[android] Get build scripts working natively, fix tests and install

The build scripts assume Android cross-compilation using the NDK, so avoid
that configuration if building on an Android host. Fix or disable some tests,
and don't install a glibc.modulemap without a native sysroot prefix.

Author: finagolfin

stdlib/public/Platform/CMakeLists.txt

@@ -99,9 +99,11 @@ foreach(sdk ${SWIFT_SDKS})
 
     list(APPEND glibc_modulemap_target_list ${glibc_modulemap_target})
 
-    # If this SDK is a target for a non-native host, create a native modulemap
-    # without a sysroot prefix. This is the one we'll install instead.
-    if(NOT "${SWIFT_SDK_${SWIFT_HOST_VARIANT_SDK}_ARCH_${arch}_PATH}" STREQUAL "/")
+    # If this SDK is a target for a non-native host, except if it's for Android
+    # with its own native sysroot, create a native modulemap without a sysroot
+    # prefix. This is the one we'll install instead.
+    if(NOT "${SWIFT_SDK_${SWIFT_HOST_VARIANT_SDK}_ARCH_${arch}_PATH}" STREQUAL "/" AND
+       NOT (${sdk} STREQUAL ANDROID AND NOT "${SWIFT_ANDROID_NATIVE_SYSROOT}" STREQUAL ""))
       set(glibc_sysroot_relative_modulemap_out "${module_dir}/sysroot-relative-modulemaps/glibc.modulemap")
 
       string(REPLACE "${SWIFT_SDK_${SWIFT_HOST_VARIANT_SDK}_ARCH_${arch}_PATH}"

test/ClangImporter/Dispatch_test.swift

@@ -2,6 +2,7 @@
 
 // REQUIRES: libdispatch
 // UNSUPPORTED: OS=linux-gnu
+// UNSUPPORTED: OS=linux-android
 
 import Dispatch
 

test/Sanitizers/asan_recover.swift

@@ -30,7 +30,7 @@
 
 // FIXME: We need this so we can flush stdout but this won't
 // work on other Platforms (e.g. Windows).
-#if os(Linux)
+#if canImport(Glibc)
     import Glibc
 #else
     import Darwin.C

test/stdlib/Dispatch.swift

@@ -2,6 +2,7 @@
 // REQUIRES: executable_test
 // REQUIRES: libdispatch
 // UNSUPPORTED: OS=linux-gnu
+// UNSUPPORTED: OS=linux-android
 
 import Dispatch
 import StdlibUnittest

test/stdlib/DispatchTypes.swift

@@ -2,6 +2,7 @@
 
 // REQUIRES: libdispatch
 // UNSUPPORTED: OS=linux-gnu
+// UNSUPPORTED: OS=linux-android
 
 import Dispatch
 

utils/build-script

@@ -321,7 +321,11 @@ def apply_default_arguments(toolchain, args):
     android_tgts = [tgt for tgt in args.stdlib_deployment_targets
                     if StdlibDeploymentTarget.Android.contains(tgt)]
     if not args.android and len(android_tgts) > 0:
-        args.android = True
+        # If building natively on an Android host, avoid the NDK
+        # cross-compilation configuration.
+        if not StdlibDeploymentTarget.Android.contains(StdlibDeploymentTarget
+                                                       .host_target().name):
+            args.android = True
         args.build_android = False
 
     # Include the Darwin supported architectures in the CMake options.
@@ -657,6 +661,10 @@ class BuildScriptInvocation(object):
                 "--android-icu-i18n-include", args.android_icu_i18n_include,
                 "--android-icu-data", args.android_icu_data,
             ]
+        # If building natively on an Android host, only pass the API level.
+        if StdlibDeploymentTarget.Android.contains(StdlibDeploymentTarget
+                                                   .host_target().name):
+            impl_args += ["--android-api-level", args.android_api_level]
         if args.android_deploy_device_path:
             impl_args += [
                 "--android-deploy-device-path",

utils/build-script-impl

@@ -460,6 +460,10 @@ function set_build_options_for_host() {
     SWIFT_HOST_VARIANT_ARCH=$architecture
 
     case ${host} in
+        android-aarch64)
+            SWIFT_HOST_TRIPLE="aarch64-unknown-linux-android"
+            llvm_target_arch="AArch64"
+            ;;
         linux-armv6)
             SWIFT_HOST_TRIPLE="armv6-unknown-linux-gnueabihf"
             llvm_target_arch="ARM"
@@ -1553,12 +1557,18 @@ for host in "${ALL_HOSTS[@]}"; do
 
             swift)
 
+                if [[ "${ANDROID_API_LEVEL}" ]]; then
+                    cmake_options=(
+                        "${cmake_options[@]}"
+                        -DSWIFT_ANDROID_API_LEVEL:STRING="${ANDROID_API_LEVEL}"
+                    )
+                fi
+
                 if [[ ! "${SKIP_BUILD_ANDROID}" ]]; then
                     cmake_options=(
                         "${cmake_options[@]}"
                         -DSWIFT_ANDROID_NDK_PATH:STRING="${ANDROID_NDK}"
                         -DSWIFT_ANDROID_NDK_GCC_VERSION:STRING="${ANDROID_NDK_GCC_VERSION}"
-                        -DSWIFT_ANDROID_API_LEVEL:STRING="${ANDROID_API_LEVEL}"
                         -DSWIFT_ANDROID_${ANDROID_ARCH}_ICU_UC:STRING="${ANDROID_ICU_UC}"
                         -DSWIFT_ANDROID_${ANDROID_ARCH}_ICU_UC_INCLUDE:STRING="${ANDROID_ICU_UC_INCLUDE}"
                         -DSWIFT_ANDROID_${ANDROID_ARCH}_ICU_I18N:STRING="${ANDROID_ICU_I18N}"
@@ -2192,6 +2202,8 @@ for host in "${ALL_HOSTS[@]}"; do
               HOST_CXX_HEADERS_DIR="$HOST_CXX_DIR/../../usr/include/c++"
             elif [[ "$(uname -s)" == "Haiku" ]] ; then
               HOST_CXX_HEADERS_DIR="/boot/system/develop/headers/c++"
+            elif [[ "${ANDROID_DATA}" ]] ; then
+              HOST_CXX_HEADERS_DIR="$PREFIX/include/c++"
             else # Linux
               HOST_CXX_HEADERS_DIR="/usr/include/c++"
             fi

utils/build_swift/build_swift/driver_arguments.py

@@ -223,7 +223,11 @@ def _apply_default_arguments(args):
         args.test_watchos_simulator = False
 
     if not args.build_android:
-        args.test_android = False
+        # If building natively on an Android host, allow running the test suite
+        # without the NDK config.
+        if not StdlibDeploymentTarget.Android.contains(StdlibDeploymentTarget
+                                                       .host_target().name):
+            args.test_android = False
         args.test_android_host = False
 
     if not args.test_android: