fix ref

Change-Id: I133d22637f3583d1ee3e8ec44cf1838f2fbcfe57

Author: lizhimins

.bazelrc

@@ -24,7 +24,4 @@ build --action_env=CC
 build --action_env=CXX
 build --action_env=LD_LIBRARY_PATH
 build --action_env=LLVM_CONFIG
-build --action_env=PATH
-
-build --cxxopt=-std=c++17
-build --host_cxxopt=-std=c++17
+build --action_env=PATH

.github/workflows/main.yml

@@ -27,6 +27,7 @@ jobs:
       - name: Install System Dependencies
         run: |
           sudo apt-get update
+          # https://gcc.gnu.org/projects/cxx-status.html
           sudo apt-get install -y gcc-10 g++-10
           sudo g++ --version
       - name: Setup Bazel
@@ -40,4 +41,8 @@ jobs:
         run: |
           export CC=/usr/bin/gcc-10
           export CXX=/usr/bin/g++-10
-          bazel build //... -s
+          bazel build //... \
+            --compiler=gcc-10 \
+            --cxxopt='-std=c++17' \
+            --host_cxxopt='-std=c++17' \
+            -s

WORKSPACE

@@ -24,6 +24,8 @@ load(
 
 io_grpc_grpc_java()
 
+# https://github.com/abseil/abseil-cpp/releases?page=3
+# Abseil LTS branch, March 2021, Patch 2
 http_archive(
     name = "com_google_absl",
     sha256 = "59b862f50e710277f8ede96f083a5bb8d7c9595376146838b9580be90374ee1f",