utility: add benchmark library, but don't use it yet.

bazel/envoy_build_system.bzl

@@ -164,6 +164,7 @@ def envoy_cc_binary(name,
                     data = [],
                     testonly = 0,
                     visibility = None,
+                    external_deps = [],
                     repository = "",
                     stamped = False,
                     deps = [],
@@ -172,6 +173,7 @@ def envoy_cc_binary(name,
     if stamped:
         _git_stamped_genrule(repository, name)
         _git_stamped_genrule(repository, name + ".stripped")
+    deps = deps + [envoy_external_dep_path(dep) for dep in external_deps]
     native.cc_binary(
         name = name,
         srcs = srcs,

bazel/external/BUILD

@@ -4,9 +4,9 @@ cc_library(
     name = "all_external",
     srcs = [":empty.cc"],
     deps = [
-        "@io_opentracing_cpp//:opentracing",
-        "@com_lightstep_tracer_cpp//:lightstep_tracer",
         "@com_google_googletest//:gtest",
+        "@com_lightstep_tracer_cpp//:lightstep_tracer",
+        "@io_opentracing_cpp//:opentracing",
     ],
 )
 

bazel/target_recipes.bzl

@@ -3,6 +3,7 @@
 # ci/build_container/build_recipes.
 TARGET_RECIPES = {
     "ares": "cares",
+    "benchmark": "benchmark",
     "event": "libevent",
     "event_pthreads": "libevent",
     "tcmalloc_and_profiler": "gperftools",

ci/build_container/build_recipes/benchmark.sh

@@ -0,0 +1,20 @@
+#!/bin/bash
+
+set -e
+export COMMIT="e1c3a83b8197cf02e794f61228461c27d4e78cfb"  # benchmark @ Jan 11, 2018
+
+git clone https://github.com/google/benchmark.git
+(cd benchmark; git reset --hard "$COMMIT")
+mkdir build
+
+cd build
+cmake -G "Unix Makefiles" ../benchmark \
+  -DCMAKE_BUILD_TYPE=RELEASE \
+  -DBENCHMARK_ENABLE_GTEST_TESTS=OFF
+make
+cp src/libbenchmark.a "$THIRDPARTY_BUILD"/lib
+cd ../benchmark
+
+INCLUDE_DIR="$THIRDPARTY_BUILD/include/testing/base/public"
+mkdir -p "$INCLUDE_DIR"
+cp include/benchmark/benchmark.h "$INCLUDE_DIR"

ci/prebuilt/BUILD

@@ -9,6 +9,13 @@ cc_library(
     includes = ["thirdparty_build/include"],
 )
 
+cc_library(
+    name = "benchmark",
+    srcs = ["thirdparty_build/lib/libbenchmark.a"],
+    hdrs = ["thirdparty_build/include/testing/base/public/benchmark.h"],
+    includes = ["thirdparty_build/include"],
+)
+
 cc_library(
     name = "crypto",
     srcs = ["thirdparty_build/lib/libcrypto.a"],