From 0ed1e6bc602969a1b29214960a03dda979ed3a3e Mon Sep 17 00:00:00 2001
From: InfinityWei <31464143+InfinityWei@users.noreply.github.com>
Date: Thu, 9 Oct 2025 13:09:07 +0800
Subject: [PATCH] Fix MacOS CI build (#2522)

As of https://github.com/actions/runner-images/issues/12934, the Mac runners use CMake 4.0, which drops compatibility with CMake < 3.5, but the gRPC library version we use is marked as having CMake 3.1 as its minimum version.

Work around this by using `-DCMAKE_POLICY_VERSION_MINIMUM=3.5`.
---
 .github/workflows/autobuild.yaml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/.github/workflows/autobuild.yaml b/.github/workflows/autobuild.yaml
index 02a7e85..d752c2f 100644
--- a/.github/workflows/autobuild.yaml
+++ b/.github/workflows/autobuild.yaml
@@ -171,6 +171,7 @@ jobs:
             "-DLLVM_ENABLE_ZLIB=FORCE_ON"
             "-DCMAKE_OSX_ARCHITECTURES=x86_64;arm64"
             "-DCMAKE_OSX_DEPLOYMENT_TARGET=10.13"
+            "-DCMAKE_POLICY_VERSION_MINIMUM=3.5"
           # BoringSSL doesn't support universal binaries when building with ASM.
           grpc_cmake: >-
             "-DOPENSSL_NO_ASM=ON"