ray/thirdparty/patches/grpc-cython-copts.patch

diff --git bazel/cython_library.bzl bazel/cython_library.bzl
index 48b41d74e8..a9bc168e5d 100644
--- bazel/cython_library.bzl
+++ bazel/cython_library.bzl
@@ -7,18 +7,20 @@
 # 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=[], cc_kwargs={}, 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
-    pair. Then builds a shared object for each, passing "deps" to each cc_binary
-    rule (includes Python headers by default). Finally, creates a py_library rule
-    with the shared objects and any pure Python "srcs", with py_deps as its
-    dependencies; the shared objects can be imported like normal Python files.
+    pair. Then builds a shared object for each, passing "deps" and `**cc_kwargs`
+    to each cc_binary rule (includes Python headers by default). Finally, creates
+    a py_library rule with the shared objects and any pure Python "srcs", with py_deps
+    as its dependencies; the shared objects can be imported like normal Python files.

     Args:
         name: Name for the rule.
         deps: C/C++ dependencies of the Cython (e.g. Numpy headers).
+        copts: C/C++ compiler options for Cython
+        cc_kwargs: cc_binary extra arguments such as linkstatic, linkopts, features
         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.
@@ -57,9 +59,11 @@ def pyx_library(name, deps=[], py_deps=[], srcs=[], **kwargs):
         shared_object_name = stem + ".so"
         native.cc_binary(
             name=shared_object_name,
-            srcs=[stem + ".cpp"],
+            srcs=[stem + ".cpp"] + cc_kwargs.pop("srcs", []),
+            copts=copts,
             deps=deps + ["@local_config_python//:python_headers"],
             linkshared=1,
+            **cc_kwargs
         )
         shared_objects.append(shared_object_name)

@@ -72,3 +76,4 @@ def pyx_library(name, deps=[], py_deps=[], srcs=[], **kwargs):
         data=shared_objects,
         **kwargs)

+
--