From d3ac4e8246b0c48d1eabe80dd106a51a7bc51900 Mon Sep 17 00:00:00 2001
From: Brad King <brad.king@kitware.com>
Date: Tue, 30 Aug 2022 16:38:31 -0400
Subject: Tests: Teach RunCMake.SymlinkTrees to tolerate CCACHE_BASEDIR

If the test is driven with a `ccache`-wrapped compiler then
the `CCACHE_BASEDIR` environment variable might break paths
the test checks.

Fixes: #23885
---
 Tests/RunCMake/SymlinkTrees/RunCMakeTest.cmake | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Tests/RunCMake/SymlinkTrees/RunCMakeTest.cmake b/Tests/RunCMake/SymlinkTrees/RunCMakeTest.cmake
index e5bfac4..58a111a 100644
--- a/Tests/RunCMake/SymlinkTrees/RunCMakeTest.cmake
+++ b/Tests/RunCMake/SymlinkTrees/RunCMakeTest.cmake
@@ -1,5 +1,8 @@
 include(RunCMake)
 
+# Do not let ccache modify paths checked by the test cases.
+unset(ENV{CCACHE_BASEDIR})
+
 function(run_symlink_test_case)
   file(REMOVE_RECURSE
     "${RunCMake_TEST_BINARY_DIR}/CMakeCache.txt"
-- 
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