Add native support for Apple Silicon
After this PR, we can use a x86 version of Bazel to build an ARM64 Bazel binary for Apple Silicon by
```
bazel build --cpu=darwin_arm64 //src:bazel
```
The Bazel client, embedded tools and embedded JDK are all native ARM64 binaries.
Changes in this PR:
1. Add OpenJDK definitions for ARM64 macOS
2. Manually created the embedded JDK binaries on an Apple Silicon machine and uploaded them to the bazel mirror site.
3. AutoCpuConverter.java: identify the cpu value correctly
4. cc_toolchain_config.bzl: Explicitly specify the target platform also in the x86 cc toolchain, so that we can also do cross-platform compile from ARM64 to x86.
With the native arm64 Bazel binary, building Bazel itself takes only half of the time compared with the x86 Bazel binary on an Apple DTK machine:
```
$ bazel build --cpu=darwin_arm64 --disk_cache= --repository_cache= //src:bazel
Starting local Bazel server and connecting to it...
...
Target //src:bazel up-to-date:
bazel-bin/src/bazel
INFO: Elapsed time: 1044.462s, Critical Path: 180.08s
INFO: 2984 processes: 179 internal, 2092 darwin-sandbox, 1 local, 712 worker.
INFO: Build completed successfully, 2984 total actions
cp ./bazel-bin/src/bazel ~/bin/bazel-arm64
$ bazel-arm64 clean --expunge
$ bazel-arm64 build --disk_cache= --repository_cache= //src:bazel
Starting local Bazel server and connecting to it...
...
Target //src:bazel up-to-date:
bazel-bin/src/bazel
INFO: Elapsed time: 464.470s, Critical Path: 114.88s
INFO: 2984 processes: 179 internal, 2092 darwin-sandbox, 1 local, 712 worker.
INFO: Build completed successfully, 2984 total actions
```
Closes: https://github.com/bazelbuild/bazel/issues/11628
Closes #12900.
PiperOrigin-RevId: 354058336
diff --git a/src/BUILD b/src/BUILD
index ad767d8..e561cef 100644
--- a/src/BUILD
+++ b/src/BUILD
@@ -177,6 +177,9 @@
"//src/conditions:darwin_x86_64": [
"@openjdk_macos_x86_64//file",
],
+ "//src/conditions:darwin_arm64": [
+ "@openjdk_macos_aarch64//file",
+ ],
"//src/conditions:windows": [
"@openjdk_win//file",
],
@@ -196,6 +199,9 @@
"//src/conditions:darwin_x86_64": [
"@openjdk_macos_x86_64_minimal//file",
],
+ "//src/conditions:darwin_arm64": [
+ "@openjdk_macos_aarch64_minimal//file",
+ ],
"//src/conditions:windows": [
"@openjdk_win_minimal//file",
],
@@ -215,6 +221,9 @@
"//src/conditions:darwin_x86_64": [
"@openjdk_macos_x86_64_vanilla//file",
],
+ "//src/conditions:darwin_arm64": [
+ "@openjdk_macos_aarch64_vanilla//file",
+ ],
"//src/conditions:windows": [
"@openjdk_win_vanilla//file",
],
@@ -699,14 +708,17 @@
"@android_tools_for_testing//:WORKSPACE",
"@bazel_skylib//:WORKSPACE",
"@com_google_protobuf//:WORKSPACE",
+ "@openjdk11_darwin_aarch64_archive//:WORKSPACE",
"@openjdk11_darwin_archive//:WORKSPACE",
"@openjdk11_linux_archive//:WORKSPACE",
"@openjdk11_windows_archive//:WORKSPACE",
+ "@openjdk15_darwin_aarch64_archive//:WORKSPACE",
"@openjdk15_darwin_archive//:WORKSPACE",
"@openjdk15_linux_archive//:WORKSPACE",
"@openjdk15_windows_archive//:WORKSPACE",
"@openjdk_linux_aarch64_minimal//file",
"@openjdk_linux_minimal//file",
+ "@openjdk_macos_aarch64_minimal//file",
"@openjdk_macos_x86_64_minimal//file",
"@openjdk_win_minimal//file",
"@remote_coverage_tools//:WORKSPACE",
@@ -722,9 +734,11 @@
"@remotejdk11_linux_for_testing//:WORKSPACE",
"@remotejdk11_linux_ppc64le_for_testing//:WORKSPACE",
"@remotejdk11_linux_s390x_for_testing//:WORKSPACE",
+ "@remotejdk11_macos_aarch64_for_testing//:WORKSPACE",
"@remotejdk11_macos_for_testing//:WORKSPACE",
"@remotejdk11_win_for_testing//:WORKSPACE",
"@remotejdk15_linux_for_testing//:WORKSPACE",
+ "@remotejdk15_macos_aarch64_for_testing//:WORKSPACE",
"@remotejdk15_macos_for_testing//:WORKSPACE",
"@remotejdk15_win_for_testing//:WORKSPACE",
"@rules_cc//:WORKSPACE",
