Bug 1678154 - Create a clang repack including the aarch64 mac compiler-rt. r=firefox-build-system-reviewers,dmajor

Differential Revision: https://phabricator.services.mozilla.com/D97699

taskcluster/ci/toolchain/clang.yml

@@ -397,6 +397,22 @@ linux64-clang-11-macosx-cross:
             - artifact: clang.tar.zst
               dest: clang-mac
 
+linux64-clang-11-macosx-aarch64-cross:
+    description: "Clang 11 toolchain repack with MacOS aarch64 Compiler RT libs"
+    treeherder:
+        symbol: TL(clang11-macosx-aarch64)
+    worker-type: b-linux
+    worker:
+        max-run-time: 600
+    run:
+        script: repack-clang-linux-macosx-aarch64-cross.sh
+        toolchain-alias: linux64-clang-macosx-aarch64-cross
+        toolchain-artifact: public/build/clang.tar.zst
+    fetches:
+        toolchain:
+            - linux64-clang-11
+            - macosx64-aarch64-compiler-rt-11
+
 linux64-clang-11-win-cross:
     description: "Clang 11 toolchain repack with Windows Compiler RT libs"
     treeherder:

taskcluster/scripts/misc/repack-clang-linux-macosx-aarch64-cross.sh

@@ -0,0 +1,16 @@
+#!/bin/bash
+set -x -e -v
+
+# This script is for building clang for macos targets on a Linux host,
+# including native aarch64 macos Compiler-RT libraries.
+
+cd $MOZ_FETCHES_DIR
+
+# We have a native linux64 toolchain in $MOZ_FETCHES_DIR/clang
+# We have a native aarch64 macos compiler-rt in $MOZ_FETCHES_DIR/compiler-rt
+cp -r compiler-rt/lib/darwin clang/lib/clang/*/lib
+
+tar -cf - clang | python3 $GECKO_PATH/taskcluster/scripts/misc/zstdpy > clang.tar.zst
+
+mkdir -p $UPLOAD_DIR
+mv clang.tar.zst $UPLOAD_DIR