+/* SPDX-License-Identifier: LGPL-2.1+ */
#ifndef foosdcommonhfoo
#define foosdcommonhfoo
/***
- This file is part of systemd.
-
Copyright 2013 Lennart Poettering
systemd is free software; you can redistribute it and/or modify it
/* This is a private header; never even think of including this directly! */
-#if __INCLUDE_LEVEL__ <= 1
-#error "Do not include _sd-common.h directly; it is a private header."
+#if defined(__INCLUDE_LEVEL__) && __INCLUDE_LEVEL__ <= 1
+# error "Do not include _sd-common.h directly; it is a private header."
#endif
#ifndef _sd_printf_