From 63db7ae9c40a806494dc81b9ae2940fe91a6aad7 Mon Sep 17 00:00:00 2001
From: Brad King <brad.king@kitware.com>
Date: Fri, 11 Dec 2020 12:27:42 -0500
Subject: cmake: Clear INSTALL file properties between runs

Do not keep state across separate project configurations.
This is particularly important in `cmake-gui` where those
configurations can be for separate projects.

Fixes: #21580
---
 Source/cmake.cxx | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Source/cmake.cxx b/Source/cmake.cxx
index 60a493c..e655634 100644
--- a/Source/cmake.cxx
+++ b/Source/cmake.cxx
@@ -286,6 +286,8 @@ void cmake::CleanupCommandsAndMacros()
   this->CurrentSnapshot = this->State->Reset();
   this->State->RemoveUserDefinedCommands();
   this->CurrentSnapshot.SetDefaultDefinitions();
+  // FIXME: InstalledFiles probably belongs in the global generator.
+  this->InstalledFiles.clear();
 }
 
 #ifndef CMAKE_BOOTSTRAP
-- 
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