Patch Cython in grpc to use our COPTS (ray-project#6223)

BUILD.bazel

@@ -776,6 +776,7 @@ pyx_library(
  "python/ray/includes/*.pxd",
  "python/ray/includes/*.pxi",
  ]),
+ copts = COPTS,
  deps = [
  "//:core_worker_lib",
  "//:raylet_lib",

bazel/ray_deps_setup.bzl

@@ -118,6 +118,9 @@ def ray_deps_setup():
  commit = "93e8830070e9afcbaa992c75817009ee3f4b63a0",
  remote = "https://github.com/grpc/grpc.git",
  shallow_since = "1571118670 -0700",
+ patches = [
+ "//thirdparty/patches:grpc-cython-copts.patch",
+ ],
  )
 
  git_repository(

thirdparty/patches/grpc-cython-copts.patch

@@ -0,0 +1,30 @@
+diff --git bazel/cython_library.bzl bazel/cython_library.bzl
+index 48b41d74e8..6084734f59 100644
+--- bazel/cython_library.bzl
++++ bazel/cython_library.bzl
+@@ -7,7 +7,7 @@
+ # been written at cython/cython and tensorflow/tensorflow. We branch from
+ # Tensorflow's version as it is more actively maintained and works for gRPC
+ # Python's needs.
+-def pyx_library(name, deps=[], py_deps=[], srcs=[], **kwargs):
++def pyx_library(name, deps=[], copts=[], py_deps=[], srcs=[], **kwargs):
+ """Compiles a group of .pyx / .pxd / .py files.
+
+ First runs Cython to create .cpp files for each input .pyx or .py + .pxd
+@@ -19,6 +19,7 @@ def pyx_library(name, deps=[], py_deps=[], srcs=[], **kwargs):
+ Args:
+ name: Name for the rule.
+ deps: C/C++ dependencies of the Cython (e.g. Numpy headers).
++ copts: C/C++ compiler options for Cython
+ py_deps: Pure Python dependencies of the final library.
+ srcs: .py, .pyx, or .pxd files to either compile or pass through.
+ **kwargs: Extra keyword arguments passed to the py_library.
+@@ -58,6 +59,7 @@ def pyx_library(name, deps=[], py_deps=[], srcs=[], **kwargs):
+ native.cc_binary(
+ name=shared_object_name,
+ srcs=[stem + ".cpp"],
++ copts=copts,
+ deps=deps + ["@local_config_python//:python_headers"],
+ linkshared=1,
+ )
+--