From 07fe1bcd4ed899e71ec4d73284d0d6249f43fd72 Mon Sep 17 00:00:00 2001
From: Cristian Adam <cristian.adam@gmail.com>
Date: Thu, 16 Jan 2020 17:05:05 +0100
Subject: PCH: No repeated path for internal generated PCH files (MSVC case)

Fixes: #19952
---
 Source/cmLocalGenerator.cxx | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Source/cmLocalGenerator.cxx b/Source/cmLocalGenerator.cxx
index fca04a8..ffd46d4 100644
--- a/Source/cmLocalGenerator.cxx
+++ b/Source/cmLocalGenerator.cxx
@@ -3167,7 +3167,8 @@ std::string cmLocalGenerator::GetObjectFileNameWithoutTarget(
   // CMakeFiles/<target>.dir/CMakeFiles/<target>.dir/generated_source_file.obj
   const char* unitySourceFile = source.GetProperty("UNITY_SOURCE_FILE");
   const char* pchExtension = source.GetProperty("PCH_EXTENSION");
-  if (unitySourceFile || pchExtension) {
+  const bool isPchObject = objectName.find("cmake_pch") != std::string::npos;
+  if (unitySourceFile || pchExtension || isPchObject) {
     if (pchExtension) {
       customOutputExtension = pchExtension;
     }
-- 
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