Build fix. (#470)

env BAZEL_CXXOPTS=-std=c++14 bazel build //...
now works.

.bazelrc

@@ -1,9 +1,6 @@
 # bazel configurations for running tests under sanitizers.
 # Based on https://github.com/bazelment/trunk/blob/master/tools/bazel.rc
 
-# Needed by gRPC to build on some platforms.
-build --copt -DGRPC_BAZEL_BUILD
-
 # --config=asan : Address Sanitizer.
 common:asan --copt -fsanitize=address
 common:asan --copt -DADDRESS_SANITIZER

README.md

@@ -44,7 +44,7 @@ for stats.
 ## Language support
 
 * STL is required. (e.g. `libstdc++`, `libc++`, etc)
-* C++11 is required.
+* C++14 is required.
 * [`absl`](https://github.com/abseil/abseil-cpp/) is used for its building blocks.
 * [`googletest`](https://github.com/google/googletest/) is used for tests.
 * [`benchmark`](https://github.com/google/benchmark/) is used for benchmarking.

WORKSPACE

@@ -31,59 +31,19 @@ http_archive(
 # Only needed for benchmarks, not to build the OpenCensus library.
 http_archive(
     name = "com_github_google_benchmark",
-    strip_prefix = "benchmark-master",
-    urls = ["https://github.com/google/benchmark/archive/master.zip"],
+    strip_prefix = "benchmark-main",
+    urls = ["https://github.com/google/benchmark/archive/main.zip"],
 )
 
 load("@com_github_grpc_grpc//bazel:grpc_deps.bzl", "grpc_deps")
 
 grpc_deps()
 
-http_archive(
-    name = "rules_python",
-    strip_prefix = "rules_python-main",
-    url = "https://github.com/bazelbuild/rules_python/archive/main.zip",
-)
-
-# grpc_deps() cannot load() its deps, this WORKSPACE has to do it.
-# See also: https://github.com/bazelbuild/bazel/issues/1943
-load(
-    "@build_bazel_rules_apple//apple:repositories.bzl",
-    "apple_rules_dependencies",
-)
+load("@com_github_grpc_grpc//bazel:grpc_extra_deps.bzl", "grpc_extra_deps")
 
-apple_rules_dependencies()
-
-load(
-    "@build_bazel_apple_support//lib:repositories.bzl",
-    "apple_support_dependencies",
-)
-
-apple_support_dependencies()
-
-# Used by prometheus-cpp.
-local_repository(
-    name = "net_zlib_zlib",
-    path = "tools/zlib",
-)
+grpc_extra_deps()
 
 # Load Prometheus dependencies.
 load("@com_github_jupp0r_prometheus_cpp//bazel:repositories.bzl", "prometheus_cpp_repositories")
 
 prometheus_cpp_repositories()
-
-# Google APIs - used by Stackdriver exporter.
-load("@com_google_googleapis//:repository_rules.bzl", "switched_rules_by_language")
-
-switched_rules_by_language(
-    name = "com_google_googleapis_imports",
-    cc = True,
-    grpc = True,
-)
-
-# Needed by @opencensus_proto.
-load("@io_bazel_rules_go//go:deps.bzl", "go_register_toolchains", "go_rules_dependencies")
-
-go_rules_dependencies()
-
-go_register_toolchains()

bazel/deps.bzl

@@ -4,13 +4,6 @@ load("@bazel_tools//tools/build_defs/repo:utils.bzl", "maybe")
 def opencensus_cpp_deps():
     """Loads dependencies need to compile the opencensus-cpp library."""
 
-    maybe(
-        http_archive,
-        name = "rules_cc",
-        strip_prefix = "rules_cc-main",
-        urls = ["https://github.com/bazelbuild/rules_cc/archive/main.zip"],
-    )
-
     # We depend on Abseil.
     maybe(
         http_archive,
@@ -19,6 +12,14 @@ def opencensus_cpp_deps():
         urls = ["https://github.com/abseil/abseil-cpp/archive/master.zip"],
     )
 
+    # Abseil depends on skylib.
+    maybe(
+        http_archive,
+        name = "bazel_skylib",
+        strip_prefix = "bazel-skylib-main",
+        urls = ["https://github.com/bazelbuild/bazel-skylib/archive/main.zip"],
+    )
+
     # gRPC
     maybe(
         http_archive,
@@ -61,17 +62,6 @@ def opencensus_cpp_deps():
         urls = ["https://github.com/googleapis/googleapis/archive/master.zip"],
     )
 
-    # Needed by opencensus-proto.
-    maybe(
-        http_archive,
-        name = "io_bazel_rules_go",
-        sha256 = "9fb16af4d4836c8222142e54c9efa0bb5fc562ffc893ce2abeac3e25daead144",
-        urls = [
-            "https://storage.googleapis.com/bazel-mirror/github.com/bazelbuild/rules_go/releases/download/0.19.0/rules_go-0.19.0.tar.gz",
-            "https://github.com/bazelbuild/rules_go/releases/download/0.19.0/rules_go-0.19.0.tar.gz",
-        ],
-    )
-
     # OpenCensus proto - used by OcAgent exporter.
     maybe(
         http_archive,

tools/travis/build_bazel.sh

@@ -27,6 +27,8 @@ if [[ "$TRAVIS_COMPILER" = "clang" ]]; then
   export BAZEL_OPTIONS="$BAZEL_OPTIONS --copt=-Werror=thread-safety --copt=-Werror=thread-safety-reference"
 fi
 
+export BAZEL_CXXOPTS=-std=c++14
+
 export BAZEL_VERSION="3.7.2"
 
 wget https://github.com/bazelbuild/bazel/releases/download/${BAZEL_VERSION}/bazel-${BAZEL_VERSION}-installer-${BAZEL_OS}-x86_64.sh