From 71ded12a756e78bdfe07f54dd84dbfebc7556f09 Mon Sep 17 00:00:00 2001
From: Brad King <brad.king@kitware.com>
Date: Fri, 29 Apr 2022 11:52:45 -0400
Subject: cmGeneratedFileStream: Do not remove empty path

If `Close()` is called when a file was never opened, we have no
temporary file path.  Do not try to remove it.  Some implementations of
`unlink()` crash on an empty path (though the documented behavior is to
fail with `ENOENT`).

Fixes: #23414
---
 Source/cmGeneratedFileStream.cxx | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/Source/cmGeneratedFileStream.cxx b/Source/cmGeneratedFileStream.cxx
index c86001a..a52e66a 100644
--- a/Source/cmGeneratedFileStream.cxx
+++ b/Source/cmGeneratedFileStream.cxx
@@ -180,7 +180,9 @@ bool cmGeneratedFileStreamBase::Close()
   // Else, the destination was not replaced.
   //
   // Always delete the temporary file. We never want it to stay around.
-  cmSystemTools::RemoveFile(this->TempName);
+  if (!this->TempName.empty()) {
+    cmSystemTools::RemoveFile(this->TempName);
+  }
 
   return replaced;
 }
-- 
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