[android] add an Android NDK Swift overlay

lib/ClangImporter/ClangIncludePaths.cpp

@@ -180,7 +180,7 @@ createClangArgs(const ASTContext &ctx, clang::driver::Driver &clangDriver) {
 
 static SmallVector<std::pair<std::string, std::string>, 2>
 getLibcFileMapping(ASTContext &ctx, StringRef modulemapFileName,
-                   std::optional<StringRef> maybeHeaderFileName,
+                   std::optional<ArrayRef<StringRef>> maybeHeaderFileNames,
                    const llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem> &vfs) {
   const llvm::Triple &triple = ctx.LangOpts.Target;
 
@@ -220,18 +220,20 @@ getLibcFileMapping(ASTContext &ctx, StringRef modulemapFileName,
   SmallVector<std::pair<std::string, std::string>, 2> vfsMappings{
       {std::string(injectedModuleMapPath), std::string(actualModuleMapPath)}};
 
-  if (maybeHeaderFileName) {
-    // TODO: remove the SwiftGlibc.h header and reference all Glibc headers
-    // directly from the modulemap.
-    Path actualHeaderPath = actualModuleMapPath;
-    llvm::sys::path::remove_filename(actualHeaderPath);
-    llvm::sys::path::append(actualHeaderPath, maybeHeaderFileName.value());
+  if (maybeHeaderFileNames) {
+    for (const auto &filename : *maybeHeaderFileNames) {
+      // TODO: remove the SwiftGlibc.h header and reference all Glibc headers
+      // directly from the modulemap.
+      Path actualHeaderPath = actualModuleMapPath;
+      llvm::sys::path::remove_filename(actualHeaderPath);
+      llvm::sys::path::append(actualHeaderPath, filename);
 
-    Path injectedHeaderPath(libcDir);
-    llvm::sys::path::append(injectedHeaderPath, maybeHeaderFileName.value());
+      Path injectedHeaderPath(libcDir);
+      llvm::sys::path::append(injectedHeaderPath, filename);
 
-    vfsMappings.push_back(
-        {std::string(injectedHeaderPath), std::string(actualHeaderPath)});
+      vfsMappings.push_back(
+          {std::string(injectedHeaderPath), std::string(actualHeaderPath)});
+    }
   }
 
   return vfsMappings;
@@ -552,9 +554,14 @@ ClangInvocationFileMapping swift::getClangInvocationFileMapping(
   } else if (triple.isMusl()) {
     libcFileMapping =
         getLibcFileMapping(ctx, "musl.modulemap", StringRef("SwiftMusl.h"), vfs);
+  } else if (triple.isAndroid()) {
+    // Android uses the android-specific module map that overlays the NDK.
+    StringRef headerFiles[] = {"SwiftAndroidNDK.h", "SwiftBionic.h"};
+    libcFileMapping =
+        getLibcFileMapping(ctx, "android.modulemap", headerFiles, vfs);
   } else if (triple.isOSGlibc() || triple.isOSOpenBSD() ||
-             triple.isOSFreeBSD() || triple.isAndroid()) {
-    // Android/BSD/Linux Mappings
+             triple.isOSFreeBSD()) {
+    // BSD/Linux Mappings
     libcFileMapping = getLibcFileMapping(ctx, "glibc.modulemap",
                                          StringRef("SwiftGlibc.h"), vfs);
 

stdlib/cmake/modules/AddSwiftStdlib.cmake

@@ -1757,6 +1757,9 @@ endfunction()
 # SWIFT_MODULE_DEPENDS_WASI
 #   Swift modules this library depends on when built for WASI.
 #
+# SWIFT_MODULE_DEPENDS_ANDROID
+#   Swift modules this library depends on when built for Android.
+#
 # FRAMEWORK_DEPENDS
 #   System frameworks this library depends on.
 #
@@ -1880,6 +1883,7 @@ function(add_swift_target_library name)
         SWIFT_COMPILE_FLAGS_XROS
         SWIFT_COMPILE_FLAGS_LINUX
         SWIFT_MODULE_DEPENDS
+        SWIFT_MODULE_DEPENDS_ANDROID
         SWIFT_MODULE_DEPENDS_CYGWIN
         SWIFT_MODULE_DEPENDS_FREEBSD
         SWIFT_MODULE_DEPENDS_FREESTANDING
@@ -2091,12 +2095,15 @@ function(add_swift_target_library name)
     elseif(sdk STREQUAL "OPENBSD")
       list(APPEND swiftlib_module_depends_flattened
            ${SWIFTLIB_SWIFT_MODULE_DEPENDS_OPENBSD})
-    elseif(sdk STREQUAL "LINUX" OR sdk STREQUAL "ANDROID")
+    elseif(sdk STREQUAL "LINUX")
       list(APPEND swiftlib_module_depends_flattened
            ${SWIFTLIB_SWIFT_MODULE_DEPENDS_LINUX})
     elseif(sdk STREQUAL "LINUX_STATIC")
       list(APPEND swiftlib_module_depends_flattened
           ${SWIFTLIB_SWIFT_MODULE_DEPENDS_LINUX_STATIC})
+    elseif(sdk STREQUAL "ANDROID")
+      list(APPEND swiftlib_module_depends_flattened
+           ${SWIFTLIB_SWIFT_MODULE_DEPENDS_ANDROID})
     elseif(sdk STREQUAL "CYGWIN")
       list(APPEND swiftlib_module_depends_flattened
            ${SWIFTLIB_SWIFT_MODULE_DEPENDS_CYGWIN})
@@ -2920,6 +2927,7 @@ function(add_swift_target_executable name)
     DEPENDS
     LINK_LIBRARIES
     SWIFT_MODULE_DEPENDS
+    SWIFT_MODULE_DEPENDS_ANDROID
     SWIFT_MODULE_DEPENDS_CYGWIN
     SWIFT_MODULE_DEPENDS_FREEBSD
     SWIFT_MODULE_DEPENDS_FREESTANDING
@@ -3030,12 +3038,15 @@ function(add_swift_target_executable name)
     elseif(sdk STREQUAL "OPENBSD")
       list(APPEND swiftexe_module_depends_flattened
         ${SWIFTEXE_TARGET_SWIFT_MODULE_DEPENDS_OPENBSD})
-    elseif(sdk STREQUAL "LINUX" OR sdk STREQUAL "ANDROID")
+    elseif(sdk STREQUAL "LINUX")
       list(APPEND swiftexe_module_depends_flattened
         ${SWIFTEXE_TARGET_SWIFT_MODULE_DEPENDS_LINUX})
     elseif(sdk STREQUAL "LINUX_STATIC")
       list(APPEND swiftexe_module_depends_flattened
         ${SWIFTEXE_TARGET_SWIFT_MODULE_DEPENDS_LINUX_STATIC})
+    elseif(sdk STREQUAL "ANDROID")
+      list(APPEND swiftexe_module_depends_flattened
+        ${SWIFTEXE_TARGET_SWIFT_MODULE_DEPENDS_ANDROID})
     elseif(sdk STREQUAL "CYGWIN")
       list(APPEND swiftexe_module_depends_flattened
         ${SWIFTEXE_TARGET_SWIFT_MODULE_DEPENDS_CYGWIN})

stdlib/private/RuntimeUnittest/CMakeLists.txt

@@ -8,6 +8,7 @@ add_swift_target_library(swiftRuntimeUnittest ${SWIFT_STDLIB_LIBRARY_BUILD_TYPES
   ExclusivityTests.cpp
 
   SWIFT_MODULE_DEPENDS StdlibUnittest
+  SWIFT_MODULE_DEPENDS_ANDROID Android
   SWIFT_MODULE_DEPENDS_LINUX Glibc
   SWIFT_MODULE_DEPENDS_FREEBSD Glibc
   SWIFT_MODULE_DEPENDS_OPENBSD Glibc

stdlib/private/StdlibCollectionUnittest/CMakeLists.txt

@@ -19,6 +19,7 @@ add_swift_target_library(swiftStdlibCollectionUnittest ${SWIFT_STDLIB_LIBRARY_BU
   WriteBackMutableSlice.swift
 
   SWIFT_MODULE_DEPENDS StdlibUnittest
+  SWIFT_MODULE_DEPENDS_ANDROID Android
   SWIFT_MODULE_DEPENDS_LINUX Glibc
   SWIFT_MODULE_DEPENDS_FREEBSD Glibc
   SWIFT_MODULE_DEPENDS_OPENBSD Glibc

stdlib/private/StdlibUnicodeUnittest/CMakeLists.txt

@@ -10,6 +10,7 @@ add_swift_target_library(swiftStdlibUnicodeUnittest ${SWIFT_STDLIB_LIBRARY_BUILD
   WordBreaking.swift
 
   SWIFT_MODULE_DEPENDS StdlibUnittest
+  SWIFT_MODULE_DEPENDS_ANDROID Android
   SWIFT_MODULE_DEPENDS_LINUX Glibc
   SWIFT_MODULE_DEPENDS_FREEBSD Glibc
   SWIFT_MODULE_DEPENDS_OPENBSD Glibc

stdlib/private/StdlibUnittest/CMakeLists.txt

@@ -62,6 +62,7 @@ add_swift_target_library(swiftStdlibUnittest ${SWIFT_STDLIB_LIBRARY_BUILD_TYPES}
   SWIFT_MODULE_DEPENDS_XROS ${swift_stdlib_unittest_darwin_dependencies}
   SWIFT_MODULE_DEPENDS_MACCATALYST ${swift_stdlib_unittest_darwin_dependencies}
   SWIFT_MODULE_DEPENDS_FREESTANDING "${SWIFT_FREESTANDING_TEST_DEPENDENCIES}"
+  SWIFT_MODULE_DEPENDS_ANDROID Android
   SWIFT_MODULE_DEPENDS_LINUX Glibc
   SWIFT_MODULE_DEPENDS_FREEBSD Glibc
   SWIFT_MODULE_DEPENDS_OPENBSD Glibc

stdlib/private/StdlibUnittest/RaceTest.swift

@@ -45,6 +45,8 @@ import Darwin
 import Glibc
 #elseif canImport(Musl)
 import Musl
+#elseif canImport(Android)
+import Android
 #elseif os(WASI)
 import WASILibc
 #elseif os(Windows)

stdlib/private/StdlibUnittest/StdlibCoreExtras.swift

@@ -18,6 +18,8 @@ import Darwin
 import Glibc
 #elseif canImport(Musl)
 import Musl
+#elseif canImport(Android)
+import Android
 #elseif os(WASI)
 import WASILibc
 #elseif os(Windows)

stdlib/private/StdlibUnittest/StdlibUnittest.swift

@@ -24,6 +24,8 @@ import Darwin
 import Glibc
 #elseif canImport(Musl)
 import Musl
+#elseif canImport(Android)
+import Android
 #elseif os(WASI)
 import WASILibc
 #elseif os(Windows)

stdlib/private/SwiftPrivate/CMakeLists.txt

@@ -27,6 +27,7 @@ add_swift_target_library(swiftSwiftPrivate ${SWIFT_STDLIB_LIBRARY_BUILD_TYPES} I
   SWIFT_MODULE_DEPENDS_WATCHOS ${swift_swiftprivate_darwin_depencencies}
   SWIFT_MODULE_DEPENDS_MACCATALYST ${swift_swiftprivate_darwin_depencencies}
   SWIFT_MODULE_DEPENDS_FREESTANDING "${SWIFT_FREESTANDING_TEST_DEPENDENCIES}"
+  SWIFT_MODULE_DEPENDS_ANDROID Android
   SWIFT_MODULE_DEPENDS_LINUX Glibc
   SWIFT_MODULE_DEPENDS_LINUX_STATIC Musl
   SWIFT_MODULE_DEPENDS_FREEBSD Glibc

stdlib/private/SwiftPrivate/IO.swift

@@ -23,6 +23,8 @@ import Darwin
 import Glibc
 #elseif canImport(Musl)
 import Musl
+#elseif canImport(Android)
+import Android
 #elseif canImport(WASILibc)
 import WASILibc
 #endif

stdlib/private/SwiftPrivateLibcExtras/CMakeLists.txt

@@ -38,6 +38,7 @@ add_swift_target_library(swiftSwiftPrivateLibcExtras ${SWIFT_STDLIB_LIBRARY_BUIL
   SWIFT_MODULE_DEPENDS_XROS ${swift_private_libc_extras_darwin_depencencies}
   SWIFT_MODULE_DEPENDS_MACCATALYST ${swift_private_libc_extras_darwin_depencencies}
   SWIFT_MODULE_DEPENDS_FREESTANDING "${SWIFT_FREESTANDING_TEST_DEPENDENCIES}"
+  SWIFT_MODULE_DEPENDS_ANDROID Android
   SWIFT_MODULE_DEPENDS_LINUX Glibc
   SWIFT_MODULE_DEPENDS_LINUX_STATIC Musl
   SWIFT_MODULE_DEPENDS_FREEBSD Glibc

stdlib/private/SwiftPrivateLibcExtras/Subprocess.swift

@@ -17,6 +17,8 @@ import Darwin
 import Glibc
 #elseif canImport(Musl)
 import Musl
+#elseif canImport(Android)
+import Android
 #elseif os(WASI)
 import WASILibc
 #elseif os(Windows)

stdlib/private/SwiftPrivateLibcExtras/SwiftPrivateLibcExtras.swift

@@ -17,6 +17,8 @@ import Darwin
 import Glibc
 #elseif canImport(Musl)
 import Musl
+#elseif canImport(Android)
+import Android
 #elseif os(WASI)
 import WASILibc
 #elseif os(Windows)

stdlib/private/SwiftPrivateThreadExtras/CMakeLists.txt

@@ -19,6 +19,7 @@ add_swift_target_library(swiftSwiftPrivateThreadExtras ${SWIFT_STDLIB_LIBRARY_BU
   SWIFT_MODULE_DEPENDS_XROS ${swift_private_thread_extras_darwin_depencencies}
   SWIFT_MODULE_DEPENDS_MACCATALYST ${swift_private_thread_extras_darwin_depencencies}
   SWIFT_MODULE_DEPENDS_FREESTANDING "${SWIFT_FREESTANDING_TEST_DEPENDENCIES}"
+  SWIFT_MODULE_DEPENDS_ANDROID Android
   SWIFT_MODULE_DEPENDS_LINUX Glibc
   SWIFT_MODULE_DEPENDS_LINUX_STATIC Musl
   SWIFT_MODULE_DEPENDS_FREEBSD Glibc

stdlib/private/SwiftPrivateThreadExtras/SwiftPrivateThreadExtras.swift

@@ -21,6 +21,8 @@ import Darwin
 import Glibc
 #elseif canImport(Musl)
 import Musl
+#elseif canImport(Android)
+import Android
 #elseif os(WASI)
 import WASILibc
 #elseif os(Windows)

stdlib/private/SwiftPrivateThreadExtras/ThreadBarriers.swift

@@ -16,6 +16,8 @@ import Darwin
 import Glibc
 #elseif canImport(Musl)
 import Musl
+#elseif canImport(Android)
+import Android
 #elseif os(WASI)
 import WASILibc
 #elseif os(Windows)

stdlib/private/SwiftReflectionTest/CMakeLists.txt

@@ -14,6 +14,7 @@ if (SWIFT_INCLUDE_TESTS AND SWIFT_BUILD_DYNAMIC_STDLIB)
     SWIFT_MODULE_DEPENDS_TVOS ${swift_reflection_test_darwin_depencencies}
     SWIFT_MODULE_DEPENDS_WATCHOS ${swift_reflection_test_darwin_depencencies}
     SWIFT_MODULE_DEPENDS_XROS ${swift_reflection_test_darwin_depencencies}
+    SWIFT_MODULE_DEPENDS_ANDROID Android
     SWIFT_MODULE_DEPENDS_LINUX Glibc
     SWIFT_MODULE_DEPENDS_LINUX_STATIC Musl
     SWIFT_MODULE_DEPENDS_FREEBSD Glibc

stdlib/private/SwiftReflectionTest/SwiftReflectionTest.swift

@@ -131,6 +131,8 @@ import SwiftShims
 import Glibc
 #elseif canImport(Musl)
 import Musl
+#elseif canImport(Android)
+import Android
 #endif
 
 let rtldDefault: UnsafeMutableRawPointer? = nil

stdlib/public/Concurrency/CMakeLists.txt

@@ -156,6 +156,7 @@ add_swift_target_library(swift_Concurrency ${SWIFT_STDLIB_LIBRARY_BUILD_TYPES} I
   ${SWIFT_RUNTIME_CONCURRENCY_C_SOURCES}
   ${SWIFT_RUNTIME_CONCURRENCY_SWIFT_SOURCES}
 
+  SWIFT_MODULE_DEPENDS_ANDROID Android
   SWIFT_MODULE_DEPENDS_LINUX Glibc
   SWIFT_MODULE_DEPENDS_FREEBSD Glibc
   SWIFT_MODULE_DEPENDS_OPENBSD Glibc

stdlib/public/Cxx/std/CMakeLists.txt

@@ -45,6 +45,7 @@ add_swift_target_library(swiftCxxStdlib STATIC NO_LINK_NAME IS_STDLIB IS_SWIFT_O
     SWIFT_MODULE_DEPENDS_WATCHOS ${swift_cxxstdlib_darwin_dependencies}
     SWIFT_MODULE_DEPENDS_XROS ${swift_cxxstdlib_darwin_dependencies}
     SWIFT_MODULE_DEPENDS_MACCATALYST ${swift_cxxstdlib_darwin_dependencies}
+    SWIFT_MODULE_DEPENDS_ANDROID Android
 
     SWIFT_COMPILE_FLAGS ${SWIFT_RUNTIME_SWIFT_COMPILE_FLAGS} ${SWIFT_STANDARD_LIBRARY_SWIFT_FLAGS}
     -cxx-interoperability-mode=default
@@ -56,7 +57,7 @@ add_swift_target_library(swiftCxxStdlib STATIC NO_LINK_NAME IS_STDLIB IS_SWIFT_O
     DEPLOYMENT_VERSION_OSX ${COMPATIBILITY_MINIMUM_DEPLOYMENT_VERSION_OSX}
 
     LINK_FLAGS "${SWIFT_RUNTIME_SWIFT_LINK_FLAGS}"
-    TARGET_SDKS ALL_APPLE_PLATFORMS LINUX WINDOWS
+    TARGET_SDKS ALL_APPLE_PLATFORMS LINUX WINDOWS ANDROID
     INSTALL_IN_COMPONENT compiler
     INSTALL_WITH_SHARED
     DEPENDS libstdcxx-modulemap libcxxshim_modulemap CxxStdlib-apinotes)

stdlib/public/Differentiation/CMakeLists.txt

@@ -42,6 +42,7 @@ add_swift_target_library(swift_Differentiation ${SWIFT_STDLIB_LIBRARY_BUILD_TYPE
   SWIFT_MODULE_DEPENDS_TVOS ${swiftDifferentiationDarwinDependencies}
   SWIFT_MODULE_DEPENDS_WATCHOS ${swiftDifferentiationDarwinDependencies}
   SWIFT_MODULE_DEPENDS_XROS ${swiftDifferentiationDarwinDependencies}
+  SWIFT_MODULE_DEPENDS_ANDROID Android
   SWIFT_MODULE_DEPENDS_LINUX Glibc
   SWIFT_MODULE_DEPENDS_LINUX_STATIC Musl
   SWIFT_MODULE_DEPENDS_FREEBSD Glibc

stdlib/public/Differentiation/TgmathDerivatives.swift.gyb

@@ -18,12 +18,14 @@ import Swift
   import Darwin.C.tgmath
 #elseif canImport(Musl)
   import Musl
-#elseif os(Linux) || os(FreeBSD) || os(OpenBSD) || os(PS4) || os(Android) || os(Cygwin) || os(Haiku)
+#elseif os(Linux) || os(FreeBSD) || os(OpenBSD) || os(PS4) || os(Cygwin) || os(Haiku)
   import Glibc
 #elseif os(WASI)
   import WASILibc
 #elseif os(Windows)
   import CRT
+#elseif canImport(Android)
+  import Android
 #else
 #error("Unsupported platform")
 #endif

stdlib/public/Distributed/CMakeLists.txt

@@ -34,6 +34,7 @@ add_swift_target_library(swiftDistributed ${SWIFT_STDLIB_LIBRARY_BUILD_TYPES} IS
   SWIFT_MODULE_DEPENDS_OSX ${swift_distributed_darwin_depencencies}
   SWIFT_MODULE_DEPENDS_TVOS ${swift_distributed_darwin_depencencies}
   SWIFT_MODULE_DEPENDS_WATCHOS ${swift_distributed_darwin_depencencies}
+  SWIFT_MODULE_DEPENDS_ANDROID Android
   SWIFT_MODULE_DEPENDS_LINUX Glibc
   SWIFT_MODULE_DEPENDS_FREEBSD Glibc
   SWIFT_MODULE_DEPENDS_OPENBSD Glibc

stdlib/public/Distributed/LocalTestingDistributedActorSystem.swift

@@ -18,6 +18,8 @@ import Darwin
 import Glibc
 #elseif canImport(Musl)
 import Musl
+#elseif canImport(Android)
+import Android
 #elseif os(Windows)
 import WinSDK
 #endif

stdlib/public/Platform/Android.swift

@@ -0,0 +1,13 @@
+//===----------------------------------------------------------------------===//
+//
+// This source file is part of the Swift.org open source project
+//
+// Copyright (c) 2014 - 2017 Apple Inc. and the Swift project authors
+// Licensed under Apache License v2.0 with Runtime Library Exception
+//
+// See https://swift.org/LICENSE.txt for license information
+// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
+//
+//===----------------------------------------------------------------------===//
+
+@_exported import SwiftAndroid // Clang module