Add gRPC specific define.
See for more information.
@@ -30,6 +30,11 @@ build --copt=-march=native
build --host_copt=-march=native
build --copt=-O3
+# gRPC on MacOS requires this define, see
+# https://github.com/bazelbuild/bazel/issues/4341#issuecomment-572050759 for
+# more information.
+build:macos --copt=-DGRPC_BAZEL_BUILD
+
#
# Remote execution capabilities.
#
