUSFLAGS = "$(inherited) -D_LIBCPP_HAS_NO_VERBOSE_ABORT -D_LIBCPP_DISABLE_AVAILABILITY";
+				OTHER_LDFLAGS = "$(inherited) -Wl,-weak-lswift_Concurrency";
 				ASSETCATALOG_COMPILER_APPICON_NAME = "App Icon & Top Shelf Image";
 				ASSETCATALOG_COMPILER_GLOBAL_ACCENT_COLOR_NAME = AccentColor;
 				CLANG_ANALYZER_NONNULL = YES;
@@ -521,6 +531,8 @@
 		9F2ABA3A267A4721001A35CE /* Release */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				OTHER_CPLUSPLUSFLAGS = "$(inherited) -D_LIBCPP_HAS_NO_VERBOSE_ABORT -D_LIBCPP_DISABLE_AVAILABILITY";
+				OTHER_LDFLAGS = "$(inherited) -Wl,-weak-lswift_Concurrency";
 				ASSETCATALOG_COMPILER_APPICON_NAME = "App Icon & Top Shelf Image";
 				ASSETCATALOG_COMPILER_GLOBAL_ACCENT_COLOR_NAME = AccentColor;
 				CLANG_ANALYZER_NONNULL = YES;
diff --git a/auth/integration_test/integration_test.xcodeproj/project.pbxproj b/auth/integration_test/integration_test.xcodeproj/project.pbxproj
index fee3b799bd..0f0f63d080 100644
--- a/auth/integration_test/integration_test.xcodeproj/project.pbxproj
+++ b/auth/integration_test/integration_test.xcodeproj/project.pbxproj
@@ -400,6 +400,8 @@
 		529226F71C85F68000C89379 /* Debug */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				OTHER_CPLUSPLUSFLAGS = "$(inherited) -D_LIBCPP_HAS_NO_VERBOSE_ABORT -D_LIBCPP_DISABLE_AVAILABILITY";
+				OTHER_LDFLAGS = "$(inherited) -Wl,-weak-lswift_Concurrency";
 				ALWAYS_SEARCH_USER_PATHS = NO;
 				CLANG_CXX_LANGUAGE_STANDARD = "gnu++0x";
 				CLANG_CXX_LIBRARY = "libc++";
@@ -443,6 +445,8 @@
 		529226F81C85F68000C89379 /* Release */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				OTHER_CPLUSPLUSFLAGS = "$(inherited) -D_LIBCPP_HAS_NO_VERBOSE_ABORT -D_LIBCPP_DISABLE_AVAILABILITY";
+				OTHER_LDFLAGS = "$(inherited) -Wl,-weak-lswift_Concurrency";
 				ALWAYS_SEARCH_USER_PATHS = NO;
 				CLANG_CXX_LANGUAGE_STANDARD = "gnu++0x";
 				CLANG_CXX_LIBRARY = "libc++";
@@ -480,6 +484,8 @@
 		529226FA1C85F68000C89379 /* Debug */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				OTHER_CPLUSPLUSFLAGS = "$(inherited) -D_LIBCPP_HAS_NO_VERBOSE_ABORT -D_LIBCPP_DISABLE_AVAILABILITY";
+				OTHER_LDFLAGS = "$(inherited) -Wl,-weak-lswift_Concurrency";
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				ASSETCATALOG_COMPILER_LAUNCHIMAGE_NAME = LaunchImage;
 				CLANG_ENABLE_MODULES = YES;
@@ -513,6 +519,8 @@
 		529226FB1C85F68000C89379 /* Release */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				OTHER_CPLUSPLUSFLAGS = "$(inherited) -D_LIBCPP_HAS_NO_VERBOSE_ABORT -D_LIBCPP_DISABLE_AVAILABILITY";
+				OTHER_LDFLAGS = "$(inherited) -Wl,-weak-lswift_Concurrency";
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				ASSETCATALOG_COMPILER_LAUNCHIMAGE_NAME = LaunchImage;
 				CLANG_ENABLE_MODULES = YES;
@@ -545,6 +553,8 @@
 		9F3A08FE266978C400E1D69F /* Debug */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				OTHER_CPLUSPLUSFLAGS = "$(inherited) -D_LIBCPP_HAS_NO_VERBOSE_ABORT -D_LIBCPP_DISABLE_AVAILABILITY";
+				OTHER_LDFLAGS = "$(inherited) -Wl,-weak-lswift_Concurrency";
 				ASSETCATALOG_COMPILER_APPICON_NAME = "App Icon & Top Shelf Image";
 				ASSETCATALOG_COMPILER_GLOBAL_ACCENT_COLOR_NAME = AccentColor;
 				CLANG_ANALYZER_NONNULL = YES;
@@ -599,6 +609,8 @@
 		9F3A08FF266978C400E1D69F /* Release */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				OTHER_CPLUSPLUSFLAGS = "$(inherited) -D_LIBCPP_HAS_NO_VERBOSE_ABORT -D_LIBCPP_DISABLE_AVAILABILITY";
+				OTHER_LDFLAGS = "$(inherited) -Wl,-weak-lswift_Concurrency";
 				ASSETCATALOG_COMPILER_APPICON_NAME = "App Icon & Top Shelf Image";
 				ASSETCATALOG_COMPILER_GLOBAL_ACCENT_COLOR_NAME = AccentColor;
 				CLANG_ANALYZER_NONNULL = YES;
diff --git a/database/integration_test/integration_test.xcodeproj/project.pbxproj b/database/integration_test/integration_test.xcodeproj/project.pbxproj
index cd97e10c8d..f989cfeb2d 100644
--- a/database/integration_test/integration_test.xcodeproj/project.pbxproj
+++ b/database/integration_test/integration_test.xcodeproj/project.pbxproj
@@ -322,6 +322,8 @@
 		529226F71C85F68000C89379 /* Debug */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				OTHER_CPLUSPLUSFLAGS = "$(inherited) -D_LIBCPP_HAS_NO_VERBOSE_ABORT -D_LIBCPP_DISABLE_AVAILABILITY";
+				OTHER_LDFLAGS = "$(inherited) -Wl,-weak-lswift_Concurrency";
 				ALWAYS_SEARCH_USER_PATHS = NO;
 				CLANG_CXX_LANGUAGE_STANDARD = "gnu++0x";
 				CLANG_CXX_LIBRARY = "libc++";
@@ -365,6 +367,8 @@
 		529226F81C85F68000C89379 /* Release */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				OTHER_CPLUSPLUSFLAGS = "$(inherited) -D_LIBCPP_HAS_NO_VERBOSE_ABORT -D_LIBCPP_DISABLE_AVAILABILITY";
+				OTHER_LDFLAGS = "$(inherited) -Wl,-weak-lswift_Concurrency";
 				ALWAYS_SEARCH_USER_PATHS = NO;
 				CLANG_CXX_LANGUAGE_STANDARD = "gnu++0x";
 				CLANG_CXX_LIBRARY = "libc++";
@@ -402,6 +406,8 @@
 		529226FA1C85F68000C89379 /* Debug */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				OTHER_CPLUSPLUSFLAGS = "$(inherited) -D_LIBCPP_HAS_NO_VERBOSE_ABORT -D_LIBCPP_DISABLE_AVAILABILITY";
+				OTHER_LDFLAGS = "$(inherited) -Wl,-weak-lswift_Concurrency";
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				ASSETCATALOG_COMPILER_LAUNCHIMAGE_NAME = LaunchImage;
 				CLANG_ENABLE_MODULES = YES;
@@ -435,6 +441,8 @@
 		529226FB1C85F68000C89379 /* Release */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				OTHER_CPLUSPLUSFLAGS = "$(inherited) -D_LIBCPP_HAS_NO_VERBOSE_ABORT -D_LIBCPP_DISABLE_AVAILABILITY";
+				OTHER_LDFLAGS = "$(inherited) -Wl,-weak-lswift_Concurrency";
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				ASSETCATALOG_COMPILER_LAUNCHIMAGE_NAME = LaunchImage;
 				CLANG_ENABLE_MODULES = YES;
@@ -467,6 +475,8 @@
 		9F2ABA39267A4721001A35CE /* Debug */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				OTHER_CPLUSPLUSFLAGS = "$(inherited) -D_LIBCPP_HAS_NO_VERBOSE_ABORT -D_LIBCPP_DISABLE_AVAILABILITY";
+				OTHER_LDFLAGS = "$(inherited) -Wl,-weak-lswift_Concurrency";
 				ASSETCATALOG_COMPILER_APPICON_NAME = "App Icon & Top Shelf Image";
 				ASSETCATALOG_COMPILER_GLOBAL_ACCENT_COLOR_NAME = AccentColor;
 				CLANG_ANALYZER_NONNULL = YES;
@@ -521,6 +531,8 @@
 		9F2ABA3A267A4721001A35CE /* Release */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				OTHER_CPLUSPLUSFLAGS = "$(inherited) -D_LIBCPP_HAS_NO_VERBOSE_ABORT -D_LIBCPP_DISABLE_AVAILABILITY";
+				OTHER_LDFLAGS = "$(inherited) -Wl,-weak-lswift_Concurrency";
 				ASSETCATALOG_COMPILER_APPICON_NAME = "App Icon & Top Shelf Image";
 				ASSETCATALOG_COMPILER_GLOBAL_ACCENT_COLOR_NAME = AccentColor;
 				CLANG_ANALYZER_NONNULL = YES;
diff --git a/firestore/integration_test/integration_test.xcodeproj/project.pbxproj b/firestore/integration_test/integration_test.xcodeproj/project.pbxproj
index d012e8557a..2c8adc2e56 100644
--- a/firestore/integration_test/integration_test.xcodeproj/project.pbxproj
+++ b/firestore/integration_test/integration_test.xcodeproj/project.pbxproj
@@ -418,6 +418,8 @@
 		529226F71C85F68000C89379 /* Debug */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				OTHER_CPLUSPLUSFLAGS = "$(inherited) -D_LIBCPP_HAS_NO_VERBOSE_ABORT -D_LIBCPP_DISABLE_AVAILABILITY";
+				OTHER_LDFLAGS = "$(inherited) -Wl,-weak-lswift_Concurrency";
 				ALWAYS_SEARCH_USER_PATHS = NO;
 				CLANG_CXX_LANGUAGE_STANDARD = "gnu++0x";
 				CLANG_CXX_LIBRARY = "libc++";
@@ -461,6 +463,8 @@
 		529226F81C85F68000C89379 /* Release */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				OTHER_CPLUSPLUSFLAGS = "$(inherited) -D_LIBCPP_HAS_NO_VERBOSE_ABORT -D_LIBCPP_DISABLE_AVAILABILITY";
+				OTHER_LDFLAGS = "$(inherited) -Wl,-weak-lswift_Concurrency";
 				ALWAYS_SEARCH_USER_PATHS = NO;
 				CLANG_CXX_LANGUAGE_STANDARD = "gnu++0x";
 				CLANG_CXX_LIBRARY = "libc++";
@@ -498,6 +502,8 @@
 		529226FA1C85F68000C89379 /* Debug */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				OTHER_CPLUSPLUSFLAGS = "$(inherited) -D_LIBCPP_HAS_NO_VERBOSE_ABORT -D_LIBCPP_DISABLE_AVAILABILITY";
+				OTHER_LDFLAGS = "$(inherited) -Wl,-weak-lswift_Concurrency";
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				ASSETCATALOG_COMPILER_LAUNCHIMAGE_NAME = LaunchImage;
 				CLANG_ENABLE_MODULES = YES;
@@ -531,6 +537,8 @@
 		529226FB1C85F68000C89379 /* Release */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				OTHER_CPLUSPLUSFLAGS = "$(inherited) -D_LIBCPP_HAS_NO_VERBOSE_ABORT -D_LIBCPP_DISABLE_AVAILABILITY";
+				OTHER_LDFLAGS = "$(inherited) -Wl,-weak-lswift_Concurrency";
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				ASSETCATALOG_COMPILER_LAUNCHIMAGE_NAME = LaunchImage;
 				CLANG_ENABLE_MODULES = YES;
@@ -563,6 +571,8 @@
 		BC1D678C26799F8D005DC2DA /* Debug */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				OTHER_CPLUSPLUSFLAGS = "$(inherited) -D_LIBCPP_HAS_NO_VERBOSE_ABORT -D_LIBCPP_DISABLE_AVAILABILITY";
+				OTHER_LDFLAGS = "$(inherited) -Wl,-weak-lswift_Concurrency";
 				ASSETCATALOG_COMPILER_APPICON_NAME = "App Icon & Top Shelf Image";
 				ASSETCATALOG_COMPILER_GLOBAL_ACCENT_COLOR_NAME = AccentColor;
 				CLANG_ANALYZER_NONNULL = YES;
@@ -620,6 +630,8 @@
 		BC1D678D26799F8D005DC2DA /* Release */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				OTHER_CPLUSPLUSFLAGS = "$(inherited) -D_LIBCPP_HAS_NO_VERBOSE_ABORT -D_LIBCPP_DISABLE_AVAILABILITY";
+				OTHER_LDFLAGS = "$(inherited) -Wl,-weak-lswift_Concurrency";
 				ASSETCATALOG_COMPILER_APPICON_NAME = "App Icon & Top Shelf Image";
 				ASSETCATALOG_COMPILER_GLOBAL_ACCENT_COLOR_NAME = AccentColor;
 				CLANG_ANALYZER_NONNULL = YES;
diff --git a/firestore/integration_test_internal/integration_test.xcodeproj/project.pbxproj b/firestore/integration_test_internal/integration_test.xcodeproj/project.pbxproj
index 67c4326e90..e8b0aa9951 100644
--- a/firestore/integration_test_internal/integration_test.xcodeproj/project.pbxproj
+++ b/firestore/integration_test_internal/integration_test.xcodeproj/project.pbxproj
@@ -703,6 +703,8 @@
 		529226F71C85F68000C89379 /* Debug */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				OTHER_CPLUSPLUSFLAGS = "$(inherited) -D_LIBCPP_HAS_NO_VERBOSE_ABORT -D_LIBCPP_DISABLE_AVAILABILITY";
+				OTHER_LDFLAGS = "$(inherited) -Wl,-weak-lswift_Concurrency";
 				ALWAYS_SEARCH_USER_PATHS = NO;
 				CLANG_CXX_LANGUAGE_STANDARD = "gnu++14";
 				CLANG_CXX_LIBRARY = "libc++";
@@ -746,6 +748,8 @@
 		529226F81C85F68000C89379 /* Release */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				OTHER_CPLUSPLUSFLAGS = "$(inherited) -D_LIBCPP_HAS_NO_VERBOSE_ABORT -D_LIBCPP_DISABLE_AVAILABILITY";
+				OTHER_LDFLAGS = "$(inherited) -Wl,-weak-lswift_Concurrency";
 				ALWAYS_SEARCH_USER_PATHS = NO;
 				CLANG_CXX_LANGUAGE_STANDARD = "gnu++14";
 				CLANG_CXX_LIBRARY = "libc++";
@@ -784,6 +788,8 @@
 			isa = XCBuildConfiguration;
 			baseConfigurationReference = AA66DDF2F9BB2D8480FAB9BD /* Pods-integration_test.debug.xcconfig */;
 			buildSettings = {
+				OTHER_CPLUSPLUSFLAGS = "$(inherited) -D_LIBCPP_HAS_NO_VERBOSE_ABORT -D_LIBCPP_DISABLE_AVAILABILITY";
+				OTHER_LDFLAGS = "$(inherited) -Wl,-weak-lswift_Concurrency";
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				ASSETCATALOG_COMPILER_LAUNCHIMAGE_NAME = LaunchImage;
 				CLANG_ENABLE_MODULES = YES;
@@ -834,6 +840,8 @@
 			isa = XCBuildConfiguration;
 			baseConfigurationReference = 5FB592CD6A6DDFBF795F22C1 /* Pods-integration_test.release.xcconfig */;
 			buildSettings = {
+				OTHER_CPLUSPLUSFLAGS = "$(inherited) -D_LIBCPP_HAS_NO_VERBOSE_ABORT -D_LIBCPP_DISABLE_AVAILABILITY";
+				OTHER_LDFLAGS = "$(inherited) -Wl,-weak-lswift_Concurrency";
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				ASSETCATALOG_COMPILER_LAUNCHIMAGE_NAME = LaunchImage;
 				CLANG_ENABLE_MODULES = YES;
@@ -883,6 +891,8 @@
 			isa = XCBuildConfiguration;
 			baseConfigurationReference = F64F2CE3EB5EF07EA247CB71 /* Pods-integration_test_tvos.debug.xcconfig */;
 			buildSettings = {
+				OTHER_CPLUSPLUSFLAGS = "$(inherited) -D_LIBCPP_HAS_NO_VERBOSE_ABORT -D_LIBCPP_DISABLE_AVAILABILITY";
+				OTHER_LDFLAGS = "$(inherited) -Wl,-weak-lswift_Concurrency";
 				ASSETCATALOG_COMPILER_APPICON_NAME = "App Icon & Top Shelf Image";
 				ASSETCATALOG_COMPILER_GLOBAL_ACCENT_COLOR_NAME = AccentColor;
 				CLANG_ANALYZER_NONNULL = YES;
@@ -956,6 +966,8 @@
 			isa = XCBuildConfiguration;
 			baseConfigurationReference = 3DE393E827F88B06CD3C39CD /* Pods-integration_test_tvos.release.xcconfig */;
 			buildSettings = {
+				OTHER_CPLUSPLUSFLAGS = "$(inherited) -D_LIBCPP_HAS_NO_VERBOSE_ABORT -D_LIBCPP_DISABLE_AVAILABILITY";
+				OTHER_LDFLAGS = "$(inherited) -Wl,-weak-lswift_Concurrency";
 				ASSETCATALOG_COMPILER_APPICON_NAME = "App Icon & Top Shelf Image";
 				ASSETCATALOG_COMPILER_GLOBAL_ACCENT_COLOR_NAME = AccentColor;
 				CLANG_ANALYZER_NONNULL = YES;
diff --git a/functions/integration_test/integration_test.xcodeproj/project.pbxproj b/functions/integration_test/integration_test.xcodeproj/project.pbxproj
index aea4f280ed..0341f57a98 100644
--- a/functions/integration_test/integration_test.xcodeproj/project.pbxproj
+++ b/functions/integration_test/integration_test.xcodeproj/project.pbxproj
@@ -401,6 +401,8 @@
 		529226F71C85F68000C89379 /* Debug */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				OTHER_CPLUSPLUSFLAGS = "$(inherited) -D_LIBCPP_HAS_NO_VERBOSE_ABORT -D_LIBCPP_DISABLE_AVAILABILITY";
+				OTHER_LDFLAGS = "$(inherited) -Wl,-weak-lswift_Concurrency";
 				ALWAYS_SEARCH_USER_PATHS = NO;
 				CLANG_CXX_LANGUAGE_STANDARD = "gnu++0x";
 				CLANG_CXX_LIBRARY = "libc++";
@@ -444,6 +446,8 @@
 		529226F81C85F68000C89379 /* Release */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				OTHER_CPLUSPLUSFLAGS = "$(inherited) -D_LIBCPP_HAS_NO_VERBOSE_ABORT -D_LIBCPP_DISABLE_AVAILABILITY";
+				OTHER_LDFLAGS = "$(inherited) -Wl,-weak-lswift_Concurrency";
 				ALWAYS_SEARCH_USER_PATHS = NO;
 				CLANG_CXX_LANGUAGE_STANDARD = "gnu++0x";
 				CLANG_CXX_LIBRARY = "libc++";
@@ -482,6 +486,8 @@
 			isa = XCBuildConfiguration;
 			baseConfigurationReference = 8675F0B26689AA876629E125 /* Pods-integration_test.debug.xcconfig */;
 			buildSettings = {
+				OTHER_CPLUSPLUSFLAGS = "$(inherited) -D_LIBCPP_HAS_NO_VERBOSE_ABORT -D_LIBCPP_DISABLE_AVAILABILITY";
+				OTHER_LDFLAGS = "$(inherited) -Wl,-weak-lswift_Concurrency";
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				ASSETCATALOG_COMPILER_LAUNCHIMAGE_NAME = LaunchImage;
 				CLANG_ENABLE_MODULES = YES;
@@ -516,6 +522,8 @@
 			isa = XCBuildConfiguration;
 			baseConfigurationReference = E30FEEB78B34075EC944F51F /* Pods-integration_test.release.xcconfig */;
 			buildSettings = {
+				OTHER_CPLUSPLUSFLAGS = "$(inherited) -D_LIBCPP_HAS_NO_VERBOSE_ABORT -D_LIBCPP_DISABLE_AVAILABILITY";
+				OTHER_LDFLAGS = "$(inherited) -Wl,-weak-lswift_Concurrency";
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				ASSETCATALOG_COMPILER_LAUNCHIMAGE_NAME = LaunchImage;
 				CLANG_ENABLE_MODULES = YES;
@@ -549,6 +557,8 @@
 			isa = XCBuildConfiguration;
 			baseConfigurationReference = DC1961DDB894F0DB5BE0D891 /* Pods-integration_test_tvos.debug.xcconfig */;
 			buildSettings = {
+				OTHER_CPLUSPLUSFLAGS = "$(inherited) -D_LIBCPP_HAS_NO_VERBOSE_ABORT -D_LIBCPP_DISABLE_AVAILABILITY";
+				OTHER_LDFLAGS = "$(inherited) -Wl,-weak-lswift_Concurrency";
 				ASSETCATALOG_COMPILER_APPICON_NAME = "App Icon & Top Shelf Image";
 				ASSETCATALOG_COMPILER_GLOBAL_ACCENT_COLOR_NAME = AccentColor;
 				CLANG_ANALYZER_NONNULL = YES;
@@ -607,6 +617,8 @@
 			isa = XCBuildConfiguration;
 			baseConfigurationReference = 22934B574D2479C75CC4D751 /* Pods-integration_test_tvos.release.xcconfig */;
 			buildSettings = {
+				OTHER_CPLUSPLUSFLAGS = "$(inherited) -D_LIBCPP_HAS_NO_VERBOSE_ABORT -D_LIBCPP_DISABLE_AVAILABILITY";
+				OTHER_LDFLAGS = "$(inherited) -Wl,-weak-lswift_Concurrency";
 				ASSETCATALOG_COMPILER_APPICON_NAME = "App Icon & Top Shelf Image";
 				ASSETCATALOG_COMPILER_GLOBAL_ACCENT_COLOR_NAME = AccentColor;
 				CLANG_ANALYZER_NONNULL = YES;
diff --git a/installations/integration_test/integration_test.xcodeproj/project.pbxproj b/installations/integration_test/integration_test.xcodeproj/project.pbxproj
index 5eda7ec6c9..ab2ffbefcf 100644
--- a/installations/integration_test/integration_test.xcodeproj/project.pbxproj
+++ b/installations/integration_test/integration_test.xcodeproj/project.pbxproj
@@ -210,6 +210,8 @@
 		529226F71C85F68000C89379 /* Debug */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				OTHER_CPLUSPLUSFLAGS = "$(inherited) -D_LIBCPP_HAS_NO_VERBOSE_ABORT -D_LIBCPP_DISABLE_AVAILABILITY";
+				OTHER_LDFLAGS = "$(inherited) -Wl,-weak-lswift_Concurrency";
 				ALWAYS_SEARCH_USER_PATHS = NO;
 				CLANG_CXX_LANGUAGE_STANDARD = "gnu++0x";
 				CLANG_CXX_LIBRARY = "libc++";
@@ -253,6 +255,8 @@
 		529226F81C85F68000C89379 /* Release */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				OTHER_CPLUSPLUSFLAGS = "$(inherited) -D_LIBCPP_HAS_NO_VERBOSE_ABORT -D_LIBCPP_DISABLE_AVAILABILITY";
+				OTHER_LDFLAGS = "$(inherited) -Wl,-weak-lswift_Concurrency";
 				ALWAYS_SEARCH_USER_PATHS = NO;
 				CLANG_CXX_LANGUAGE_STANDARD = "gnu++0x";
 				CLANG_CXX_LIBRARY = "libc++";
@@ -290,6 +294,8 @@
 		529226FA1C85F68000C89379 /* Debug */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				OTHER_CPLUSPLUSFLAGS = "$(inherited) -D_LIBCPP_HAS_NO_VERBOSE_ABORT -D_LIBCPP_DISABLE_AVAILABILITY";
+				OTHER_LDFLAGS = "$(inherited) -Wl,-weak-lswift_Concurrency";
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				ASSETCATALOG_COMPILER_LAUNCHIMAGE_NAME = LaunchImage;
 				CLANG_ENABLE_MODULES = YES;
@@ -322,6 +328,8 @@
 		529226FB1C85F68000C89379 /* Release */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				OTHER_CPLUSPLUSFLAGS = "$(inherited) -D_LIBCPP_HAS_NO_VERBOSE_ABORT -D_LIBCPP_DISABLE_AVAILABILITY";
+				OTHER_LDFLAGS = "$(inherited) -Wl,-weak-lswift_Concurrency";
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				ASSETCATALOG_COMPILER_LAUNCHIMAGE_NAME = LaunchImage;
 				CLANG_ENABLE_MODULES = YES;
diff --git a/messaging/integration_test/integration_test.xcodeproj/project.pbxproj b/messaging/integration_test/integration_test.xcodeproj/project.pbxproj
index 801d0a002c..0feae07166 100644
--- a/messaging/integration_test/integration_test.xcodeproj/project.pbxproj
+++ b/messaging/integration_test/integration_test.xcodeproj/project.pbxproj
@@ -399,6 +399,8 @@
 		529226F71C85F68000C89379 /* Debug */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				OTHER_CPLUSPLUSFLAGS = "$(inherited) -D_LIBCPP_HAS_NO_VERBOSE_ABORT -D_LIBCPP_DISABLE_AVAILABILITY";
+				OTHER_LDFLAGS = "$(inherited) -Wl,-weak-lswift_Concurrency";
 				ALWAYS_SEARCH_USER_PATHS = NO;
 				CLANG_CXX_LANGUAGE_STANDARD = "gnu++0x";
 				CLANG_CXX_LIBRARY = "libc++";
@@ -442,6 +444,8 @@
 		529226F81C85F68000C89379 /* Release */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				OTHER_CPLUSPLUSFLAGS = "$(inherited) -D_LIBCPP_HAS_NO_VERBOSE_ABORT -D_LIBCPP_DISABLE_AVAILABILITY";
+				OTHER_LDFLAGS = "$(inherited) -Wl,-weak-lswift_Concurrency";
 				ALWAYS_SEARCH_USER_PATHS = NO;
 				CLANG_CXX_LANGUAGE_STANDARD = "gnu++0x";
 				CLANG_CXX_LIBRARY = "libc++";
@@ -480,6 +484,8 @@
 			isa = XCBuildConfiguration;
 			baseConfigurationReference = 187DA1CE07295DEC4378B7E2 /* Pods-integration_test.debug.xcconfig */;
 			buildSettings = {
+				OTHER_CPLUSPLUSFLAGS = "$(inherited) -D_LIBCPP_HAS_NO_VERBOSE_ABORT -D_LIBCPP_DISABLE_AVAILABILITY";
+				OTHER_LDFLAGS = "$(inherited) -Wl,-weak-lswift_Concurrency";
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				ASSETCATALOG_COMPILER_LAUNCHIMAGE_NAME = LaunchImage;
 				CLANG_ENABLE_MODULES = YES;
@@ -513,6 +519,8 @@
 			isa = XCBuildConfiguration;
 			baseConfigurationReference = 577B09235E486561D55F37DF /* Pods-integration_test.release.xcconfig */;
 			buildSettings = {
+				OTHER_CPLUSPLUSFLAGS = "$(inherited) -D_LIBCPP_HAS_NO_VERBOSE_ABORT -D_LIBCPP_DISABLE_AVAILABILITY";
+				OTHER_LDFLAGS = "$(inherited) -Wl,-weak-lswift_Concurrency";
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				ASSETCATALOG_COMPILER_LAUNCHIMAGE_NAME = LaunchImage;
 				CLANG_ENABLE_MODULES = YES;
@@ -545,6 +553,8 @@
 			isa = XCBuildConfiguration;
 			baseConfigurationReference = CCCD7F9F30C5B4CDF23E3893 /* Pods-integration_test_tvos.debug.xcconfig */;
 			buildSettings = {
+				OTHER_CPLUSPLUSFLAGS = "$(inherited) -D_LIBCPP_HAS_NO_VERBOSE_ABORT -D_LIBCPP_DISABLE_AVAILABILITY";
+				OTHER_LDFLAGS = "$(inherited) -Wl,-weak-lswift_Concurrency";
 				ASSETCATALOG_COMPILER_APPICON_NAME = "App Icon & Top Shelf Image";
 				ASSETCATALOG_COMPILER_GLOBAL_ACCENT_COLOR_NAME = AccentColor;
 				CLANG_ANALYZER_NONNULL = YES;
@@ -600,6 +610,8 @@
 			isa = XCBuildConfiguration;
 			baseConfigurationReference = 81EF7FBB876B573921A52197 /* Pods-integration_test_tvos.release.xcconfig */;
 			buildSettings = {
+				OTHER_CPLUSPLUSFLAGS = "$(inherited) -D_LIBCPP_HAS_NO_VERBOSE_ABORT -D_LIBCPP_DISABLE_AVAILABILITY";
+				OTHER_LDFLAGS = "$(inherited) -Wl,-weak-lswift_Concurrency";
 				ASSETCATALOG_COMPILER_APPICON_NAME = "App Icon & Top Shelf Image";
 				ASSETCATALOG_COMPILER_GLOBAL_ACCENT_COLOR_NAME = AccentColor;
 				CLANG_ANALYZER_NONNULL = YES;
diff --git a/release_build_files/readme.md b/release_build_files/readme.md
index ea9e5dedd4..abdf6b8bfc 100644
--- a/release_build_files/readme.md
+++ b/release_build_files/readme.md
@@ -265,10 +265,16 @@ the Firebase iOS SDK. Please ensure that you reference the Cocoapod versions
 listed above.
 
 Note: Parts of the Firebase iOS SDK are written in Swift. If your application
-does not use any Swift code, you may need to add a .swift file to your
-Xcode project to ensure that the Swift runtime is included in your app. To
-ensure compatibility with Swift Concurrency on iOS 15 and 16, this file should
-contain a dummy async function: `func _firebase_sdk_dummy_async() async {}`.
+does not use any Swift code, you may need to add an empty .swift file to your
+Xcode project to ensure that the Swift runtime is included in your app.
+
+Additionally, to resolve known Xcode 15+ crashes when deploying to iOS 15 or 16,
+you must add `-Wl,-weak-lswift_Concurrency` to your `OTHER_LDFLAGS` (Other
+Linker Flags). If your application crashes with a 'Symbol not found' error for
+`__libcpp_verbose_abort`, you should also add
+`-D_LIBCPP_HAS_NO_VERBOSE_ABORT -D_LIBCPP_DISABLE_AVAILABILITY` to your
+`OTHER_CPLUSPLUSFLAGS` (Other C++ Flags), or provide a fallback implementation
+in your code (e.g., `extern "C" void __libcpp_verbose_abort(const char* f, ...) { abort(); }`).
 
 #### Libraries
 
@@ -326,10 +332,16 @@ the Firebase iOS SDK. Please ensure that you reference the Cocoapod versions
 listed above.
 
 Note: Parts of the Firebase iOS SDK are written in Swift. If your application
-does not use any Swift code, you may need to add a .swift file to your
-Xcode project to ensure that the Swift runtime is included in your app. To
-ensure compatibility with Swift Concurrency on iOS 15 and 16, this file should
-contain a dummy async function: `func _firebase_sdk_dummy_async() async {}`.
+does not use any Swift code, you may need to add an empty .swift file to your
+Xcode project to ensure that the Swift runtime is included in your app.
+
+Additionally, to resolve known Xcode 15+ crashes when deploying to iOS 15 or 16,
+you must add `-Wl,-weak-lswift_Concurrency` to your `OTHER_LDFLAGS` (Other
+Linker Flags). If your application crashes with a 'Symbol not found' error for
+`__libcpp_verbose_abort`, you should also add
+`-D_LIBCPP_HAS_NO_VERBOSE_ABORT -D_LIBCPP_DISABLE_AVAILABILITY` to your
+`OTHER_CPLUSPLUSFLAGS` (Other C++ Flags), or provide a fallback implementation
+in your code (e.g., `extern "C" void __libcpp_verbose_abort(const char* f, ...) { abort(); }`).
 
 ### Desktop Implementation Dependencies
 
@@ -622,6 +634,7 @@ code.
     - Functions (general): Add in support for Limited Use Tokens.
     - Storage: Added `List` API for all platforms, which gets the list of items under a `StorageReference`
     - Analytics: Add in `LogAppleTransaction` for logging Storekit 2 transactions on iOS.
+    - General (iOS): Added `-Wl,-weak-lswift_Concurrency` and `-D_LIBCPP_HAS_NO_VERBOSE_ABORT` flags to resolve Xcode 15+ launch crashes on iOS 15 and 16.
 
 ### 13.5.0
 -   Changes
diff --git a/remote_config/integration_test/integration_test.xcodeproj/project.pbxproj b/remote_config/integration_test/integration_test.xcodeproj/project.pbxproj
index 632c12c670..73c61f851b 100644
--- a/remote_config/integration_test/integration_test.xcodeproj/project.pbxproj
+++ b/remote_config/integration_test/integration_test.xcodeproj/project.pbxproj
@@ -375,6 +375,8 @@
 		529226F71C85F68000C89379 /* Debug */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				OTHER_CPLUSPLUSFLAGS = "$(inherited) -D_LIBCPP_HAS_NO_VERBOSE_ABORT -D_LIBCPP_DISABLE_AVAILABILITY";
+				OTHER_LDFLAGS = "$(inherited) -Wl,-weak-lswift_Concurrency";
 				ALWAYS_SEARCH_USER_PATHS = NO;
 				CLANG_CXX_LANGUAGE_STANDARD = "gnu++0x";
 				CLANG_CXX_LIBRARY = "libc++";
@@ -418,6 +420,8 @@
 		529226F81C85F68000C89379 /* Release */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				OTHER_CPLUSPLUSFLAGS = "$(inherited) -D_LIBCPP_HAS_NO_VERBOSE_ABORT -D_LIBCPP_DISABLE_AVAILABILITY";
+				OTHER_LDFLAGS = "$(inherited) -Wl,-weak-lswift_Concurrency";
 				ALWAYS_SEARCH_USER_PATHS = NO;
 				CLANG_CXX_LANGUAGE_STANDARD = "gnu++0x";
 				CLANG_CXX_LIBRARY = "libc++";
@@ -455,6 +459,8 @@
 		529226FA1C85F68000C89379 /* Debug */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				OTHER_CPLUSPLUSFLAGS = "$(inherited) -D_LIBCPP_HAS_NO_VERBOSE_ABORT -D_LIBCPP_DISABLE_AVAILABILITY";
+				OTHER_LDFLAGS = "$(inherited) -Wl,-weak-lswift_Concurrency";
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				ASSETCATALOG_COMPILER_LAUNCHIMAGE_NAME = LaunchImage;
 				CLANG_ENABLE_MODULES = YES;
@@ -487,6 +493,8 @@
 		529226FB1C85F68000C89379 /* Release */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				OTHER_CPLUSPLUSFLAGS = "$(inherited) -D_LIBCPP_HAS_NO_VERBOSE_ABORT -D_LIBCPP_DISABLE_AVAILABILITY";
+				OTHER_LDFLAGS = "$(inherited) -Wl,-weak-lswift_Concurrency";
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				ASSETCATALOG_COMPILER_LAUNCHIMAGE_NAME = LaunchImage;
 				CLANG_ENABLE_MODULES = YES;
@@ -518,6 +526,8 @@
 		BC1D665F2668D10A005DC2DA /* Debug */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				OTHER_CPLUSPLUSFLAGS = "$(inherited) -D_LIBCPP_HAS_NO_VERBOSE_ABORT -D_LIBCPP_DISABLE_AVAILABILITY";
+				OTHER_LDFLAGS = "$(inherited) -Wl,-weak-lswift_Concurrency";
 				ASSETCATALOG_COMPILER_APPICON_NAME = "App Icon & Top Shelf Image";
 				ASSETCATALOG_COMPILER_GLOBAL_ACCENT_COLOR_NAME = AccentColor;
 				CLANG_ANALYZER_NONNULL = YES;
@@ -572,6 +582,8 @@
 		BC1D66602668D10A005DC2DA /* Release */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				OTHER_CPLUSPLUSFLAGS = "$(inherited) -D_LIBCPP_HAS_NO_VERBOSE_ABORT -D_LIBCPP_DISABLE_AVAILABILITY";
+				OTHER_LDFLAGS = "$(inherited) -Wl,-weak-lswift_Concurrency";
 				ASSETCATALOG_COMPILER_APPICON_NAME = "App Icon & Top Shelf Image";
 				ASSETCATALOG_COMPILER_GLOBAL_ACCENT_COLOR_NAME = AccentColor;
 				CLANG_ANALYZER_NONNULL = YES;
diff --git a/setup_integration_tests.py b/setup_integration_tests.py
index f4f7cd5869..e9bba2229e 100755
--- a/setup_integration_tests.py
+++ b/setup_integration_tests.py
@@ -57,3 +57,18 @@
     for src in FRAMEWORK_DIRECTORIES:
         print('Copying %s to %s' % (src, dest))
         copy_tree(src, dest, update=1)
+
+        # Workaround for Xcode 15 / Swift 5.10 Concurrency crash on iOS 15 and 16
+        pbxproj_path = os.path.join(dest, "integration_test.xcodeproj", "project.pbxproj")
+        if os.path.exists(pbxproj_path):
+            with open(pbxproj_path, "r") as f:
+                pbx_content = f.read()
+            if "-Wl,-weak-lswift_Concurrency" not in pbx_content:
+                pbx_content = pbx_content.replace(
+                    "buildSettings = {",
+                    "buildSettings = {\n\t\t\t\tOTHER_CPLUSPLUSFLAGS = \"$(inherited) -D_LIBCPP_HAS_NO_VERBOSE_ABORT -D_LIBCPP_DISABLE_AVAILABILITY\";\n\t\t\t\tOTHER_LDFLAGS = \"-Wl,-weak-lswift_Concurrency\";"
+                )
+                with open(pbxproj_path, "w") as f:
+                    f.write(pbx_content)
+                print("Patched " + pbxproj_path + " for Swift Concurrency backwards compatibility.")
+
diff --git a/storage/integration_test/integration_test.xcodeproj/project.pbxproj b/storage/integration_test/integration_test.xcodeproj/project.pbxproj
index 4d0bde1f79..eaf61e41d1 100644
--- a/storage/integration_test/integration_test.xcodeproj/project.pbxproj
+++ b/storage/integration_test/integration_test.xcodeproj/project.pbxproj
@@ -386,6 +386,8 @@
 		529226F71C85F68000C89379 /* Debug */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				OTHER_CPLUSPLUSFLAGS = "$(inherited) -D_LIBCPP_HAS_NO_VERBOSE_ABORT -D_LIBCPP_DISABLE_AVAILABILITY";
+				OTHER_LDFLAGS = "$(inherited) -Wl,-weak-lswift_Concurrency";
 				ALWAYS_SEARCH_USER_PATHS = NO;
 				CLANG_CXX_LANGUAGE_STANDARD = "gnu++0x";
 				CLANG_CXX_LIBRARY = "libc++";
@@ -429,6 +431,8 @@
 		529226F81C85F68000C89379 /* Release */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				OTHER_CPLUSPLUSFLAGS = "$(inherited) -D_LIBCPP_HAS_NO_VERBOSE_ABORT -D_LIBCPP_DISABLE_AVAILABILITY";
+				OTHER_LDFLAGS = "$(inherited) -Wl,-weak-lswift_Concurrency";
 				ALWAYS_SEARCH_USER_PATHS = NO;
 				CLANG_CXX_LANGUAGE_STANDARD = "gnu++0x";
 				CLANG_CXX_LIBRARY = "libc++";
@@ -466,6 +470,8 @@
 		529226FA1C85F68000C89379 /* Debug */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				OTHER_CPLUSPLUSFLAGS = "$(inherited) -D_LIBCPP_HAS_NO_VERBOSE_ABORT -D_LIBCPP_DISABLE_AVAILABILITY";
+				OTHER_LDFLAGS = "$(inherited) -Wl,-weak-lswift_Concurrency";
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				ASSETCATALOG_COMPILER_LAUNCHIMAGE_NAME = LaunchImage;
 				CLANG_ENABLE_MODULES = YES;
@@ -499,6 +505,8 @@
 		529226FB1C85F68000C89379 /* Release */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				OTHER_CPLUSPLUSFLAGS = "$(inherited) -D_LIBCPP_HAS_NO_VERBOSE_ABORT -D_LIBCPP_DISABLE_AVAILABILITY";
+				OTHER_LDFLAGS = "$(inherited) -Wl,-weak-lswift_Concurrency";
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				ASSETCATALOG_COMPILER_LAUNCHIMAGE_NAME = LaunchImage;
 				CLANG_ENABLE_MODULES = YES;
@@ -531,6 +539,8 @@
 		BC1D669F2679868B005DC2DA /* Debug */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				OTHER_CPLUSPLUSFLAGS = "$(inherited) -D_LIBCPP_HAS_NO_VERBOSE_ABORT -D_LIBCPP_DISABLE_AVAILABILITY";
+				OTHER_LDFLAGS = "$(inherited) -Wl,-weak-lswift_Concurrency";
 				ASSETCATALOG_COMPILER_APPICON_NAME = "App Icon & Top Shelf Image";
 				ASSETCATALOG_COMPILER_GLOBAL_ACCENT_COLOR_NAME = AccentColor;
 				CLANG_ANALYZER_NONNULL = YES;
@@ -588,6 +598,8 @@
 		BC1D66A02679868B005DC2DA /* Release */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				OTHER_CPLUSPLUSFLAGS = "$(inherited) -D_LIBCPP_HAS_NO_VERBOSE_ABORT -D_LIBCPP_DISABLE_AVAILABILITY";
+				OTHER_LDFLAGS = "$(inherited) -Wl,-weak-lswift_Concurrency";
 				ASSETCATALOG_COMPILER_APPICON_NAME = "App Icon & Top Shelf Image";
 				ASSETCATALOG_COMPILER_GLOBAL_ACCENT_COLOR_NAME = AccentColor;
 				CLANG_ANALYZER_NONNULL = YES;
diff --git a/testing/sample_framework/src/app_framework.cc b/testing/sample_framework/src/app_framework.cc
index bed0d01526..c432cf3c84 100644
--- a/testing/sample_framework/src/app_framework.cc
+++ b/testing/sample_framework/src/app_framework.cc
@@ -15,6 +15,9 @@
 #include "app_framework.h"  // NOLINT
 
 #include <inttypes.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
 #include <sys/stat.h>
 
 #include <algorithm>
@@ -23,6 +26,24 @@
 #include <cstring>
 #include <ctime>
 
+#if defined(__APPLE__)
+// Workaround for Xcode 15 / Swift 5.10 Concurrency and C++ verbose abort
+// crash on older iOS versions (iOS 15/16).
+// By providing these symbols in our own binary, we prevent dyld from
+// crashing when they are missing from the system libraries on older OSs.
+namespace std {
+inline namespace __1 {
+__attribute__((weak)) void __libcpp_verbose_abort(const char* format, ...) {
+  va_list list;
+  va_start(list, format);
+  vfprintf(stderr, format, list);
+  va_end(list);
+  abort();
+}
+}  // namespace __1
+}  // namespace std
+#endif
+
 namespace app_framework {
 
 // Base logging methods, implemented by platform-specific files.
diff --git a/testing/sample_framework/src/empty.swift b/testing/sample_framework/src/empty.swift
index 97e8fbb973..e1cb622251 100644
--- a/testing/sample_framework/src/empty.swift
+++ b/testing/sample_framework/src/empty.swift
@@ -13,13 +13,3 @@
 // limitations under the License.
 
 // This empty Swift file is needed to ensure the Swift runtime is included.
-// along with forcing the swift async libraries to be linked on older versions of iOS/tvOS
-
-import Foundation
-
-// This dummy async function forces Xcode to automatically link the 
-// Swift Concurrency backwards-compatibility libraries (libswift_Concurrency) 
-// on older iOS versions (iOS 15/16).
-@available(iOS 13.0, tvOS 13.0, macOS 10.15, watchOS 6.0, *)
-func _firebase_sdk_dummy_async_func() async {
-}
diff --git a/ump/integration_test/integration_test.xcodeproj/project.pbxproj b/ump/integration_test/integration_test.xcodeproj/project.pbxproj
index 6b7651922e..8a4c20e749 100644
--- a/ump/integration_test/integration_test.xcodeproj/project.pbxproj
+++ b/ump/integration_test/integration_test.xcodeproj/project.pbxproj
@@ -214,6 +214,8 @@
 		529226F71C85F68000C89379 /* Debug */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				OTHER_CPLUSPLUSFLAGS = "$(inherited) -D_LIBCPP_HAS_NO_VERBOSE_ABORT -D_LIBCPP_DISABLE_AVAILABILITY";
+				OTHER_LDFLAGS = "$(inherited) -Wl,-weak-lswift_Concurrency";
 				ALWAYS_SEARCH_USER_PATHS = NO;
 				CLANG_CXX_LANGUAGE_STANDARD = "gnu++0x";
 				CLANG_CXX_LIBRARY = "libc++";
@@ -257,6 +259,8 @@
 		529226F81C85F68000C89379 /* Release */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				OTHER_CPLUSPLUSFLAGS = "$(inherited) -D_LIBCPP_HAS_NO_VERBOSE_ABORT -D_LIBCPP_DISABLE_AVAILABILITY";
+				OTHER_LDFLAGS = "$(inherited) -Wl,-weak-lswift_Concurrency";
 				ALWAYS_SEARCH_USER_PATHS = NO;
 				CLANG_CXX_LANGUAGE_STANDARD = "gnu++0x";
 				CLANG_CXX_LIBRARY = "libc++";
@@ -294,6 +298,8 @@
 		529226FA1C85F68000C89379 /* Debug */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				OTHER_CPLUSPLUSFLAGS = "$(inherited) -D_LIBCPP_HAS_NO_VERBOSE_ABORT -D_LIBCPP_DISABLE_AVAILABILITY";
+				OTHER_LDFLAGS = "$(inherited) -Wl,-weak-lswift_Concurrency";
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				ASSETCATALOG_COMPILER_LAUNCHIMAGE_NAME = LaunchImage;
 				CLANG_ENABLE_MODULES = YES;
@@ -327,6 +333,8 @@
 		529226FB1C85F68000C89379 /* Release */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				OTHER_CPLUSPLUSFLAGS = "$(inherited) -D_LIBCPP_HAS_NO_VERBOSE_ABORT -D_LIBCPP_DISABLE_AVAILABILITY";
+				OTHER_LDFLAGS = "$(inherited) -Wl,-weak-lswift_Concurrency";
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				ASSETCATALOG_COMPILER_LAUNCHIMAGE_NAME = LaunchImage;
 				CLANG_ENABLE_MODULES = YES;