Add bzl_library targets

cc/BUILD

@@ -1,3 +1,5 @@
+load("@bazel_skylib//:bzl_library.bzl", "bzl_library")
+
 # Copyright 2019 The Bazel Authors. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
@@ -73,3 +75,54 @@ cc_toolchain_alias(name = "current_cc_toolchain")
 cc_host_toolchain_alias(name = "current_cc_host_toolchain")
 
 cc_libc_top_alias(name = "current_libc_top")
+
+bzl_library(
+    name = "action_names",
+    srcs = ["action_names.bzl"],
+)
+
+bzl_library(
+    name = "cc_toolchain_config_lib",
+    srcs = ["cc_toolchain_config_lib.bzl"],
+)
+
+bzl_library(
+    name = "defs",
+    srcs = ["defs.bzl"],
+    deps = [
+        "@rules_cc//cc/private/rules_impl:cc_flags_supplier",
+        "@rules_cc//cc/private/rules_impl:compiler_flag",
+    ],
+)
+
+bzl_library(
+    name = "find_cc_toolchain",
+    srcs = ["find_cc_toolchain.bzl"],
+)
+
+bzl_library(
+    name = "repositories",
+    srcs = ["repositories.bzl"],
+    # Temporarily omit @bazel_tools targets that can't be imported because they
+    # are not exported in the production version of Bazel.
+    # https://github.com/bazelbuild/bazel/pull/12258
+    deps = [
+        #"@bazel_tools//tools/build_defs/repo:http.bzl",
+        "@rules_cc//cc/private/toolchain:cc_configure",
+    ],  # keep
+)
+
+bzl_library(
+    name = "system_library",
+    srcs = ["system_library.bzl"],
+)
+
+bzl_library(
+    name = "toolchain_utils",
+    srcs = ["toolchain_utils.bzl"],
+)
+
+bzl_library(
+    name = "version",
+    srcs = ["version.bzl"],
+)

cc/private/rules_impl/BUILD

@@ -1,3 +1,5 @@
+load("@bazel_skylib//:bzl_library.bzl", "bzl_library")
+
 package(default_visibility = ["//visibility:public"])
 
 licenses(["notice"])  # Apache 2.0
@@ -9,3 +11,24 @@ filegroup(
         "**/BUILD",
     ]),
 )
+
+bzl_library(
+    name = "cc_flags_supplier",
+    srcs = ["cc_flags_supplier.bzl"],
+    deps = [
+        "@rules_cc//cc:action_names",
+        "@rules_cc//cc:find_cc_toolchain",
+        "@rules_cc//cc/private/rules_impl:cc_flags_supplier_lib",
+    ],
+)
+
+bzl_library(
+    name = "cc_flags_supplier_lib",
+    srcs = ["cc_flags_supplier_lib.bzl"],
+)
+
+bzl_library(
+    name = "compiler_flag",
+    srcs = ["compiler_flag.bzl"],
+    deps = ["@rules_cc//cc:find_cc_toolchain"],
+)

cc/private/toolchain/BUILD

@@ -1,3 +1,4 @@
+load("@bazel_skylib//:bzl_library.bzl", "bzl_library")
 load("//cc:defs.bzl", "cc_flags_supplier", "cc_library", "compiler_flag")
 
 # Copyright 2018 The Bazel Authors. All rights reserved.
@@ -93,3 +94,72 @@ filegroup(
 compiler_flag(name = "compiler")
 
 cc_flags_supplier(name = "cc_flags")
+
+bzl_library(
+    name = "armeabi_cc_toolchain_config",
+    srcs = ["armeabi_cc_toolchain_config.bzl"],
+    deps = ["@rules_cc//cc:cc_toolchain_config_lib"],
+)
+
+bzl_library(
+    name = "cc_configure",
+    srcs = ["cc_configure.bzl"],
+    deps = ["@bazel_tools//tools/osx:xcode_configure.bzl"],
+)
+
+bzl_library(
+    name = "cc_toolchain_config",
+    srcs = ["cc_toolchain_config.bzl"],
+    deps = [
+        "@rules_cc//cc:action_names",
+        "@rules_cc//cc:cc_toolchain_config_lib",
+    ],
+)
+
+bzl_library(
+    name = "empty_cc_toolchain_config",
+    srcs = ["empty_cc_toolchain_config.bzl"],
+)
+
+bzl_library(
+    name = "freebsd_cc_toolchain_config",
+    srcs = ["freebsd_cc_toolchain_config.bzl"],
+    deps = [
+        "@rules_cc//cc:action_names",
+        "@rules_cc//cc:cc_toolchain_config_lib",
+    ],
+)
+
+bzl_library(
+    name = "osx_cc_configure",
+    srcs = ["osx_cc_configure.bzl"],
+    deps = ["@bazel_tools//tools/osx:xcode_configure.bzl"],
+)
+
+bzl_library(
+    name = "unix_cc_configure",
+    srcs = ["unix_cc_configure.bzl"],
+)
+
+bzl_library(
+    name = "unix_cc_toolchain_config",
+    srcs = ["unix_cc_toolchain_config.bzl"],
+    deps = [
+        "@rules_cc//cc:action_names",
+        "@rules_cc//cc:cc_toolchain_config_lib",
+    ],
+)
+
+bzl_library(
+    name = "windows_cc_configure",
+    srcs = ["windows_cc_configure.bzl"],
+)
+
+bzl_library(
+    name = "windows_cc_toolchain_config",
+    srcs = ["windows_cc_toolchain_config.bzl"],
+    deps = [
+        "@rules_cc//cc:action_names",
+        "@rules_cc//cc:cc_toolchain_config_lib",
+    ],
+)

tools/migration/BUILD

@@ -1,3 +1,5 @@
+load("@bazel_skylib//:bzl_library.bzl", "bzl_library")
+
 # Copyright 2018 The Bazel Authors. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
@@ -131,3 +133,13 @@ filegroup(
 )
 
 exports_files(["ctoolchain_compare.bzl"])
+
+bzl_library(
+    name = "cc_toolchain_config_comparator",
+    srcs = ["cc_toolchain_config_comparator.bzl"],
+)
+
+bzl_library(
+    name = "ctoolchain_compare",
+    srcs = ["ctoolchain_compare.bzl"],
+)