From 9e19a61ddb42208ea9ff14bc5ec1f5faaa0bdeee Mon Sep 17 00:00:00 2001
From: Ben Boeckel <ben.boeckel@kitware.com>
Date: Mon, 11 Dec 2023 07:53:40 -0500
Subject: cmLocalGenerator: disable C++ module scanning for unity sources

---
 Source/cmLocalGenerator.cxx | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Source/cmLocalGenerator.cxx b/Source/cmLocalGenerator.cxx
index a3003bd..168cd41 100644
--- a/Source/cmLocalGenerator.cxx
+++ b/Source/cmLocalGenerator.cxx
@@ -3196,6 +3196,7 @@ void cmLocalGenerator::AddUnityBuild(cmGeneratorTarget* target)
       target->AddSource(file.Path, true);
       unity->SetProperty("SKIP_UNITY_BUILD_INCLUSION", "ON");
       unity->SetProperty("UNITY_SOURCE_FILE", file.Path);
+      unity->SetProperty("CXX_SCAN_FOR_MODULES", "0");
       if (file.PerConfig) {
         unity->SetProperty("COMPILE_DEFINITIONS",
                            "CMAKE_UNITY_CONFIG_$<UPPER_CASE:$<CONFIG>>");
-- 
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