Replace most gcc format attributes by macro GCC_FMT_ATTR (format checking)

Since version 4.4.x, gcc supports additional format attributes.
    __attribute__ ((format (gnu_printf, 1, 2)))
should be used instead of
    __attribute__ ((format (printf, 1, 2))
because QEMU always uses standard format strings (even with mingw32).

The patch replaces format attribute printf / __printf__ by macro
GCC_FMT_ATTR which uses gnu_printf if supported.

It also removes an #ifdef __GNUC__ (not needed any longer).

Cc: Blue Swirl <blauwirbel@gmail.com>
Signed-off-by: Stefan Weil <weil@mail.berlios.de>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>

1 files changed, 1 insertions, 2 deletions

diff --git a/qjson.h b/qjson.h
index 7afec2eec1..7eef357354 100644
--- a/qjson.h
+++ b/qjson.h
@@ -19,8 +19,7 @@
 #include "qstring.h"
 
 QObject *qobject_from_json(const char *string);
-QObject *qobject_from_jsonf(const char *string, ...)
-    __attribute__((__format__ (__printf__, 1, 2)));
+QObject *qobject_from_jsonf(const char *string, ...) GCC_FMT_ATTR(1, 2);
 QObject *qobject_from_jsonv(const char *string, va_list *ap);
 
 QString *qobject_to_json(const QObject *obj);