See sd-daemon(7) for more information.
*/
-#if (__GNUC__ >= 4) && !defined(SD_EXPORT_SYMBOLS)
+#ifndef _sd_printf_attr_
+#if __GNUC__ >= 4
#define _sd_printf_attr_(a,b) __attribute__ ((format (printf, a, b)))
-#define _sd_hidden_ __attribute__ ((visibility("hidden")))
#else
#define _sd_printf_attr_(a,b)
+#endif
+#endif
+
+#ifndef _sd_hidden_
+#if (__GNUC__ >= 4) && !defined(SD_EXPORT_SYMBOLS)
+#define _sd_hidden_ __attribute__ ((visibility("hidden")))
+#else
#define _sd_hidden_
#endif
+#endif
/*
Log levels for usage on stderr: