fix: compile pthreadpool successfully on Windows

Author: homuler

WORKSPACE

@@ -218,6 +218,12 @@ http_archive(
 # pthreadpool is a dependency of XNNPACK, from 2025-04-02
 http_archive(
     name = "pthreadpool",
+    patch_args = [
+        "-p1",
+    ],
+    patches = [
+        "@//third_party:pthreadpool.patch",
+    ],
     # `curl -L <url> | shasum -a 256`
     sha256 = "745e56516d6a58d183eb33d9017732d87cff43ce9f78908906f9faa52633e421",
     strip_prefix = "pthreadpool-b92447772365661680f486e39a91dfe6675adafc",

third_party/pthreadpool.patch

@@ -0,0 +1,19 @@
+diff --git a/BUILD.bazel b/BUILD.bazel
+index 396537f..081a0a2 100644
+--- a/BUILD.bazel
++++ b/BUILD.bazel
+@@ -67,9 +67,11 @@ cc_library(
+     hdrs = [
+         "include/pthreadpool.h",
+     ],
+-    copts = [
+-        "-std=c11",
+-    ] + select({
++    copts = select({
++        ":windows_x86_64": ["/std:c11", "/experimental:c11atomics"],
++        ":windows_arm64": ["/std:c11", "/experimental:c11atomics"],
++        "//conditions:default": ["-std=c11"],
++    }) + select({
+         ":optimized_build": ["-O2"],
+         "//conditions:default": [],
+     }) + select({