From 15637450a5f02f4e824061a5cb5453bc4f3d28f6 Mon Sep 17 00:00:00 2001
From: karenwuz <karenwuz@google.com>
Date: Thu, 22 Oct 2026 18:21:53 +0000
Subject: [PATCH] adding Windows linker flag to py_extenstion

---
 python/private/cc/py_extension_macro.bzl | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/python/private/cc/py_extension_macro.bzl b/python/private/cc/py_extension_macro.bzl
index b76685113a..bd1f46d0ca 100644
--- a/python/private/cc/py_extension_macro.bzl
+++ b/python/private/cc/py_extension_macro.bzl
@@ -101,6 +101,23 @@ def py_extension(
         "//conditions:default": ["-fPIC"],
     })
 
+    linkopts = linkopts +  select({
+        # Windows MinGW linker flags are needed for Python upb windows x86 wheels test
+        "//python/dist:windows_x86_32": ["-static-libgcc"],
+        "//conditions:default": [],
+        }) + select({
+        "//python/dist:windows_x86_64_mingw": [
+        "-Wl,--dynamicbase",
+        "-Wl,--nxcompat",
+        "-Wl,--high-entropy-va",
+        ],
+        "//python/dist:windows_x86_32_mingw": [
+            "-Wl,--dynamicbase",
+                "-Wl,--nxcompat",
+        ],
+        "//conditions:default": [],
+    })
+
     # Private alias targets are appended to avoid "duplicate dependency label" errors
     # if a user explicitly passes //python/cc:current_py_cc_headers or //python/cc:current_py_cc_libs
     # in their deps attribute (including when deps is a select() expression).