[bazel] SkCMS: Android config (32- and 64-bit, local and RBE).
After this CL lands, it will be possible to build SkCMS for Android on a Linux workstation, locally and on RBE, with the following commands:
$ export ANDROID_NDK_HOME=/path/to/ndk
$ bazel build //... --config=android-arm
$ bazel build //... --config=android-arm64
$ bazel build //... --config=android-arm-rbe
$ bazel build //... --config=android-arm64-rbe
See comments in //WORKSPACE for more.
Bug: skia:12400
Change-Id: Ibe33aa05d16037f0ea868456e69cde1470be77c7
Reviewed-on: https://skia-review.googlesource.com/c/skcms/+/471236
Reviewed-by: Joe Gregorio <jcgregorio@google.com>
Commit-Queue: Leandro Lovisolo <lovisolo@google.com>
diff --git a/.bazelrc b/.bazelrc
index 09d6775..6313017 100644
--- a/.bazelrc
+++ b/.bazelrc
@@ -60,3 +60,39 @@
build:windows-rbe --extra_execution_platforms=@rbe_windows_toolchains//config:platform
build:windows-rbe --host_platform=@rbe_windows_toolchains//config:platform
build:windows-rbe --platforms=@rbe_windows_toolchains//config:platform
+
+# Note: All Android configurations require the ANDROID_NDK_HOME environment variable to point to a
+# local copy of the Android NDK.
+#
+# For RBE builds, a local NDK is still needed because the list of input files of some C/C++ build
+# actions contains NDK source files, which Bazel pulls from the local NDK. See http://b/195294181.
+#
+# Warning: Currently, the most recent NDK version supported by Bazel (version 4.2.1 at the time of
+# writing) is r21e (https://dl.google.com/android/repository/android-ndk-r21e-linux-x86_64.zip).
+# Make sure your local NDK is r21e or older. See:
+# - https://github.com/bazelbuild/bazel/blob/286fb80081db0af43b1f86292ce417c6541d4ad4/src/main/java/com/google/devtools/build/lib/bazel/rules/android/ndkcrosstools/AndroidNdkCrosstools.java#L39-L59
+# - https://github.com/google/mediapipe/issues/1281
+
+# Android configuration for 32-bit ARM (armeabi-v7a ABI).
+build:android-arm --crosstool_top=@androidndk//:default_crosstool
+build:android-arm --cpu=armeabi-v7a
+build:android-arm --host_crosstool_top=@bazel_tools//tools/cpp:toolchain
+
+# Android RBE configuration for 32-bit ARM (armeabi-v7a ABI).
+build:android-arm-rbe --config=remote
+build:android-arm-rbe --config=android-arm
+build:android-arm-rbe --extra_toolchains=@rbe_linux_toolchains//config:cc-toolchain
+build:android-arm-rbe --extra_execution_platforms=@rbe_linux_toolchains//config:platform
+build:android-arm-rbe --platforms=@rbe_linux_toolchains//config:platform
+
+# Android configuration for 64-bit ARM (arm64-v8a ABI).
+build:android-arm64 --crosstool_top=@androidndk//:default_crosstool
+build:android-arm64 --cpu=arm64-v8a
+build:android-arm64 --host_crosstool_top=@bazel_tools//tools/cpp:toolchain
+
+# Android RBE configuration for 64-bit ARM (arm64-v8a ABI).
+build:android-arm64-rbe --config=remote
+build:android-arm64-rbe --config=android-arm64
+build:android-arm64-rbe --extra_toolchains=@rbe_linux_toolchains//config:cc-toolchain
+build:android-arm64-rbe --extra_execution_platforms=@rbe_linux_toolchains//config:platform
+build:android-arm64-rbe --platforms=@rbe_linux_toolchains//config:platform
diff --git a/WORKSPACE b/WORKSPACE
index 09ce154..21e7bfb 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -12,6 +12,18 @@
path = "bazel/toolchains/windows-bazel-4.2.1",
)
+############
+# Android. #
+############
+
+# Name *must* be "androidndk". The path to the NDK is pulled from $ANDROID_NDK_HOME.
+#
+# See https://docs.bazel.build/versions/main/android-ndk.html.
+android_ndk_repository(
+ name = "androidndk",
+ api_level = 31,
+)
+
##################################
# Docker rules and dependencies. #
##################################
