Android API 23

.github/workflows/pull_request.yml

@@ -21,3 +21,190 @@ jobs:
           name: docker-logs
           path: |
             *.log
+
+   android-build:
+     name: Android ${{ matrix.build-type }} ${{ matrix.swift-version }} ${{ matrix.arch }} ${{ matrix.runner }} (compiler=${{ matrix.build-compiler }})
+     strategy:
+       fail-fast: false
+       matrix:
+         include:
+           - swift-version: 'tag:swift-DEVELOPMENT-SNAPSHOT-2025-10-16-a'
+             build-type: 'docker'
+             runner: 'ubuntu-24.04'
+           - swift-version: 'tag:swift-DEVELOPMENT-SNAPSHOT-2025-10-16-a'
+             build-type: 'local'
+             runner: 'ubuntu-24.04'
+     runs-on: ${{ matrix.runner }}
+     # 16 hour timeout
+     timeout-minutes: 960
+     steps:
+      - name: Free Disk Space
+        if: ${{ matrix.runner != 'self-hosted' }}
+        run: |
+          df -h
+          # brings available space from 25G to 32G
+          # otherwise we sometimes run out of space during the build
+          sudo rm -rf /usr/share/miniconda /usr/share/az* /usr/share/glade* /usr/local/share/chromium /usr/local/share/powershell /usr/share/dotnet /opt/ghc /opt/hostedtoolcache /usr/local/graalvm/ /usr/local/.ghcup/ /usr/local/lib/node_modules /usr/local/share/boost
+          sudo docker image prune --all --force
+          sudo docker builder prune -a
+          df -h
+      - name: Setup
+        id: config
+        run: |
+          # these variabes are used by build-docker and build-local
+          # to determine which Swift version to build for
+          echo "SWIFT_VERSION=${{ matrix.swift-version }}" >> $GITHUB_ENV
+          # pass the build-compiler matrix through to the build script
+          echo "BUILD_COMPILER=${{ matrix.build-compiler }}" >> $GITHUB_ENV
+          echo "TARGET_ARCHS=${{ matrix.arch }}" >> $GITHUB_ENV
+          echo "WORKDIR=${{ runner.temp }}/swift-android-sdk" >> $GITHUB_ENV
+      - name: Checkout repository
+        uses: actions/checkout@v4
+      - name: Build Android SDK (Local)
+        if: ${{ matrix.build-type == 'local' }}
+        working-directory: swift-ci/sdks/android
+        run: |
+          sudo apt install -q patchelf build-essential cmake ninja-build python3 golang git gnupg2 libcurl4-openssl-dev libedit-dev libicu-dev libncurses5-dev libpython3-dev libsqlite3-dev libxml2-dev rsync uuid-dev uuid-runtime tzdata curl unzip
+          ./build-local ${SWIFT_VERSION} ${WORKDIR}
+      - name: Build Android SDK (Docker)
+        if: ${{ matrix.build-type == 'docker' }}
+        working-directory: swift-ci/sdks/android
+        run: |
+          ./build-docker ${SWIFT_VERSION} ${WORKDIR}
+      - name: Install Host Toolchain
+        if: ${{ matrix.build-type == 'docker' }}
+        working-directory: swift-ci/sdks/android
+        run: |
+          # when building in a Docker container, we don't have a local host toolchain,
+          # but we need one in order to run the SDK validation tests, so we install it now
+          HOST_OS=ubuntu$(lsb_release -sr)
+          source ./scripts/toolchain-vars.sh
+          mkdir -p ${WORKDIR}/host-toolchain
+          ./scripts/install-swift.sh ${WORKDIR}/host-toolchain/$SWIFT_BASE/usr
+          ls ${WORKDIR}/host-toolchain
+          ${WORKDIR}/host-toolchain/*/usr/bin/swift --version
+      - name: Get artifact info
+        id: info
+        shell: bash
+        run: |
+          set -ex
+          SWIFT_ROOT=$(dirname ${WORKDIR}/host-toolchain/*/usr)
+          echo "swift-root=${SWIFT_ROOT}" >> $GITHUB_OUTPUT
+          echo "swift-path=${SWIFT_ROOT}/usr/bin/swift" >> $GITHUB_OUTPUT
+
+          ARTIFACT_PATH=$(realpath ${WORKDIR}/products/*.artifactbundle.tar.gz)
+          echo "artifact-path=${ARTIFACT_PATH}" >> $GITHUB_OUTPUT
+          echo "sdk-id=x86_64-unknown-linux-android23" >> $GITHUB_OUTPUT
+
+          ARTIFACT_EXT=".artifactbundle.tar.gz"
+          ARTIFACT_NAME="$(basename ${ARTIFACT_PATH} ${ARTIFACT_EXT})"
+          # depending on whether we are building locally or in a container, add a maker to the name
+          if [[ "${{ matrix.build-type }}" == 'local' ]]; then
+            ARTIFACT_NAME="${ARTIFACT_NAME}-local"
+          fi
+          if [[ "${{ matrix.build-compiler }}" == '1' ]]; then
+            ARTIFACT_NAME="${ARTIFACT_NAME}-hostbuild"
+          fi
+          # artifacts need a unique name so we suffix with the matrix arch(s)
+          if [[ ! -z "${{ matrix.arch }}" ]]; then
+            ARTIFACT_NAME="${ARTIFACT_NAME}-$(echo ${{ matrix.arch }} | tr ',' '-')"
+          fi
+          ARTIFACT_NAME="${ARTIFACT_NAME}${ARTIFACT_EXT}"
+
+          # There is no way to prevent even a single-file artifact from being zipped:
+          # https://github.com/actions/upload-artifact?tab=readme-ov-file#zip-archives
+          # so the actual artifact download will look like:
+          # swift-6.1-RELEASE_android-0.1-x86_64.artifactbundle.tar.gz.zip
+          echo "artifact-name=${ARTIFACT_NAME}" >> $GITHUB_OUTPUT
+      - name: Upload SDK artifactbundle
+        uses: actions/upload-artifact@v4
+        with:
+          compression-level: 0
+          name: ${{ steps.info.outputs.artifact-name }}
+          path: ${{ steps.info.outputs.artifact-path }}
+      - name: Cleanup
+        if: ${{ matrix.runner != 'self-hosted' }}
+        run: |
+          # need to free up some space or else when installing we get: No space left on device
+          df -h
+          rm -rf ${WORKDIR}/{build,source}
+          sudo docker image prune --all --force
+          sudo docker builder prune -a
+          df -h
+      - name: Install artifactbundle
+        if: ${{ matrix.runner != 'self-hosted' }}
+        shell: bash
+        run: |
+          set -ex
+          ${{ steps.info.outputs.swift-path }} sdk install ${{ steps.info.outputs.artifact-path }}
+          ${{ steps.info.outputs.swift-path }} sdk configure --show-configuration $(${{ steps.info.outputs.swift-path }} sdk list | head -n 1) ${{ steps.info.outputs.sdk-id }}
+          # recent releases require that ANDROID_NDK_ROOT *not* be set
+          # see https://github.com/swiftlang/swift-driver/pull/1879
+          echo "ANDROID_NDK_ROOT=" >> $GITHUB_ENV
+
+      - name: Create Demo Project
+        if: ${{ matrix.runner != 'self-hosted' }}
+        run: |
+          cd ${{ runner.temp }}
+          mkdir DemoProject
+          cd DemoProject
+          ${{ steps.info.outputs.swift-path }} --version
+          ${{ steps.info.outputs.swift-path }} package init
+          echo 'import Foundation' >> Sources/DemoProject/DemoProject.swift
+          echo 'import FoundationEssentials' >> Sources/DemoProject/DemoProject.swift
+          echo 'import FoundationXML' >> Sources/DemoProject/DemoProject.swift
+          echo 'import FoundationNetworking' >> Sources/DemoProject/DemoProject.swift
+          echo 'import Dispatch' >> Sources/DemoProject/DemoProject.swift
+          echo 'import Android' >> Sources/DemoProject/DemoProject.swift
+      - name: Test Demo Project on Android
+        uses: skiptools/swift-android-action@main
+        if: ${{ matrix.runner != 'self-hosted' }}
+        with:
+          # only test for the complete arch SDK build to speed up CI
+          #run-tests: ${{ matrix.arch == '' }}
+          package-path: ${{ runner.temp }}/DemoProject
+          installed-sdk: ${{ steps.info.outputs.sdk-id }}
+          installed-swift: ${{ steps.info.outputs.swift-root }}
+
+      - name: Checkout swift-algorithms
+        if: ${{ matrix.runner != 'self-hosted' }}
+        uses: actions/checkout@v4
+        with:
+          repository: apple/swift-algorithms
+          path: swift-algorithms
+      - name: Test swift-algorithms
+        if: ${{ matrix.runner != 'self-hosted' }}
+        uses: skiptools/swift-android-action@main
+        with:
+          package-path: swift-algorithms
+          installed-sdk: ${{ steps.info.outputs.sdk-id }}
+          installed-swift: ${{ steps.info.outputs.swift-root }}
+
+      - name: Checkout swift-system
+        if: ${{ matrix.runner != 'self-hosted' }}
+        uses: actions/checkout@v4
+        with:
+          repository: apple/swift-system
+          path: swift-system
+      - name: Test swift-system
+        if: ${{ matrix.runner != 'self-hosted' }}
+        uses: skiptools/swift-android-action@main
+        with:
+          package-path: swift-system
+          installed-sdk: ${{ steps.info.outputs.sdk-id }}
+          installed-swift: ${{ steps.info.outputs.swift-root }}
+
+      - name: Checkout swift-crypto
+        if: ${{ matrix.runner != 'self-hosted' }}
+        uses: actions/checkout@v4
+        with:
+          repository: apple/swift-crypto
+          path: swift-crypto
+      - name: Test swift-crypto
+        if: ${{ matrix.runner != 'self-hosted' }}
+        uses: skiptools/swift-android-action@main
+        with:
+          package-path: swift-crypto
+          installed-sdk: ${{ steps.info.outputs.sdk-id }}
+          installed-swift: ${{ steps.info.outputs.swift-root }}
+

swift-ci/sdks/android/README.md

@@ -41,7 +41,7 @@ which will build the sources for each of the specified
 architectures and then combines the SDKs into a single
 artifactbundle with targetTriples for each of the supported
 architectures (`aarch64`, `x86_64`, `aarmv7`)
-and Android API levels (28-35).
+and Android API levels (24-35).
 
 ## Specifying Architectures
 

swift-ci/sdks/android/build-docker

@@ -18,7 +18,6 @@
 TARGET_ARCHS=${TARGET_ARCHS:-aarch64,x86_64,armv7}
 
 ANDROID_NDK_VERSION=android-ndk-r27d
-ANDROID_API=28
 
 BASEPATH=$(dirname $(realpath $0))
 cd ${BASEPATH}
@@ -39,16 +38,6 @@ source ./scripts/toolchain-vars.sh
 # Check-out and patch the sources
 ./scripts/fetch-source.sh --source-dir ${WORKDIR}/source
 
-# This `git grep` invocation in a trunk test fails in our Docker for some
-# reason, so just turn it into a plain `grep` again.
-perl -pi -e 's:"git",:#:' ${WORKDIR}/source/swift-project/swift/test/Misc/verify-swift-feature-testing.test-sh
-
-# Work around swiftlang/swift-driver#1822 for now
-perl -pi -g -we "s#(call rm ... \".\{LIBDISPATCH_BUILD_DIR\}\"\n(\s+)fi\n)#\1\2if [[ -d \"\\\${ANDROID_NDK}\" ]]; then call ln -sf \"\\\${SWIFT_BUILD_PATH}/lib/swift\" \"\\\${ANDROID_NDK}/toolchains/llvm/prebuilt/linux-x86_64/sysroot/usr/lib\"; fi#" ${WORKDIR}/source/swift-project/swift/utils/build-script-impl
-
-# disable backtrace() for Android (needs either API33+ or libandroid-execinfo, or to manually add in backtrace backport)
-perl -pi -e 's;os\(Android\);os\(AndroidDISABLED\);g' ${WORKDIR}/source/swift-project/swift-testing/Sources/Testing/SourceAttribution/Backtrace.swift
-
 mkdir -p ${WORKDIR}/products
 chmod ugo+rwx ${WORKDIR}/products
 
@@ -70,6 +59,5 @@ $DOCKER run -i --rm \
             --products-dir "/products" \
             --host-toolchain "/usr/local/swift" \
             --build-compiler "${BUILD_COMPILER}" \
-            --android-api "${ANDROID_API}" \
             --ndk-home "/usr/local/ndk/${ANDROID_NDK_VERSION}" \
             --archs "${TARGET_ARCHS}"

swift-ci/sdks/android/build-local

@@ -18,7 +18,6 @@
 TARGET_ARCHS=${TARGET_ARCHS:-aarch64,x86_64,armv7}
 
 ANDROID_NDK_VERSION=android-ndk-r27d
-ANDROID_API=28
 
 BASEPATH=$(dirname $(realpath $0))
 cd ${BASEPATH}
@@ -61,15 +60,6 @@ fi
 
 # Check-out and patch the sources
 ./scripts/fetch-source.sh --source-dir ${WORKDIR}/source
-# This `git grep` invocation in a trunk test fails in our Docker for some
-# reason, so just turn it into a plain `grep` again.
-perl -pi -e 's:"git",:#:' ${WORKDIR}/source/swift-project/swift/test/Misc/verify-swift-feature-testing.test-sh
-
-# Work around swiftlang/swift-driver#1822 for now
-perl -pi -g -we "s#(call rm ... \".\{LIBDISPATCH_BUILD_DIR\}\"\n(\s+)fi\n)#\1\2if [[ -d \"\\\${ANDROID_NDK}\" ]]; then call ln -sf \"\\\${SWIFT_BUILD_PATH}/lib/swift\" \"\\\${ANDROID_NDK}/toolchains/llvm/prebuilt/linux-x86_64/sysroot/usr/lib\"; fi#" ${WORKDIR}/source/swift-project/swift/utils/build-script-impl
-
-# disable backtrace() for Android (needs either API33+ or libandroid-execinfo, or to manually add in backtrace backport)
-perl -pi -e 's;os\(Android\);os\(AndroidDISABLED\);g' ${WORKDIR}/source/swift-project/swift-testing/Sources/Testing/SourceAttribution/Backtrace.swift
 
 mkdir -p ${WORKDIR}/products
 
@@ -79,6 +69,5 @@ mkdir -p ${WORKDIR}/products
     --build-dir "${WORKDIR}/build" \
     --build-compiler "${BUILD_COMPILER}" \
     --host-toolchain "${HOST_TOOLCHAIN}" \
-    --android-api "${ANDROID_API}" \
     --ndk-home "${ANDROID_NDK_HOME}" \
     --archs "${TARGET_ARCHS}"

swift-ci/sdks/android/scripts/build.sh

@@ -128,7 +128,7 @@ declare_package boringssl "boringssl" "OpenSSL AND ISC AND MIT" \
 android_sdk_version=0.1
 sdk_name=
 archs=aarch64,armv7,x86_64
-android_api=28
+android_api=23
 build_type=Release
 parallel_jobs=$(($(nproc --all) + 2))
 source_dir=
@@ -320,12 +320,12 @@ for arch in $archs; do
             -DCMAKE_TOOLCHAIN_FILE=$ndk_home/build/cmake/android.toolchain.cmake \
             -DCMAKE_BUILD_TYPE=$build_type \
             -DCMAKE_EXTRA_LINK_FLAGS="-rtlib=compiler-rt -unwindlib=libunwind -stdlib=libc++ -fuse-ld=lld -lc++ -lc++abi -Wl,-z,max-page-size=16384" \
-            -DCMAKE_BUILD_TYPE=$build_type \
             -DCMAKE_INSTALL_PREFIX=$sdk_root/usr \
             -DLIBXML2_WITH_PYTHON=NO \
             -DLIBXML2_WITH_ICU=NO \
             -DLIBXML2_WITH_ICONV=NO \
             -DLIBXML2_WITH_LZMA=NO \
+            -DLIBXML2_WITH_TESTS=OFF \
             -DBUILD_SHARED_LIBS=OFF \
             -DBUILD_STATIC_LIBS=ON
 

swift-ci/sdks/android/scripts/fetch-source.sh

@@ -161,3 +161,26 @@ pushd boringssl >/dev/null 2>&1
 git checkout ${BORINGSSL_VERSION}
 popd >/dev/null 2>&1
 groupend
+
+groupstart "Patchin Sources"
+# This `git grep` invocation in a trunk test fails in our Docker for some
+# reason, so just turn it into a plain `grep` again.
+perl -pi -e 's:"git",:#:' swift-project/swift/test/Misc/verify-swift-feature-testing.test-sh
+
+# Work around swiftlang/swift-driver#1822 for now
+perl -pi -g -we "s#(call rm ... \".\{LIBDISPATCH_BUILD_DIR\}\"\n(\s+)fi\n)#\1\2if [[ -d \"\\\${ANDROID_NDK}\" ]]; then call ln -sf \"\\\${SWIFT_BUILD_PATH}/lib/swift\" \"\\\${ANDROID_NDK}/toolchains/llvm/prebuilt/linux-x86_64/sysroot/usr/lib\"; fi#" swift-project/swift/utils/build-script-impl
+
+# disable backtrace() for Android (needs either API33+ or libandroid-execinfo, or to manually add in backtrace backport)
+perl -pi -e 's;os\(Android\);os\(AndroidDISABLED\);g' swift-project/swift-testing/Sources/Testing/SourceAttribution/Backtrace.swift
+
+# Disable posix_spawnattr_* calls for Android API 24
+perl -pi -e 's;try _throwIfPosixError\(posix_spawnattr_init;//try _throwIfPosixError\(posix_spawnattr_init;g' swift-project/swift-corelibs-foundation/Sources/Foundation/Process.swift
+perl -pi -e 's;try _throwIfPosixError\(posix_spawnattr_setflags;//try _throwIfPosixError\(posix_spawnattr_setflags;g' swift-project/swift-corelibs-foundation/Sources/Foundation/Process.swift
+perl -pi -e 's;posix_spawnattr_destroy;//posix_spawnattr_destroy;g' swift-project/swift-corelibs-foundation/Sources/Foundation/Process.swift
+
+# fix getgrgid_r and getgrnam_r missing from Android API 23
+perl -pi -e 's;getgrgid_r;{ _, _, _, _, _ in 0 };g' swift-project/swift-foundation/Sources/FoundationEssentials/Platform.swift
+perl -pi -e 's;getgrnam_r;{ _, _, _, _, _ in 0 };g' swift-project/swift-foundation/Sources/FoundationEssentials/Platform.swift
+
+groupend
+

swift-ci/sdks/android/scripts/toolchain-vars.sh

@@ -49,8 +49,8 @@ elif [[ $SWIFT_VERSION == scheme:* ]]; then
     echo "Building $SWIFT_VERSION with prebuilt Swift $RELEASE_TAG compiler"
     BUILD_COMPILER=yes
     echo "Branch scheme builds always build the Swift compiler from source and take much longer."
-else
-    echo "Invalid Swift version=${SWIFT_VERSION}"
+else 
+    echo "Invalid SWIFT_VERSION: $SWIFT_VERSION"
     exit 1
 fi