Add android native library build support (#1835)

.azure/azure-pipelines.ci.yml

@@ -283,6 +283,23 @@ stages:
       tls: openssl
       ubuntuVersion: 18.04
       extraBuildArgs: -DisableLogs -ToolchainFile cmake/toolchains/arm-pi-gnueabihf.toolchain.cmake
+
+  - template: ./templates/build-config-user.yml
+    parameters:
+      image: ubuntu-latest
+      platform: android
+      arch: arm64
+      tls: openssl
+      extraBuildArgs: -DisableLogs
+
+  - template: ./templates/build-config-user.yml
+    parameters:
+      image: ubuntu-latest
+      platform: android
+      arch: x64
+      tls: openssl
+      extraBuildArgs: -DisableLogs
+
   - template: ./templates/build-config-user.yml
     parameters:
       image: ubuntu-latest

CMakeLists.txt

@@ -488,6 +488,22 @@ if(QUIC_TLS STREQUAL "openssl")
                 set(OPENSSL_CONFIG_CMD ${CMAKE_CURRENT_SOURCE_DIR}/submodules/openssl/config)
             endif()
             list(APPEND OPENSSL_CONFIG_FLAGS -isysroot ${CMAKE_OSX_SYSROOT})
+        elseif(ANDROID)
+            message(STATUS "${ANDROID_ABI}")
+            if(ANDROID_ABI STREQUAL "arm64-v8a")
+                set(OPENSSL_BUILD_TYPE android-arm64)
+            elseif(ANDROID_ABI STREQUAL "armeabi-v7a")
+                set(OPENSSL_BUILD_TYPE android-arm)
+            elseif(ANDROID_ABI STREQUAL "x86")
+                set(OPENSSL_BUILD_TYPE android-x86)
+            elseif(ANDROID_ABI STREQUAL "x86_64")
+                set(OPENSSL_BUILD_TYPE android-x86_64)
+            else()
+                message(FATAL_ERROR "Unknown android abi type")
+            endif()
+            set(OPENSSL_CONFIG_CMD ${CMAKE_CURRENT_SOURCE_DIR}/submodules/openssl/Configure
+                ${OPENSSL_BUILD_TYPE}
+                -D__ANDROID_API__=29)
         else()
             set(OPENSSL_CONFIG_CMD ${CMAKE_CURRENT_SOURCE_DIR}/submodules/openssl/config
                 CC=${CMAKE_C_COMPILER} CXX=${CMAKE_CXX_COMPILER})

scripts/build.ps1

@@ -108,7 +108,7 @@ param (
     [string]$Arch = "",
 
     [Parameter(Mandatory = $false)]
-    [ValidateSet("uwp", "windows", "linux", "macos")] # For future expansion
+    [ValidateSet("uwp", "windows", "linux", "macos", "android")] # For future expansion
     [string]$Platform = "",
 
     [Parameter(Mandatory = $false)]
@@ -346,6 +346,20 @@ function CMake-Generate {
     if ($UseSystemOpenSSLCrypto) {
         $Arguments += " -DQUIC_USE_SYSTEM_LIBCRYPTO=on"
     }
+    if ($Platform -eq "android") {
+        $env:PATH = "$env:ANDROID_NDK_ROOT/toolchains/llvm/prebuilt/linux-x86_64/bin:$env:PATH"
+        switch ($Arch) {
+            "x86"   { $Arguments += " -DANDROID_ABI=x86"}
+            "x64"   { $Arguments += " -DANDROID_ABI=x86_64" }
+            "arm"   { $Arguments += " -DANDROID_ABI=armeabi-v7a" }
+            "arm64" { $Arguments += " -DANDROID_ABI=arm64-v8a" }
+        }
+        $Arguments += " -DANDROID_PLATFORM=android-29"
+        $NDK = $env:ANDROID_NDK_HOME
+        $NdkToolchainFile = "$NDK/build/cmake/android.toolchain.cmake"
+        $Arguments += " -DANDROID_NDK=$NDK"
+        $Arguments += " -DCMAKE_TOOLCHAIN_FILE=$NdkToolchainFile"
+    }
     $Arguments += " -DQUIC_LIBRARY_NAME=$LibraryName"
     $Arguments += " ../../.."
 

scripts/get-buildconfig.ps1

@@ -30,7 +30,7 @@ param (
     [string]$Arch = "",
 
     [Parameter(Mandatory = $false)]
-    [ValidateSet("uwp", "windows", "linux", "macos", "")] # For future expansion
+    [ValidateSet("uwp", "windows", "linux", "macos", "android", "")] # For future expansion
     [string]$Platform = "",
 
     [Parameter(Mandatory = $false)]
@@ -44,6 +44,15 @@ param (
 Set-StrictMode -Version 'Latest'
 $PSDefaultParameterValues['*:ErrorAction'] = 'Stop'
 
+if ($Platform -eq "android") {
+    if (!$IsLinux) {
+        Write-Error "Can only build android on linux"
+    }
+    if ($Arch -eq "") {
+        $Arch = "arm64"
+    }
+}
+
 if ("" -eq $Arch) {
     if ($IsMacOS) {
         $RunningArch = uname -m

src/inc/CMakeLists.txt

@@ -26,7 +26,7 @@ if(QUIC_ENABLE_LOGGING)
     endif()
 endif()
 
-if (NOT MSVC AND NOT APPLE)
+if (NOT MSVC AND NOT APPLE AND NOT ANDROID)
     find_library(ATOMIC NAMES atomic libatomic.so.1)
     if (ATOMIC)
         message(STATUS "Found libatomic: ${ATOMIC}")

src/platform/platform_posix.c

@@ -591,7 +591,7 @@ CxPlatThreadCreate(
 
 #endif // !CXPLAT_USE_CUSTOM_THREAD_CONTEXT
 
-#ifndef __GLIBC__
+#if !defined(__GLIBC__) && !defined(__ANDROID__)
     if (Status == QUIC_STATUS_SUCCESS) {
         if (Config->Flags & CXPLAT_THREAD_FLAG_SET_AFFINITIZE) {
             cpu_set_t CpuSet;
@@ -619,6 +619,7 @@ CxPlatSetCurrentThreadProcessorAffinity(
     _In_ uint16_t ProcessorIndex
     )
 {
+#ifndef __ANDROID__
     cpu_set_t CpuSet;
     pthread_t Thread = pthread_self();
     CPU_ZERO(&CpuSet);
@@ -632,6 +633,10 @@ CxPlatSetCurrentThreadProcessorAffinity(
     }
 
     return QUIC_STATUS_SUCCESS;
+#else
+    UNREFERENCED_PARAMETER(ProcessorIndex);
+    return QUIC_STATUS_SUCCESS;
+#endif
 }
 
 #elif defined(CX_PLATFORM_DARWIN)