grpc-cython-copts.patch

diff --git bazel/cython_library.bzl bazel/cython_library.bzl
--- bazel/cython_library.bzl
+++ bazel/cython_library.bzl
@@ -10,15 +10,16 @@
-def pyx_library(name, deps = [], py_deps = [], srcs = [], **kwargs):
+def pyx_library(name, deps = [], 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).
+        cc_kwargs: cc_binary extra arguments such as copts, linkstatic, linkopts, features
@@ -57,7 +59,8 @@ def pyx_library(name, deps = [], py_deps = [], srcs = [], **kwargs):
-        shared_object_name = stem + ".so"
+        shared_object_name = stem + ".so"
         native.cc_binary(
-            name = shared_object_name,
+            name = cc_kwargs.pop("name", shared_object_name),
-            srcs = [stem + ".cpp"],
+            srcs = [stem + ".cpp"] + cc_kwargs.pop("srcs", []),
-            deps = deps + ["@local_config_python//:python_headers"],
+            deps = deps + ["@local_config_python//:python_headers"] + cc_kwargs.pop("deps", []),
-            linkshared = 1,
+            linkshared = cc_kwargs.pop("linkshared", 1),
+            **cc_kwargs
         )
--