From 35432aabdaf16611ef5faf0e3eec29b7847c1026 Mon Sep 17 00:00:00 2001
From: Cristian Adam <cristian.adam@gmail.com>
Date: Fri, 27 Nov 2020 09:39:02 -0800
Subject: PCH: Fix compiler errors on iOS multi-arch using Ninja Multi-Config

Fixes: #21401
---
 Source/cmLocalGenerator.cxx | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/Source/cmLocalGenerator.cxx b/Source/cmLocalGenerator.cxx
index 4e6010c..65ddf95 100644
--- a/Source/cmLocalGenerator.cxx
+++ b/Source/cmLocalGenerator.cxx
@@ -2506,8 +2506,10 @@ void cmLocalGenerator::AddPchDependencies(cmGeneratorTarget* target)
         }
 
         if (!useMultiArchPch.empty()) {
-          target->Target->SetProperty(
-            cmStrCat(lang, "_COMPILE_OPTIONS_USE_PCH"), useMultiArchPch);
+
+          target->Target->AppendProperty(
+            cmStrCat(lang, "_COMPILE_OPTIONS_USE_PCH"),
+            cmStrCat("$<$<CONFIG:", config, ">:", useMultiArchPch, ">"));
         }
       }
 
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