//go/private:context bzl_library is missing transitive dep on @rules_cc//cc:find_cc_toolchain.bzl - breaks Stardoc users

[tetromino]

The //go/private:context bzl_library target lists a direct dependency on @bazel_tools//tools/cpp:toolchain_utils.bzl - but it's missing the transitive dependencies of that file. bazelbuild/bazel#23809 (released as part of Bazel 8) moved toolchain logic to rules_cc, and toolchain_utils.bzl now loads@rules_cc//cc:find_cc_toolchain.bzl.

So now//go/private:context needs a dep on @rules_cc//cc:find_cc_toolchain_bzl.

This was first reported at bazelbuild/stardoc#300 - the missing dep causes Stardoc doc generation for .bzl files which load rules_go symbols to start failing when updating from Bazel 7 to Bazel 8/9, because Stardoc requires complete transitive load dependencies to be accessible from deps.

To reproduce:

cat >MODULE.bazel <<EOF
bazel_dep(name = "rules_go", version = "0.55.1")
bazel_dep(name = "stardoc", version = "0.8.0")
bazel_dep(name = "bazel_skylib", version = "1.8.1")
EOF

cat >BUILD <<EOF
load("@bazel_skylib//:bzl_library.bzl", "bzl_library")
load("@stardoc//stardoc:stardoc.bzl", "stardoc")

bzl_library(
    name = "my_rule",
    srcs = ["my_rule.bzl"],
    visibility = ["//visibility:public"],
    deps = ["@rules_go//go:def"],
)

stardoc(
    name = "my_rule_docs",
    out = "my_rule.md",
    input = "my_rule.bzl",
    deps = [":my_rule"],
)
EOF

cat >my_rule.bzl <<EOF
load("@rules_go//go:def.bzl", "go_test")

def go_helper_test(name, **kwargs):
    """A helper function to create a Go test target with specific attributes."""
    go_test(
        name = name,
        srcs = ["test_helper.go"],
        embed = [":helper_lib"],
        **kwargs
    )
EOF

bazelisk build my_rule_docs

[tetromino]

Edit: sigh, @rules_cc//cc:find_cc_toolchain_bzl is in turn missing a transitive dep on @rules_cc//cc/common.

So until that's fixed, //go/private:context needs to depend on both @rules_cc//cc:find_cc_toolchain_bzl and @rules_cc//cc/common.

[tetromino]

bazelbuild/rules_cc#439 once merged should fix the missing transitive dep on @rules_cc//cc/common.