Circle CI: Add Linux AArch64 job

.circleci/config.yml

@@ -46,7 +46,7 @@ commonSteps: &commonSteps
           python3 -m pip install --user lit
           python3 -c "import lit.main; lit.main.main();" --version . | head -n 1
           # Download & extract host LDC
-          curl -fL --retry 3 --max-time 300 -o ldc2.tar.xz https://github.com/ldc-developers/ldc/releases/download/v$HOST_LDC_VERSION/ldc2-$HOST_LDC_VERSION-$CI_OS-x86_64.tar.xz
+          curl -fL --retry 3 --max-time 300 -o ldc2.tar.xz https://github.com/ldc-developers/ldc/releases/download/v$HOST_LDC_VERSION/ldc2-$HOST_LDC_VERSION-$CI_OS-${CI_ARCH:-x86_64}.tar.xz
           mkdir host-ldc
           tar -xf ldc2.tar.xz --strip 1 -C host-ldc
           rm ldc2.tar.xz
@@ -122,6 +122,18 @@ jobs:
       - EXTRA_APT_PACKAGES: gdmd llvm-dev libclang-common-10-dev
       - HOST_LDC_VERSION: 1.24.0
       - EXTRA_CMAKE_FLAGS: "-DBUILD_SHARED_LIBS=ON -DBUILD_LTO_LIBS=ON -DD_COMPILER=gdmd -DLDC_LINK_MANUALLY=ON"
+  Ubuntu-20.04-aarch64:
+    <<: *commonSteps
+    machine:
+      image: ubuntu-2004:current
+    resource_class: arm.large
+    environment:
+      - PARALLELISM: 4
+      - CI_OS: linux
+      - CI_ARCH: aarch64
+      - EXTRA_APT_PACKAGES: llvm-dev libclang-common-10-dev
+      - HOST_LDC_VERSION: 1.30.0
+      - EXTRA_CMAKE_FLAGS: "-DBUILD_LTO_LIBS=ON"
   macOS-x64:
     <<: *commonSteps
     macos:
@@ -151,5 +163,6 @@ workflows:
     jobs:
       - Ubuntu-20.04-multilib-rtSanitizers
       - Ubuntu-20.04-sharedLibsOnly-gdmd
-      - macOS-x64
-      - macOS-x64-sharedLibsOnly
+      - Ubuntu-20.04-aarch64
+      #- macOS-x64
+      #- macOS-x64-sharedLibsOnly