Docs: add crossref

[exim.git] / src / OS / unsupported / Makefile-CYGWIN

diff --git a/src/OS/unsupported/Makefile-CYGWIN b/src/OS/unsupported/Makefile-CYGWIN
index 5e608fe9e8febb5bdf37c298b79fa617fbb7b824..bc4545b47870813d0537ff6b1e94bf28e2da3816 100644 (file)
--- a/src/OS/unsupported/Makefile-CYGWIN
+++ b/src/OS/unsupported/Makefile-CYGWIN
@@ -1,4 +1,5 @@
 # OS-specific file for Cygwin.
+# SPDX-License-Identifier: GPL-2.0-or-later
 
 # This file provided by Pierre A. Humblet <Pierre.Humblet@ieee.org>