sd-login: minor header commenting improvements

[elogind.git] / src / systemd / _sd-common.h

diff --git a/src/systemd/_sd-common.h b/src/systemd/_sd-common.h
index 594ff3db2bb15e8e5184fd07e7105a6f86430d68..896a027eb5027a32f1d28a629455518fce60b3d6 100644 (file)
--- a/src/systemd/_sd-common.h
+++ b/src/systemd/_sd-common.h
@@ -22,7 +22,11 @@
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
 ***/
 
-/* This is a private header, never even think of including this directly! */
+/* 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."
+#endif
 
 #ifndef _sd_printf_
 #  if __GNUC__ >= 4