Enable support for other ARM GNU Toolchains, add arm-none-linux-gnueabihf toolchain

.github/workflows/mac.yml

@@ -15,7 +15,7 @@ jobs:
       - uses: actions/checkout@v2
       - name: Build examples
         run: |
-          bazelisk build //examples/...
+          bazelisk build //examples/arm-none/...
       - name: Bazel backwards compatibility
         run: |
-          USE_BAZEL_VERSION=6.4.0 bazelisk build //examples/...
+          USE_BAZEL_VERSION=6.4.0 bazelisk build //examples/arm-none/...

.github/workflows/windows.yml

@@ -15,8 +15,8 @@ jobs:
       - uses: actions/checkout@v2
       - name: Build examples
         run: |
-          bazelisk build //examples/...
+          bazelisk --output_user_root=C:/bzl build //examples/...
       - name: Bazel backwards compatibility
         run: |
           $Env:USE_BAZEL_VERSION = "6.4.0"
-          bazelisk build //examples/...
+          bazelisk --output_user_root=C:/bzl build //examples/...

BUILD

@@ -1,26 +0,0 @@
-# BUILD
-
-load("//toolchain:toolchain.bzl", "hosts", "tools")
-
-package(default_visibility = ["//visibility:public"])
-
-TOOLS = tools + ["bin"]
-
-[
-    config_setting(
-        name = host,
-        constraint_values = constraint_values,
-    )
-    for host, constraint_values in hosts.items()
-]
-
-[
-    filegroup(
-        name = tool,
-        srcs = select({
-            host: ["@arm_none_eabi_{}//:{}".format(host, tool)]
-            for host in hosts.keys()
-        }),
-    )
-    for tool in TOOLS
-]

MODULE.bazel

@@ -1,31 +1,47 @@
 module(
-    name = "arm_none_eabi",
+    name = "arm_gnu_toolchain",
     version = "1.0.0",
     compatibility_level = 1,
 )
 
 bazel_dep(name = "platforms", version = "0.0.8")
+bazel_dep(name = "rules_cc", version = "0.0.9")
 
-arm_none_eabi_gcc = use_extension("@arm_none_eabi//:extensions.bzl", "arm_none_eabi")
-arm_none_eabi_gcc.toolchain(version = "9.2.1")
+arm_toolchain = use_extension("@arm_gnu_toolchain//:extensions.bzl", "arm_toolchain")
+# NOTE: It's important that we update these versions whenever a new toolchain
+# version is added--otherwise the Minimum Selected Version algorithm in the
+# module extension will select the version here if a consumer attempts to use
+# the newer toolchain.
+arm_toolchain.arm_none_eabi(version = "13.2.1")
 use_repo(
-    arm_none_eabi_gcc,
+    arm_toolchain,
+    "arm_none_eabi",
     "arm_none_eabi_darwin_x86_64",
     "arm_none_eabi_linux_aarch64",
     "arm_none_eabi_linux_x86_64",
     "arm_none_eabi_windows_x86_64",
 )
 
+arm_toolchain.arm_none_linux_gnueabihf(version = "13.2.1")
+use_repo(
+    arm_toolchain,
+    "arm_none_linux_gnueabihf",
+    "arm_none_linux_gnueabihf_linux_aarch64",
+    "arm_none_linux_gnueabihf_linux_x86_64",
+    "arm_none_linux_gnueabihf_windows_x86_64",
+)
+
 # DEV ONLY (not needed for release)
 bazel_dep(name = "aspect_bazel_lib", version = "2.0.0", dev_dependency = True)
 bazel_dep(name = "bazel_skylib", version = "1.5.0", dev_dependency = True)
 
 register_toolchains(
     "@arm_none_eabi//toolchain:all",
+    "@arm_none_linux_gnueabihf//toolchain:all",
     dev_dependency = True,
 )
 
 register_toolchains(
-    "@arm_none_eabi//examples/custom/toolchain:all",
+    "@arm_gnu_toolchain//examples/arm-none/custom/toolchain:all",
     dev_dependency = True,
 )