[bazel] Add rules for clang-fuzzer protobuf-related libraries (llvm#123126)

Also bumped up bazel_skylib to the latest version because the proto
rules were complaining about a missing feature.

Author: slackito

utils/bazel/WORKSPACE

@@ -5,11 +5,11 @@
 load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
 load("@bazel_tools//tools/build_defs/repo:utils.bzl", "maybe")
 
-SKYLIB_VERSION = "1.3.0"
+SKYLIB_VERSION = "1.7.1"
 
 http_archive(
     name = "bazel_skylib",
-    sha256 = "74d544d96f4a5bb630d465ca8bbcfe231e3594e5aae57e1edbf17a6eb3ca2506",
+    sha256 = "bc283cdfcd526a52c3201279cda4bc298652efa898b10b4db0837dc51652756f",
     urls = [
         "https://mirror.bazel.build/github.com/bazelbuild/bazel-skylib/releases/download/{version}/bazel-skylib-{version}.tar.gz".format(version = SKYLIB_VERSION),
         "https://github.com/bazelbuild/bazel-skylib/releases/download/{version}/bazel-skylib-{version}.tar.gz".format(version = SKYLIB_VERSION),
@@ -18,9 +18,9 @@ http_archive(
 
 http_archive(
     name = "rules_cc",
-    urls = ["https://github.com/bazelbuild/rules_cc/releases/download/0.0.17/rules_cc-0.0.17.tar.gz"],
     sha256 = "abc605dd850f813bb37004b77db20106a19311a96b2da1c92b789da529d28fe1",
     strip_prefix = "rules_cc-0.0.17",
+    urls = ["https://github.com/bazelbuild/rules_cc/releases/download/0.0.17/rules_cc-0.0.17.tar.gz"],
 )
 
 new_local_repository(
@@ -158,9 +158,9 @@ maybe(
 maybe(
     http_archive,
     name = "robin_map",
-    strip_prefix = "robin-map-1.3.0",
-    sha256 = "a8424ad3b0affd4c57ed26f0f3d8a29604f0e1f2ef2089f497f614b1c94c7236",
     build_file = "@llvm-raw//utils/bazel/third_party_build:robin_map.BUILD",
+    sha256 = "a8424ad3b0affd4c57ed26f0f3d8a29604f0e1f2ef2089f497f614b1c94c7236",
+    strip_prefix = "robin-map-1.3.0",
     url = "https://github.com/Tessil/robin-map/archive/refs/tags/v1.3.0.tar.gz",
 )
 

utils/bazel/llvm-project-overlay/clang/BUILD.bazel

@@ -2758,6 +2758,30 @@ cc_library(
     ],
 )
 
+proto_library(
+    name = "cxx-proto",
+    srcs = ["tools/clang-fuzzer/cxx_proto.proto"],
+)
+
+cc_proto_library(
+    name = "cxx_cc_proto",
+    deps = [":cxx-proto"],
+)
+
+cc_library(
+    name = "proto-to-cxx-lib",
+    srcs = ["tools/clang-fuzzer/proto-to-cxx/proto_to_cxx.cpp"],
+    hdrs = ["tools/clang-fuzzer/proto-to-cxx/proto_to_cxx.h"],
+    includes = ["tools/clang-fuzzer"],
+    deps = [":cxx_cc_proto"],
+)
+
+cc_binary(
+    name = "clang-proto-to-cxx",
+    srcs = ["tools/clang-fuzzer/proto-to-cxx/proto_to_cxx_main.cpp"],
+    deps = [":proto-to-cxx-lib"],
+)
+
 cc_library(
     name = "clang-fuzzer-initialize",
     srcs = ["tools/clang-fuzzer/fuzzer-initialize/fuzzer_initialize.cpp"],