Support Bazel 8.0.0rc4 (#87)

Addressing
bazelbuild/bazel-central-registry#3260

.github/workflows/tests.yml

@@ -19,6 +19,7 @@ jobs:
         bazel-version:
           - 6.x
           - 7.x
+          - 8.0.0rc4
         runner:
           - ubuntu-20.04
           - ubuntu-22.04
@@ -55,6 +56,7 @@ jobs:
         bazel-version:
           - 6.x
           - 7.x
+          - 8.0.0rc4
         runner:
           - ubuntu-20.04
           - ubuntu-22.04

MODULE.bazel

@@ -6,6 +6,8 @@ module(
     version = "0.0.0",
 )
 
+bazel_dep(name = "platforms", version = "0.0.10")
+
 ################################
 #
 # Dev-dependencies

lang/cc/build_error.bzl

@@ -7,7 +7,6 @@ load(
 )
 load(
     "@bazel_tools//tools/cpp:toolchain_utils.bzl",
-    "CPP_TOOLCHAIN_TYPE",
     "find_cpp_toolchain",
 )
 load(
@@ -449,7 +448,7 @@ _try_build = rule(
         ),
     },
     fragments = ["cpp"],
-    toolchains = [CPP_TOOLCHAIN_TYPE],
+    toolchains = ["@bazel_tools//tools/cpp:toolchain_type"],
     provides = [CcBuildErrorInfo, DefaultInfo],
 )
 
@@ -603,9 +602,9 @@ def cc_build_error(
         name = try_build_target,
         tags = ["manual"] + tags,
         os = select({
-            "@platforms//os:linux": "linux",
-            "@platforms//os:macos": "macos",
-            "@platforms//os:windows": "windows",
+            Label("//platforms/os:linux"): "linux",
+            Label("//platforms/os:macos"): "macos",
+            Label("//platforms/os:windows"): "windows",
         }),
         visibility = ["//visibility:private"],
         testonly = testonly,

platforms/os/BUILD.bazel

@@ -0,0 +1,14 @@
+alias(
+    name = "linux",
+    actual = "@platforms//os:linux",
+)
+
+alias(
+    name = "macos",
+    actual = "@platforms//os:macos",
+)
+
+alias(
+    name = "windows",
+    actual = "@platforms//os:windows",
+)