util: Add printf format GCC attribute to panic() function

This fixes the following GCC warning:

  util.h:55:2: warning: function might be possible candidate for ‘gnu_printf’ format attribute [-Wsuggest-attribute=format]

Signed-off-by: Tobias Klauser <tklauser@distanz.ch>

1 files changed, 3 insertions, 1 deletions

diff --git a/util.h b/util.h
index 0c3d263..1fabd5e 100644
--- a/util.h
+++ b/util.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2014-2015 Tobias Klauser <tklauser@distanz.ch>
+ * Copyright (C) 2014-2017 Tobias Klauser <tklauser@distanz.ch>
  * Copyright (C) 2009-2012 Daniel Borkmann
  *
  * This file is part of llmnrd.
@@ -47,6 +47,8 @@
 	(void) (&_max1 == &_max2);	\
 	_max1 > _max2 ? _max1 : _max2; })
 
+static inline void panic(const char *fmt, ...) __check_format_printf(1, 2);
+
 static inline void __noreturn panic(const char *fmt, ...)
 {
 	va_list vl;