Bug 1690973 - Add compiler-rt tasks for android. r=firefox-build-system-reviewers,andi

The necessary flags are somewhat different from what we currently use in
build-clang.py, but work.

Differential Revision: https://phabricator.services.mozilla.com/D127932

taskcluster/ci/config.yml

@@ -122,6 +122,7 @@ treeherder:
         'Ub18': 'Packages for Ubuntu 18.04'
         'Ub20': 'Packages for Ubuntu 20.04'
         'I': 'Docker Image Builds'
+        'TA': 'Toolchain builds for Android'
         'TL': 'Toolchain builds for Linux 64-bits'
         'TL32': 'Toolchain builds for Linux 32-bits'
         'TM': 'Toolchain builds for OSX'

taskcluster/ci/toolchain/compiler-rt.yml

@@ -11,6 +11,74 @@ job-defaults:
         script: build-compiler-rt.sh
         toolchain-artifact: public/build/compiler-rt.tar.zst
 
+android-aarch64-compiler-rt-12:
+    description: "android aarch64 Compiler-rt for Clang 12 toolchain build"
+    treeherder:
+        symbol: TA(aarch64-crt-12)
+    run:
+        arguments:
+            - aarch64-linux-android
+            - 'build/build-clang/find_symbolizer_linux_clang_10.patch'
+        resources:
+            - 'build/build-clang/find_symbolizer_linux_clang_10.patch'
+    fetches:
+        fetch:
+            - clang-12
+        toolchain:
+            - linux64-clang-12
+            - linux64-android-ndk-linux-repack
+
+android-arm-compiler-rt-12:
+    description: "android arm Compiler-rt for Clang 12 toolchain build"
+    treeherder:
+        symbol: TA(arm-crt-12)
+    run:
+        arguments:
+            - armv7-linux-android
+            - 'build/build-clang/find_symbolizer_linux_clang_10.patch'
+        resources:
+            - 'build/build-clang/find_symbolizer_linux_clang_10.patch'
+    fetches:
+        fetch:
+            - clang-12
+        toolchain:
+            - linux64-clang-12
+            - linux64-android-ndk-linux-repack
+
+android-x86-compiler-rt-12:
+    description: "android x86 Compiler-rt for Clang 12 toolchain build"
+    treeherder:
+        symbol: TA(x86-crt-12)
+    run:
+        arguments:
+            - i686-linux-android
+            - 'build/build-clang/find_symbolizer_linux_clang_10.patch'
+        resources:
+            - 'build/build-clang/find_symbolizer_linux_clang_10.patch'
+    fetches:
+        fetch:
+            - clang-12
+        toolchain:
+            - linux64-clang-12
+            - linux64-android-ndk-linux-repack
+
+android-x64-compiler-rt-12:
+    description: "android x64 Compiler-rt for Clang 12 toolchain build"
+    treeherder:
+        symbol: TA(x64-crt-12)
+    run:
+        arguments:
+            - x86_64-linux-android
+            - 'build/build-clang/find_symbolizer_linux_clang_10.patch'
+        resources:
+            - 'build/build-clang/find_symbolizer_linux_clang_10.patch'
+    fetches:
+        fetch:
+            - clang-12
+        toolchain:
+            - linux64-clang-12
+            - linux64-android-ndk-linux-repack
+
 linux64-aarch64-compiler-rt-12:
     description: "Linux aarch64 Compiler-rt for Clang 12 toolchain build"
     treeherder:

taskcluster/scripts/misc/build-compiler-rt.sh

@@ -23,6 +23,30 @@ x86_64-apple-darwin)
   arch=x86_64
   export MACOSX_DEPLOYMENT_TARGET=10.12
   ;;
+armv7-linux-android)
+  api_level=16
+  ndk_target=arm-linux-androideabi
+  ndk_prefix=arm-linux-androideabi
+  ndk_arch=arm
+  ;;
+aarch64-linux-android)
+  api_level=21
+  ndk_target=aarch64-linux-android
+  ndk_prefix=aarch64-linux-android
+  ndk_arch=arm64
+  ;;
+i686-linux-android)
+  api_level=16
+  ndk_target=i686-linux-android
+  ndk_prefix=x86
+  ndk_arch=x86
+  ;;
+x86_64-linux-android)
+  api_level=21
+  ndk_target=x86_64-linux-android
+  ndk_prefix=x86_64
+  ndk_arch=x86_64
+  ;;
 esac
 
 case "$target" in
@@ -45,6 +69,34 @@ case "$target" in
   chmod +x codesign
   PATH="$PWD:$MOZ_FETCHES_DIR/cctools/bin:$PATH"
   ;;
+*-linux-android)
+  libdir=lib/linux
+  cflags="
+    --gcc-toolchain=$MOZ_FETCHES_DIR/android-ndk/toolchains/$ndk_prefix-4.9/prebuilt/linux-x86_64
+    -isystem $MOZ_FETCHES_DIR/android-ndk/sysroot/usr/include/$ndk_target
+    -isystem $MOZ_FETCHES_DIR/android-ndk/sysroot/usr/include
+    -D__ANDROID_API__=$api_level
+  "
+  # These flags are only necessary to pass the cmake tests.
+  exe_linker_flags="
+    -L$MOZ_FETCHES_DIR/android-ndk/toolchains/llvm/prebuilt/linux-x86_64/sysroot/usr/lib/$ndk_target/$api_level
+    -L$MOZ_FETCHES_DIR/android-ndk/toolchains/llvm/prebuilt/linux-x86_64/sysroot/usr/lib/$ndk_target
+  "
+  EXTRA_CMAKE_FLAGS="
+    -DCMAKE_SYSROOT=$MOZ_FETCHES_DIR/android-ndk/platforms/android-$api_level/arch-$ndk_arch
+    -DCMAKE_SHARED_LINKER_FLAGS=-fuse-ld=lld
+    -DCMAKE_LINKER=$MOZ_FETCHES_DIR/clang/bin/ld.lld
+    -DCMAKE_C_FLAGS='-fPIC $cflags'
+    -DCMAKE_ASM_FLAGS='$cflags'
+    -DCMAKE_CXX_FLAGS='-fPIC -Qunused-arguments $cflags'
+    -DCMAKE_EXE_LINKER_FLAGS='-fuse-ld=lld $exe_linker_flags'
+    -DCMAKE_SHARED_LINKER_FLAGS=-fuse-ld=lld
+    -DANDROID=1
+    -DANDROID_NATIVE_API_LEVEL=$api_level
+    -DSANITIZER_ALLOW_CXXABI=OFF
+    -DCOMPILER_RT_BUILD_LIBFUZZER=OFF
+  "
+  ;;
 aarch64-unknown-linux-gnu)
   libdir=lib/linux
   EXTRA_CMAKE_FLAGS="
@@ -70,7 +122,7 @@ for patchfile in "$@"; do
   patch -d $MOZ_FETCHES_DIR/llvm-project -p1 < $GECKO_PATH/$patchfile
 done
 
-cmake \
+eval cmake \
   $MOZ_FETCHES_DIR/llvm-project/compiler-rt \
   -GNinja \
   -DCMAKE_C_COMPILER=$clang \