add linux_arm64 platform

platforms/BUILD.bazel

@@ -23,3 +23,11 @@ config_setting(
         "@platforms//cpu:x86_64",
     ],
 )
+
+config_setting(
+    name = "linux_arm64",
+    constraint_values = [
+        "@platforms//os:linux",
+        "@platforms//cpu:aarch64",
+    ],
+)

protobuf.bzl

@@ -14,7 +14,8 @@ alias(
     actual = select({
         "@net_ankiweb_anki//platforms:windows_x86_64": "@protoc_bin_windows//:bin/protoc.exe",
         "@net_ankiweb_anki//platforms:macos_x86_64": "@protoc_bin_macos//:bin/protoc",
-        "@net_ankiweb_anki//platforms:linux_x86_64": "@protoc_bin_linux_x86_64//:bin/protoc"
+        "@net_ankiweb_anki//platforms:linux_x86_64": "@protoc_bin_linux_x86_64//:bin/protoc",
+        "@net_ankiweb_anki//platforms:linux_arm64": "@protoc_bin_linux_arm64//:bin/protoc"
     }),
     visibility = ["//visibility:public"]
 )
@@ -47,6 +48,16 @@ def setup_protobuf_binary(name):
         build_file_content = """exports_files(["bin/protoc"])""",
     )
 
+    maybe(
+        http_archive,
+        name = "protoc_bin_linux_arm64",
+        urls = [
+            "https://github.com/protocolbuffers/protobuf/releases/download/v3.14.0/protoc-3.14.0-linux-aarch_64.zip",
+        ],
+        sha256 = "67db019c10ad0a151373278383e4e9b756dc90c3cea6c1244d5d5bd230af7c1a",
+        build_file_content = """exports_files(["bin/protoc"])""",
+    )
+
     maybe(
         http_archive,
         name = "protoc_bin_windows",

pylib/anki/BUILD.bazel

@@ -114,6 +114,7 @@ py_wheel(
         "//platforms:windows_x86_64": "win_amd64",
         "//platforms:macos_x86_64": "macosx_10_7_x86_64",
         "//platforms:linux_x86_64": "manylinux2014_x86_64",
+        "//platforms:linux_arm64": "manylinux2014_aarch64",
     }),
     python_tag = "cp38",
     python_version = ">=3.8",