react · coado · Aug 7, 2026 · Aug 7, 2026 · Aug 7, 2026
diff --git a/packages/react-native/Libraries/ActionSheetIOS/React-RCTActionSheet.podspec b/packages/react-native/Libraries/ActionSheetIOS/React-RCTActionSheet.podspec
@@ -31,4 +31,6 @@ Pod::Spec.new do |s|
   s.header_dir             = "RCTActionSheet"
 
   s.dependency "React-Core/RCTActionSheetHeaders", version
+
+  mark_as_react_native_build(s)
 end
diff --git a/packages/react-native/Libraries/AppDelegate/React-RCTAppDelegate.podspec b/packages/react-native/Libraries/AppDelegate/React-RCTAppDelegate.podspec
@@ -86,4 +86,6 @@ Pod::Spec.new do |s|
   depend_on_js_engine(s)
   add_rn_third_party_dependencies(s)
   add_rncore_dependency(s)
+
+  mark_as_react_native_build(s)
 end
diff --git a/packages/react-native/Libraries/Blob/React-RCTBlob.podspec b/packages/react-native/Libraries/Blob/React-RCTBlob.podspec
@@ -56,4 +56,6 @@ Pod::Spec.new do |s|
 
   add_rn_third_party_dependencies(s)
   add_rncore_dependency(s)
+
+  mark_as_react_native_build(s)
 end
diff --git a/packages/react-native/Libraries/FBLazyVector/FBLazyVector.podspec b/packages/react-native/Libraries/FBLazyVector/FBLazyVector.podspec
@@ -28,4 +28,5 @@ Pod::Spec.new do |s|
   s.source_files           = podspec_sources("**/*.{c,h,m,mm,cpp}", "**/*.h")
   s.header_dir             = "FBLazyVector"
 
+  mark_as_react_native_build(s)
 end
diff --git a/packages/react-native/Libraries/Image/React-RCTImage.podspec b/packages/react-native/Libraries/Image/React-RCTImage.podspec
@@ -54,4 +54,6 @@ Pod::Spec.new do |s|
 
   add_rn_third_party_dependencies(s)
   add_rncore_dependency(s)
+
+  mark_as_react_native_build(s)
 end
diff --git a/packages/react-native/Libraries/LinkingIOS/React-RCTLinking.podspec b/packages/react-native/Libraries/LinkingIOS/React-RCTLinking.podspec
@@ -48,4 +48,6 @@ Pod::Spec.new do |s|
   add_dependency(s, "React-RCTFBReactNativeSpec")
   add_dependency(s, "ReactCommon", :subspec => "turbomodule/core", :additional_framework_paths => ["react/nativemodule/core"])
   add_dependency(s, "React-NativeModulesApple", :additional_framework_paths => ["build/generated/ios"])
+
+  mark_as_react_native_build(s)
 end
diff --git a/packages/react-native/Libraries/NativeAnimation/React-RCTAnimation.podspec b/packages/react-native/Libraries/NativeAnimation/React-RCTAnimation.podspec
@@ -52,4 +52,6 @@ Pod::Spec.new do |s|
 
   add_rn_third_party_dependencies(s)
   add_rncore_dependency(s)
+
+  mark_as_react_native_build(s)
 end
diff --git a/packages/react-native/Libraries/Network/React-RCTNetwork.podspec b/packages/react-native/Libraries/Network/React-RCTNetwork.podspec
@@ -54,4 +54,6 @@ Pod::Spec.new do |s|
 
   add_rn_third_party_dependencies(s)
   add_rncore_dependency(s)
+
+  mark_as_react_native_build(s)
 end
diff --git a/packages/react-native/Libraries/PushNotificationIOS/React-RCTPushNotification.podspec b/packages/react-native/Libraries/PushNotificationIOS/React-RCTPushNotification.podspec
@@ -50,4 +50,6 @@ Pod::Spec.new do |s|
   add_dependency(s, "React-NativeModulesApple")
 
   add_rncore_dependency(s)
+
+  mark_as_react_native_build(s)
 end
diff --git a/packages/react-native/Libraries/Required/RCTRequired.podspec b/packages/react-native/Libraries/Required/RCTRequired.podspec
@@ -27,4 +27,6 @@ Pod::Spec.new do |s|
   s.source                 = source
   s.source_files           = podspec_sources("**/*.{c,h,m,mm,cpp}", "**/*.h")
   s.header_dir             = "RCTRequired"
+
+  mark_as_react_native_build(s)
 end
diff --git a/packages/react-native/Libraries/Settings/React-RCTSettings.podspec b/packages/react-native/Libraries/Settings/React-RCTSettings.podspec
@@ -50,4 +50,6 @@ Pod::Spec.new do |s|
 
   add_rn_third_party_dependencies(s)
   add_rncore_dependency(s)
+
+  mark_as_react_native_build(s)
 end
diff --git a/packages/react-native/Libraries/Text/React-RCTText.podspec b/packages/react-native/Libraries/Text/React-RCTText.podspec
@@ -34,4 +34,6 @@ Pod::Spec.new do |s|
 
   s.dependency "Yoga"
   s.dependency "React-Core/RCTTextHeaders", version
+
+  mark_as_react_native_build(s)
 end
diff --git a/packages/react-native/Libraries/TypeSafety/RCTTypeSafety.podspec b/packages/react-native/Libraries/TypeSafety/RCTTypeSafety.podspec
@@ -36,4 +36,6 @@ Pod::Spec.new do |s|
   s.dependency "FBLazyVector", version
   s.dependency "RCTRequired", version
   s.dependency "React-Core", version
+
+  mark_as_react_native_build(s)
 end
diff --git a/packages/react-native/Libraries/Vibration/React-RCTVibration.podspec b/packages/react-native/Libraries/Vibration/React-RCTVibration.podspec
@@ -50,4 +50,6 @@ Pod::Spec.new do |s|
 
   add_rn_third_party_dependencies(s)
   add_rncore_dependency(s)
+
+  mark_as_react_native_build(s)
 end
diff --git a/packages/react-native/Package.swift b/packages/react-native/Package.swift
@@ -948,6 +948,10 @@ extension Target {
         CXXSetting.headerSearchPath(relativeSearchPath(numOfSlash + 1, ".build/headers/React")),
       ]
 
+    // Every target built through this factory is React Native's own, so RN_BUILDING
+    // keeps the react/cxxstableapi guards inert for internal sources. cxxSettings are
+    // per-target and are not inherited by packages that depend on React, so this does
+    // not exempt consumers from the guards.
     let cxxSettings =
       [
         .unsafeFlags(["-std=c++20"]),
@@ -956,6 +960,7 @@ extension Target {
         .define("USE_HERMES", to: "1"),
         .define("RCT_REMOVE_LEGACY_ARCH", to: "1"),
         .define("HERMES_V1_ENABLED", to: "1"),
+        .define("RN_BUILDING", to: "1"),
       ] + defines + cxxCommonHeaderPaths
 
     return .target(

diff --git a/packages/react-native/React-Core-prebuilt.podspec b/packages/react-native/React-Core-prebuilt.podspec
@@ -103,4 +103,6 @@ Pod::Spec.new do |s|
 
     s.script_phase = script_phase
   end
+
+  mark_as_react_native_build(s)
 end
diff --git a/packages/react-native/React-Core.podspec b/packages/react-native/React-Core.podspec
@@ -141,4 +141,6 @@ Pod::Spec.new do |s|
   depend_on_js_engine(s)
   add_rn_third_party_dependencies(s)
   add_rncore_dependency(s)
+
+  mark_as_react_native_build(s)
 end
diff --git a/packages/react-native/React.podspec b/packages/react-native/React.podspec
@@ -53,4 +53,6 @@ Pod::Spec.new do |s|
   s.dependency "React-RCTSettings", version
   s.dependency "React-RCTText", version
   s.dependency "React-RCTVibration", version
+
+  mark_as_react_native_build(s)
 end
diff --git a/packages/react-native/React/CoreModules/React-CoreModules.podspec b/packages/react-native/React/CoreModules/React-CoreModules.podspec
@@ -67,4 +67,6 @@ Pod::Spec.new do |s|
 
   add_rn_third_party_dependencies(s)
   add_rncore_dependency(s)
+
+  mark_as_react_native_build(s)
 end
diff --git a/packages/react-native/React/React-RCTFBReactNativeSpec.podspec b/packages/react-native/React/React-RCTFBReactNativeSpec.podspec
@@ -92,4 +92,6 @@ fi
       EOS
     }
   ]
+
+  mark_as_react_native_build(s)
 end
diff --git a/packages/react-native/React/React-RCTFabric.podspec b/packages/react-native/React/React-RCTFabric.podspec
@@ -109,4 +109,6 @@ Pod::Spec.new do |s|
     test_spec.source_files = podspec_sources("Tests/**/*.{mm}", "")
     test_spec.framework = "XCTest"
   end
+
+  mark_as_react_native_build(s)
 end
diff --git a/packages/react-native/React/Runtime/React-RCTRuntime.podspec b/packages/react-native/React/Runtime/React-RCTRuntime.podspec
@@ -69,4 +69,6 @@ Pod::Spec.new do |s|
   depend_on_js_engine(s)
   add_rn_third_party_dependencies(s)
   add_rncore_dependency(s)
+
+  mark_as_react_native_build(s)
 end
diff --git a/packages/react-native/ReactAndroid/src/main/jni/CMakeLists.txt b/packages/react-native/ReactAndroid/src/main/jni/CMakeLists.txt
@@ -58,6 +58,14 @@ add_react_third_party_ndk_subdir(fast_float)
 add_react_third_party_ndk_subdir(fmt)
 add_react_third_party_ndk_subdir(folly)
 
+# Marks everything added below as React Native's own build, so the
+# react/cxxstableapi guards let internal sources keep including the
+# fine-grained headers they fence off from consumers. Deliberately declared
+# after the third-party subdirectories so it never reaches them, and this
+# project never compiles app or third-party module code (those build against
+# the prefab artifacts through ReactNative-application.cmake).
+add_compile_definitions(RN_BUILDING)
+
 # Common targets
 add_react_common_subdir(yoga)
 add_react_common_subdir(runtimeexecutor)

diff --git a/...ges/react-native/ReactApple/Libraries/RCTFoundation/RCTDeprecation/RCTDeprecation.podspec b/...ges/react-native/ReactApple/Libraries/RCTFoundation/RCTDeprecation/RCTDeprecation.podspec
@@ -22,4 +22,6 @@ Pod::Spec.new do |s|
       "CLANG_CXX_LANGUAGE_STANDARD" => rct_cxx_language_standard()
     }
     s.compiler_flags         = "-Wnullable-to-nonnull-conversion -Wnullability-completeness"
+
+    mark_as_react_native_build(s)
   end
diff --git a/...react-native/ReactApple/RCTAnimatedModuleProvider/React-RCTAnimatedModuleProvider.podspec b/...react-native/ReactApple/RCTAnimatedModuleProvider/React-RCTAnimatedModuleProvider.podspec
@@ -60,4 +60,6 @@ Pod::Spec.new do |s|
   depend_on_js_engine(s)
   add_rn_third_party_dependencies(s)
   add_rncore_dependency(s)
+
+  mark_as_react_native_build(s)
 end
diff --git a/packages/react-native/ReactApple/RCTSwiftUI/RCTSwiftUI.podspec b/packages/react-native/ReactApple/RCTSwiftUI/RCTSwiftUI.podspec
@@ -36,4 +36,5 @@ Pod::Spec.new do |s|
     "DEFINES_MODULE" => "YES",
   }
 
+  mark_as_react_native_build(s)
 end
diff --git a/packages/react-native/ReactApple/RCTSwiftUIWrapper/RCTSwiftUIWrapper.podspec b/packages/react-native/ReactApple/RCTSwiftUIWrapper/RCTSwiftUIWrapper.podspec
@@ -34,4 +34,5 @@ Pod::Spec.new do |s|
     "SWIFT_VERSION" => "5.0",
   }
 
+  mark_as_react_native_build(s)
 end
diff --git a/packages/react-native/ReactCommon/React-Fabric.podspec b/packages/react-native/ReactCommon/React-Fabric.podspec
@@ -236,4 +236,6 @@ Pod::Spec.new do |s|
     ss.source_files         = podspec_sources("react/renderer/viewtransition/**/*.{m,mm,cpp,h}", "react/renderer/viewtransition/**/*.h")
     ss.header_dir           = "react/renderer/viewtransition"
   end
+
+  mark_as_react_native_build(s)
 end
diff --git a/packages/react-native/ReactCommon/React-FabricComponents.podspec b/packages/react-native/ReactCommon/React-FabricComponents.podspec
@@ -160,4 +160,6 @@ Pod::Spec.new do |s|
                               "react/renderer/textlayoutmanager/platform/cxx"
     ss.header_dir           = "react/renderer/textlayoutmanager"
   end
+
+  mark_as_react_native_build(s)
 end
diff --git a/packages/react-native/ReactCommon/React-FabricImage.podspec b/packages/react-native/ReactCommon/React-FabricImage.podspec
@@ -76,4 +76,6 @@ Pod::Spec.new do |s|
   depend_on_js_engine(s)
   add_rn_third_party_dependencies(s)
   add_rncore_dependency(s)
+
+  mark_as_react_native_build(s)
 end
diff --git a/packages/react-native/ReactCommon/React-Mapbuffer.podspec b/packages/react-native/ReactCommon/React-Mapbuffer.podspec
@@ -37,4 +37,6 @@ Pod::Spec.new do |s|
   add_dependency(s, "React-debug")
   add_rn_third_party_dependencies(s)
   add_rncore_dependency(s)
+
+  mark_as_react_native_build(s)
 end
diff --git a/packages/react-native/ReactCommon/ReactCommon.podspec b/packages/react-native/ReactCommon/ReactCommon.podspec
@@ -59,4 +59,6 @@ Pod::Spec.new do |s|
       sss.dependency "React-utils", version
     end
   end
+
+  mark_as_react_native_build(s)
 end
diff --git a/packages/react-native/ReactCommon/callinvoker/React-callinvoker.podspec b/packages/react-native/ReactCommon/callinvoker/React-callinvoker.podspec
@@ -27,4 +27,6 @@ Pod::Spec.new do |s|
   s.source                 = source
   s.source_files           = podspec_sources("**/*.{cpp,h}", "**/*.h")
   s.header_dir             = "ReactCommon"
+
+  mark_as_react_native_build(s)
 end
diff --git a/packages/react-native/ReactCommon/cxxreact/React-cxxreact.podspec b/packages/react-native/ReactCommon/cxxreact/React-cxxreact.podspec
@@ -55,4 +55,6 @@ Pod::Spec.new do |s|
 
   add_rn_third_party_dependencies(s)
   add_rncore_dependency(s)
+
+  mark_as_react_native_build(s)
 end
diff --git a/packages/react-native/ReactCommon/hermes/React-hermes.podspec b/packages/react-native/ReactCommon/hermes/React-hermes.podspec
@@ -51,4 +51,6 @@ Pod::Spec.new do |s|
 
   add_rn_third_party_dependencies(s)
   add_rncore_dependency(s)
+
+  mark_as_react_native_build(s)
 end
diff --git a/packages/react-native/ReactCommon/hermes/executor/React-jsitracing.podspec b/packages/react-native/ReactCommon/hermes/executor/React-jsitracing.podspec
@@ -35,4 +35,6 @@ Pod::Spec.new do |s|
   resolve_use_frameworks(s, header_mappings_dir: './', module_name: "React_jsitracing")
 
   s.dependency "React-jsi"
+
+  mark_as_react_native_build(s)
 end
diff --git a/packages/react-native/ReactCommon/jserrorhandler/React-jserrorhandler.podspec b/packages/react-native/ReactCommon/jserrorhandler/React-jserrorhandler.podspec
@@ -48,4 +48,5 @@ Pod::Spec.new do |s|
   add_rn_third_party_dependencies(s)
   add_rncore_dependency(s)
 
+  mark_as_react_native_build(s)
 end
diff --git a/packages/react-native/ReactCommon/jsi/React-jsi.podspec b/packages/react-native/ReactCommon/jsi/React-jsi.podspec
@@ -47,4 +47,6 @@ Pod::Spec.new do |s|
 
   add_rn_third_party_dependencies(s)
   add_rncore_dependency(s)
+
+  mark_as_react_native_build(s)
 end
diff --git a/packages/react-native/ReactCommon/jsiexecutor/React-jsiexecutor.podspec b/packages/react-native/ReactCommon/jsiexecutor/React-jsiexecutor.podspec
@@ -48,4 +48,6 @@ Pod::Spec.new do |s|
 
   add_rn_third_party_dependencies(s)
   add_rncore_dependency(s)
+
+  mark_as_react_native_build(s)
 end
diff --git a/packages/react-native/ReactCommon/jsinspector-modern/React-jsinspector.podspec b/packages/react-native/ReactCommon/jsinspector-modern/React-jsinspector.podspec
@@ -62,4 +62,6 @@ Pod::Spec.new do |s|
 
   add_rn_third_party_dependencies(s)
   add_rncore_dependency(s)
+
+  mark_as_react_native_build(s)
 end
diff --git a/packages/react-native/ReactCommon/jsinspector-modern/cdp/React-jsinspectorcdp.podspec b/packages/react-native/ReactCommon/jsinspector-modern/cdp/React-jsinspectorcdp.podspec
@@ -45,4 +45,6 @@ Pod::Spec.new do |s|
 
   add_rn_third_party_dependencies(s)
   add_rncore_dependency(s)
+
+  mark_as_react_native_build(s)
 end
diff --git a/...ages/react-native/ReactCommon/jsinspector-modern/network/React-jsinspectornetwork.podspec b/...ages/react-native/ReactCommon/jsinspector-modern/network/React-jsinspectornetwork.podspec
@@ -47,4 +47,6 @@ Pod::Spec.new do |s|
 
   add_rn_third_party_dependencies(s)
   add_rncore_dependency(s)
+
+  mark_as_react_native_build(s)
 end
diff --git a/...ages/react-native/ReactCommon/jsinspector-modern/tracing/React-jsinspectortracing.podspec b/...ages/react-native/ReactCommon/jsinspector-modern/tracing/React-jsinspectortracing.podspec
@@ -55,4 +55,6 @@ Pod::Spec.new do |s|
 
   add_rn_third_party_dependencies(s)
   add_rncore_dependency(s)
+
+  mark_as_react_native_build(s)
 end
diff --git a/packages/react-native/ReactCommon/jsitooling/React-jsitooling.podspec b/packages/react-native/ReactCommon/jsitooling/React-jsitooling.podspec
@@ -50,4 +50,6 @@ Pod::Spec.new do |s|
 
   add_rn_third_party_dependencies(s)
   add_rncore_dependency(s)
+
+  mark_as_react_native_build(s)
 end
diff --git a/packages/react-native/ReactCommon/logger/React-logger.podspec b/packages/react-native/ReactCommon/logger/React-logger.podspec
@@ -31,4 +31,6 @@ Pod::Spec.new do |s|
 
   add_rn_third_party_dependencies(s)
   add_rncore_dependency(s)
+
+  mark_as_react_native_build(s)
 end
diff --git a/packages/react-native/ReactCommon/oscompat/React-oscompat.podspec b/packages/react-native/ReactCommon/oscompat/React-oscompat.podspec
@@ -28,4 +28,6 @@ Pod::Spec.new do |s|
   s.source_files           = podspec_sources("*.{cpp,h}", "*.{h}")
   s.pod_target_xcconfig    = { "HEADER_SEARCH_PATHS" => "" }
   s.header_dir             = "oscompat"
+
+  mark_as_react_native_build(s)
 end
diff --git a/packages/react-native/ReactCommon/react/bridging/React-bridging.podspec b/packages/react-native/ReactCommon/react/bridging/React-bridging.podspec
@@ -41,4 +41,6 @@ Pod::Spec.new do |s|
 
   add_rn_third_party_dependencies(s)
   add_rncore_dependency(s)
+
+  mark_as_react_native_build(s)
 end
diff --git a/packages/react-native/ReactCommon/react/cxxstableapi/React-cxxstableapi.podspec b/packages/react-native/ReactCommon/react/cxxstableapi/React-cxxstableapi.podspec
@@ -31,4 +31,6 @@ Pod::Spec.new do |s|
                                "DEFINES_MODULE" => "YES" }
 
   resolve_use_frameworks(s, header_mappings_dir: "../..", module_name: "React_cxxstableapi")
+
+  mark_as_react_native_build(s)
 end
diff --git a/packages/react-native/ReactCommon/react/debug/React-debug.podspec b/packages/react-native/ReactCommon/react/debug/React-debug.podspec
@@ -37,4 +37,6 @@ Pod::Spec.new do |s|
     ss.exclude_files        = "redbox/tests/**/*.{cpp,h}"
     ss.header_dir           = "react/debug/redbox"
   end
+
+  mark_as_react_native_build(s)
 end
diff --git a/packages/react-native/ReactCommon/react/featureflags/React-featureflags.podspec b/packages/react-native/ReactCommon/react/featureflags/React-featureflags.podspec
@@ -41,4 +41,6 @@ Pod::Spec.new do |s|
 
   add_rn_third_party_dependencies(s)
   add_rncore_dependency(s)
+
+  mark_as_react_native_build(s)
 end
diff --git a/...-native/ReactCommon/react/nativemodule/core/platform/ios/React-NativeModulesApple.podspec b/...-native/ReactCommon/react/nativemodule/core/platform/ios/React-NativeModulesApple.podspec
@@ -52,4 +52,6 @@ Pod::Spec.new do |s|
     depend_on_js_engine(s)
     add_rn_third_party_dependencies(s)
     add_rncore_dependency(s)
+
+  mark_as_react_native_build(s)
 end
diff --git a/...s/react-native/ReactCommon/react/nativemodule/defaults/React-defaultsnativemodule.podspec b/...s/react-native/ReactCommon/react/nativemodule/defaults/React-defaultsnativemodule.podspec
@@ -60,4 +60,6 @@ Pod::Spec.new do |s|
   add_dependency(s, "React-RCTFBReactNativeSpec")
   add_dependency(s, "React-featureflags")
   add_dependency(s, "React-featureflagsnativemodule")
+
+  mark_as_react_native_build(s)
 end
diff --git a/packages/react-native/ReactCommon/react/nativemodule/dom/React-domnativemodule.podspec b/packages/react-native/ReactCommon/react/nativemodule/dom/React-domnativemodule.podspec
@@ -58,4 +58,6 @@ Pod::Spec.new do |s|
   add_dependency(s, "React-runtimeexecutor", :additional_framework_paths => ["platform/ios"])
   add_dependency(s, "React-graphics", :additional_framework_paths => ["react/renderer/graphics/platform/ios"])
   add_dependency(s, "React-RCTFBReactNativeSpec")
+
+  mark_as_react_native_build(s)
 end
diff --git a/...native/ReactCommon/react/nativemodule/featureflags/React-featureflagsnativemodule.podspec b/...native/ReactCommon/react/nativemodule/featureflags/React-featureflagsnativemodule.podspec
@@ -50,4 +50,6 @@ Pod::Spec.new do |s|
   s.dependency "ReactCommon/turbomodule/core"
   s.dependency "React-RCTFBReactNativeSpec"
   s.dependency "React-featureflags"
+
+  mark_as_react_native_build(s)
 end
diff --git a/...tive/ReactCommon/react/nativemodule/idlecallbacks/React-idlecallbacksnativemodule.podspec b/...tive/ReactCommon/react/nativemodule/idlecallbacks/React-idlecallbacksnativemodule.podspec
@@ -53,4 +53,5 @@ Pod::Spec.new do |s|
   add_dependency(s, "React-RCTFBReactNativeSpec")
   add_dependency(s, "React-runtimeexecutor", :additional_framework_paths => ["platform/ios"])
 
+  mark_as_react_native_build(s)
 end
-Original file line number
+Diff line change
@@ Expand Up / @@ -103,4 +103,6 @@ Pod::Spec.new do |s| @@
         s.script_phase = script_phase
       end
+      mark_as_react_native_build(s)
     end