From 8ed2cfded51d47731686c1060915bee7dd63647e Mon Sep 17 00:00:00 2001
From: Alexander Eggers <alex.eggers@myzeller.com>
Date: Thu, 8 Jun 2023 03:06:31 -0700
Subject: [PATCH] Add support for building with Xcode 15 (#37758)

Summary:
Fixes https://github.com/facebook/react-native/issues/37748

This PR adds a patch which fixes a build issue in Xcode 15.

## Changelog:

[IOS] [ADDED] - Add support for building with Xcode 15

Pull Request resolved: https://github.com/facebook/react-native/pull/37758

Reviewed By: cortinico

Differential Revision: D46524009

Pulled By: cipolleschi

fbshipit-source-id: 9f6c12e12a15c154467282a7b4a00e80e5cc0af2
---
 .../scripts/cocoapods/__tests__/utils-test.rb | 54 +++++++++++++++++++
 .../react-native/scripts/cocoapods/utils.rb   | 12 +++++
 .../react-native/scripts/react_native_pods.rb |  1 +
 3 files changed, 67 insertions(+)

diff --git a/packages/react-native/scripts/cocoapods/__tests__/utils-test.rb b/packages/react-native/scripts/cocoapods/__tests__/utils-test.rb
index 843b58336fb6e7..5a1c98e6bc6f5d 100644
--- a/packages/react-native/scripts/cocoapods/__tests__/utils-test.rb
+++ b/packages/react-native/scripts/cocoapods/__tests__/utils-test.rb
@@ -434,6 +434,60 @@ def test_applyMacCatalystPatches_correctlyAppliesNecessaryPatches
         assert_equal(user_project_mock.save_invocation_count, 1)
     end
 
+    # ================================= #
+    # Test - Apply Xcode 15 Patch       #
+    # ================================= #
+
+    def test_applyXcode15Patch_correctlyAppliesNecessaryPatch
+        # Arrange
+        first_target = prepare_target("FirstTarget")
+        second_target = prepare_target("SecondTarget")
+        third_target = TargetMock.new("ThirdTarget", [
+            BuildConfigurationMock.new("Debug", {
+              "GCC_PREPROCESSOR_DEFINITIONS" => '$(inherited) "SomeFlag=1" '
+            }),
+            BuildConfigurationMock.new("Release", {
+              "GCC_PREPROCESSOR_DEFINITIONS" => '$(inherited) "SomeFlag=1" '
+            }),
+        ], nil)
+
+        user_project_mock = UserProjectMock.new("a/path", [
+                prepare_config("Debug"),
+                prepare_config("Release"),
+            ],
+            :native_targets => [
+                first_target,
+                second_target
+            ]
+        )
+        pods_projects_mock = PodsProjectMock.new([], {"hermes-engine" => {}}, :native_targets => [
+            third_target
+        ])
+        installer = InstallerMock.new(pods_projects_mock, [
+            AggregatedProjectMock.new(user_project_mock)
+        ])
+
+        # Act
+        ReactNativePodsUtils.apply_xcode_15_patch(installer)
+
+        # Assert
+        first_target.build_configurations.each do |config|
+            assert_equal(config.build_settings["GCC_PREPROCESSOR_DEFINITIONS"].strip,
+                '$(inherited) "_LIBCPP_ENABLE_CXX17_REMOVED_UNARY_BINARY_FUNCTION"'
+            )
+        end
+        second_target.build_configurations.each do |config|
+            assert_equal(config.build_settings["GCC_PREPROCESSOR_DEFINITIONS"].strip,
+                '$(inherited) "_LIBCPP_ENABLE_CXX17_REMOVED_UNARY_BINARY_FUNCTION"'
+            )
+        end
+        third_target.build_configurations.each do |config|
+            assert_equal(config.build_settings["GCC_PREPROCESSOR_DEFINITIONS"].strip,
+                '$(inherited) "SomeFlag=1" "_LIBCPP_ENABLE_CXX17_REMOVED_UNARY_BINARY_FUNCTION"'
+            )
+        end
+    end
+
     # ==================================== #
     # Test - Set Node_Modules User Setting #
     # ==================================== #
diff --git a/packages/react-native/scripts/cocoapods/utils.rb b/packages/react-native/scripts/cocoapods/utils.rb
index 79c216f74ed754..44b2579e49a483 100644
--- a/packages/react-native/scripts/cocoapods/utils.rb
+++ b/packages/react-native/scripts/cocoapods/utils.rb
@@ -121,6 +121,18 @@ def self.apply_mac_catalyst_patches(installer)
         end
     end
 
+    def self.apply_xcode_15_patch(installer)
+        installer.target_installation_results.pod_target_installation_results
+            .each do |pod_name, target_installation_result|
+                target_installation_result.native_target.build_configurations.each do |config|
+                    # unary_function and binary_function are no longer provided in C++17 and newer standard modes as part of Xcode 15. They can be re-enabled with setting _LIBCPP_ENABLE_CXX17_REMOVED_UNARY_BINARY_FUNCTION
+                    # Ref: https://developer.apple.com/documentation/xcode-release-notes/xcode-15-release-notes#Deprecations
+                    config.build_settings['GCC_PREPROCESSOR_DEFINITIONS'] ||= '$(inherited) '
+                    config.build_settings['GCC_PREPROCESSOR_DEFINITIONS'] << '"_LIBCPP_ENABLE_CXX17_REMOVED_UNARY_BINARY_FUNCTION" '
+            end
+        end
+    end
+
     def self.apply_flags_for_fabric(installer, fabric_enabled: false)
         fabric_flag = "-DRN_FABRIC_ENABLED"
         if fabric_enabled
diff --git a/packages/react-native/scripts/react_native_pods.rb b/packages/react-native/scripts/react_native_pods.rb
index 6f1c24143ca78c..653385ed12eaeb 100644
--- a/packages/react-native/scripts/react_native_pods.rb
+++ b/packages/react-native/scripts/react_native_pods.rb
@@ -244,6 +244,7 @@ def react_native_post_install(
   ReactNativePodsUtils.update_search_paths(installer)
   ReactNativePodsUtils.set_node_modules_user_settings(installer, react_native_path)
   ReactNativePodsUtils.apply_flags_for_fabric(installer, fabric_enabled: fabric_enabled)
+  ReactNativePodsUtils.apply_xcode_15_patch(installer)
 
   NewArchitectureHelper.set_clang_cxx_language_standard_if_needed(installer)
   is_new_arch_enabled = ENV['RCT_NEW_ARCH_ENABLED'] == "1"