LinuxBionic supports arm64
LinuxBionic now supports arm64 architecture in addition to the existing
x86_64 arch. This is to make it possible to build host tools like adb,
fastboot, crosvm, etc. for Linux/ARM on regular Linux/x86 machines.
The arm64 target can be selected in various ways in Android.bp files:
- target.host (because this is still considered as a host target)
- target.linux (provided that the module is also enabled for host)
- target.linux_bionic (use the OS name directly)
- target.linux_bionic_arm64 (OS name + arch combo)
- target.linux_arm64 (provided that the module is also for host)
- target.not_windows
- arch.arm64
The toolchain for the new target is almost the same as the toolchain
config for Android/ARM64. One notable difference is that the clang
triple is aarch64-linux instead of aarch64-linux-android, so that
__ANDROID__ is not defined for the new OS type.
Bug: 134795810
Test: HOST_CROSS_OS=linux_bionic HOST_CROSS_ARCH=arm64 m nothing
Change-Id: If4300583edfb6d75bd4d984b38f73b6a406b4447
diff --git a/rust/config/Android.bp b/rust/config/Android.bp
index bcfac7c..e0cc4ce 100644
--- a/rust/config/Android.bp
+++ b/rust/config/Android.bp
@@ -16,5 +16,6 @@
"x86_linux_host.go",
"x86_device.go",
"x86_64_device.go",
+ "arm64_linux_host.go",
],
}
diff --git a/rust/config/arm64_device.go b/rust/config/arm64_device.go
index 180fd8b..b1f1f16 100644
--- a/rust/config/arm64_device.go
+++ b/rust/config/arm64_device.go
@@ -75,9 +75,16 @@
}
func Arm64ToolchainFactory(arch android.Arch) Toolchain {
+ archVariant := arch.ArchVariant
+ if archVariant == "" {
+ // arch variants defaults to armv8-a. This is mostly for
+ // the host target which borrows toolchain configs from here.
+ archVariant = "armv8-a"
+ }
+
toolchainRustFlags := []string{
"${config.Arm64ToolchainRustFlags}",
- "${config.Arm64" + arch.ArchVariant + "VariantRustFlags}",
+ "${config.Arm64" + archVariant + "VariantRustFlags}",
}
toolchainRustFlags = append(toolchainRustFlags, deviceGlobalRustFlags...)
diff --git a/rust/config/arm64_linux_host.go b/rust/config/arm64_linux_host.go
new file mode 100644
index 0000000..baf9cf8
--- /dev/null
+++ b/rust/config/arm64_linux_host.go
@@ -0,0 +1,24 @@
+// Copyright 2019 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package config
+
+import (
+ "android/soong/android"
+)
+
+func init() {
+ // Linux_cross-arm64 uses the same rust toolchain as the Android-arm64
+ registerToolchainFactory(android.LinuxBionic, android.Arm64, Arm64ToolchainFactory)
+}