maint: update copyright

[gnulib.git] / lib / xprintf.h

diff --git a/lib/xprintf.h b/lib/xprintf.h
index e650c94..96fbcfa 100644 (file)
--- a/lib/xprintf.h
+++ b/lib/xprintf.h
@@ -1,5 +1,5 @@
 /* printf wrappers that fail immediately for non-file-related errors
-   Copyright (C) 2007-2009 Free Software Foundation, Inc.
+   Copyright (C) 2007-2014 Free Software Foundation, Inc.
 
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -20,27 +20,26 @@
 #include <stdarg.h>
 #include <stdio.h>
 
-#ifndef __attribute__
-/* This feature is available in gcc versions 2.5 and later.  */
-# if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 5)
-#  define __attribute__(Spec)   /* empty */
-# endif
-/* The __-protected variants of `format' and `printf' attributes
-   are accepted by gcc versions 2.6.4 (effectively 2.7) and later.  */
-# if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 7)
-#  define __format__ format
-#  define __printf__ printf
-# endif
+/* The __attribute__ feature is available in gcc versions 2.5 and later.
+   The __-protected variants of the attributes 'format' and 'printf' are
+   accepted by gcc versions 2.6.4 (effectively 2.7) and later.
+   We enable _GL_ATTRIBUTE_FORMAT only if these are supported too, because
+   gnulib and libintl do '#define printf __printf__' when they override
+   the 'printf' function.  */
+#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 7)
+# define _GL_ATTRIBUTE_FORMAT(spec) __attribute__ ((__format__ spec))
+#else
+# define _GL_ATTRIBUTE_FORMAT(spec) /* empty */
 #endif
 
 extern int xprintf (char const *restrict format, ...)
-  __attribute__ ((__format__ (__printf__, 1, 2)));
+  _GL_ATTRIBUTE_FORMAT ((__printf__, 1, 2));
 extern int xvprintf (char const *restrict format, va_list args)
-  __attribute__ ((__format__ (__printf__, 1, 0)));
+  _GL_ATTRIBUTE_FORMAT ((__printf__, 1, 0));
 extern int xfprintf (FILE *restrict stream, char const *restrict format, ...)
-  __attribute__ ((__format__ (__printf__, 2, 3)));
+  _GL_ATTRIBUTE_FORMAT ((__printf__, 2, 3));
 extern int xvfprintf (FILE *restrict stream, char const *restrict format,
                       va_list args)
-  __attribute__ ((__format__ (__printf__, 2, 0)));
+  _GL_ATTRIBUTE_FORMAT ((__printf__, 2, 0));
 
 #endif