swift-android-sdk · marcprux · Nov 1, 2025 · Mar 31, 2025 · Apr 7, 2025 · Apr 15, 2025
diff --git a/swift-ci/sdks/android/README.md b/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 (23-35).
 
 ## Specifying Architectures
 

diff --git a/swift-ci/sdks/android/build-docker b/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 "${TARGET_ARCHS}"
diff --git a/swift-ci/sdks/android/build-local b/swift-ci/sdks/android/build-local
@@ -18,7 +18,6 @@
 TARGET_ARCHS=${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 "${TARGET_ARCHS}"
diff --git a/swift-ci/sdks/android/scripts/build.sh b/swift-ci/sdks/android/scripts/build.sh
@@ -128,7 +128,7 @@ declare_package boringssl "boringssl" "OpenSSL AND ISC AND MIT" \
 android_sdk_version=0.1
 sdk_name=
 archs=aarch64,armv7,x86_64
-android_api=28
+android_api=23
 build_type=Release
 parallel_jobs=$(($(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
 

diff --git a/swift-ci/sdks/android/scripts/fetch-source.sh b/swift-ci/sdks/android/scripts/fetch-source.sh
@@ -161,3 +161,32 @@ pushd boringssl >/dev/null 2>&1
 git checkout ${BORINGSSL_VERSION}
 popd >/dev/null 2>&1
 groupend
+
+groupstart "Patching Sources"
+pushd swift-project >/dev/null
+
+# 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/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/utils/build-script-impl
+
+# fix optional result value in backtrace() call
+perl -pi -e 's;.init\(clamping: addresses.count\)\)\);.init\(clamping: addresses.count\)\) ?? 0\);g' swift-testing/Sources/Testing/SourceAttribution/Backtrace.swift
+
+# disable backtrace() for Android (needs either API33+ or libandroid-execinfo, or to manually add in backtrace backport); will be fixed post 6.2 (in which case only the above patch is needed)
+perl -pi -e 's;os\(Android\);os\(AndroidDISABLED\);g' swift-testing/Sources/Testing/SourceAttribution/Backtrace.swift
+
+
+# Disable posix_spawnattr_* calls for Android API 23
+perl -pi -e 's;try _throwIfPosixError\(posix_spawnattr_init;throw NSError\(domain: NSPOSIXErrorDomain, code: .init\(ENOEXEC\), userInfo: [ NSLocalizedFailureReasonErrorKey: "Process unavailable on Android" ]\) //try _throwIfPosixError\(posix_spawnattr_init;g' swift-corelibs-foundation/Sources/Foundation/Process.swift
+perl -pi -e 's;try _throwIfPosixError\(posix_spawnattr_setflags;//try _throwIfPosixError\(posix_spawnattr_setflags;g' swift-corelibs-foundation/Sources/Foundation/Process.swift
+perl -pi -e 's;posix_spawnattr_destroy;//posix_spawnattr_destroy;g' swift-corelibs-foundation/Sources/Foundation/Process.swift
+
+# Stub out getgrgid_r and getgrnam_r missing from Android API 23
+perl -pi -e 's;getgrgid_r|getgrnam_r;{ _, _, _, _, _ in 0 };g' swift-foundation/Sources/FoundationEssentials/Platform.swift
+
+popd >/dev/null 2>&1
+groupend
+
diff --git a/swift-ci/sdks/android/scripts/toolchain-vars.sh b/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