[Qemu-devel] [PATCH 1/3] Replace most gcc format attributes by macro GCC_FMT_ATTR (format checking)

[Stefan Weil]

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 <address@hidden>
Signed-off-by: Stefan Weil <address@hidden>
---
 audio/audio.h      |    6 +-----
 bsd-user/qemu.h    |    2 +-
 darwin-user/qemu.h |    2 +-
 hw/xen_backend.h   |    2 +-
 linux-user/qemu.h  |    2 +-
 monitor.h          |    3 +--
 qemu-common.h      |    3 +--
 qemu-error.h       |    7 +++----
 qerror.h           |    3 +--
 qjson.h            |    3 +--
 10 files changed, 12 insertions(+), 21 deletions(-)

diff --git a/audio/audio.h b/audio/audio.h
index 454ade2..39a0631 100644
--- a/audio/audio.h
+++ b/audio/audio.h
@@ -87,11 +87,7 @@ typedef struct QEMUAudioTimeStamp {
 } QEMUAudioTimeStamp;
 
 void AUD_vlog (const char *cap, const char *fmt, va_list ap);
-void AUD_log (const char *cap, const char *fmt, ...)
-#ifdef __GNUC__
-    __attribute__ ((__format__ (__printf__, 2, 3)))
-#endif
-    ;
+void AUD_log (const char *cap, const char *fmt, ...) GCC_FMT_ATTR(2, 3);
 
 void AUD_help (void);
 void AUD_register_card (const char *name, QEMUSoundCard *card);
diff --git a/bsd-user/qemu.h b/bsd-user/qemu.h
index 554ff8b..9763616 100644
--- a/bsd-user/qemu.h
+++ b/bsd-user/qemu.h
@@ -139,7 +139,7 @@ abi_long do_netbsd_syscall(void *cpu_env, int num, abi_long 
arg1,
 abi_long do_openbsd_syscall(void *cpu_env, int num, abi_long arg1,
                             abi_long arg2, abi_long arg3, abi_long arg4,
                             abi_long arg5, abi_long arg6);
-void gemu_log(const char *fmt, ...) __attribute__((format(printf,1,2)));
+void gemu_log(const char *fmt, ...) GCC_FMT_ATTR(1, 2);
 extern THREAD CPUState *thread_env;
 void cpu_loop(CPUState *env);
 char *target_strerror(int err);
diff --git a/darwin-user/qemu.h b/darwin-user/qemu.h
index 462bbda..0c5081b 100644
--- a/darwin-user/qemu.h
+++ b/darwin-user/qemu.h
@@ -99,7 +99,7 @@ int do_sigaction(int sig, const struct sigaction *act,
                  struct sigaction *oact);
 int do_sigaltstack(const struct sigaltstack *ss, struct sigaltstack *oss);
 
-void gemu_log(const char *fmt, ...) __attribute__((format(printf,1,2)));
+void gemu_log(const char *fmt, ...) GCC_FMT_ATTR(1, 2);
 void qerror(const char *fmt, ...);
 
 void write_dt(void *ptr, unsigned long addr, unsigned long limit, int flags);
diff --git a/hw/xen_backend.h b/hw/xen_backend.h
index 292126d..1b428e3 100644
--- a/hw/xen_backend.h
+++ b/hw/xen_backend.h
@@ -84,7 +84,7 @@ int xen_be_bind_evtchn(struct XenDevice *xendev);
 void xen_be_unbind_evtchn(struct XenDevice *xendev);
 int xen_be_send_notify(struct XenDevice *xendev);
 void xen_be_printf(struct XenDevice *xendev, int msg_level, const char *fmt, 
...)
-    __attribute__ ((format(printf, 3, 4)));
+    GCC_FMT_ATTR(3, 4);
 
 /* actual backend drivers */
 extern struct XenDevOps xen_console_ops;      /* xen_console.c     */
diff --git a/linux-user/qemu.h b/linux-user/qemu.h
index 794fe49..708021e 100644
--- a/linux-user/qemu.h
+++ b/linux-user/qemu.h
@@ -186,7 +186,7 @@ void syscall_init(void);
 abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
                     abi_long arg2, abi_long arg3, abi_long arg4,
                     abi_long arg5, abi_long arg6);
-void gemu_log(const char *fmt, ...) __attribute__((format(printf,1,2)));
+void gemu_log(const char *fmt, ...) GCC_FMT_ATTR(1, 2);
 extern THREAD CPUState *thread_env;
 void cpu_loop(CPUState *env);
 char *target_strerror(int err);
diff --git a/monitor.h b/monitor.h
index 38b22a4..185cc3e 100644
--- a/monitor.h
+++ b/monitor.h
@@ -50,8 +50,7 @@ int monitor_read_bdrv_key_start(Monitor *mon, 
BlockDriverState *bs,
 int monitor_get_fd(Monitor *mon, const char *fdname);
 
 void monitor_vprintf(Monitor *mon, const char *fmt, va_list ap);
-void monitor_printf(Monitor *mon, const char *fmt, ...)
-    __attribute__ ((__format__ (__printf__, 2, 3)));
+void monitor_printf(Monitor *mon, const char *fmt, ...) GCC_FMT_ATTR(2, 3);
 void monitor_print_filename(Monitor *mon, const char *filename);
 void monitor_flush(Monitor *mon);
 
diff --git a/qemu-common.h b/qemu-common.h
index 88c5207..81aafa0 100644
--- a/qemu-common.h
+++ b/qemu-common.h
@@ -196,8 +196,7 @@ int qemu_pipe(int pipefd[2]);
 
 /* Error handling.  */
 
-void QEMU_NORETURN hw_error(const char *fmt, ...)
-    __attribute__ ((__format__ (__printf__, 1, 2)));
+void QEMU_NORETURN hw_error(const char *fmt, ...) GCC_FMT_ATTR(1, 2);
 
 /* IO callbacks.  */
 typedef void IOReadHandler(void *opaque, const uint8_t *buf, int size);
diff --git a/qemu-error.h b/qemu-error.h
index a45609f..531ec63 100644
--- a/qemu-error.h
+++ b/qemu-error.h
@@ -31,11 +31,10 @@ void loc_set_cmdline(char **argv, int idx, int cnt);
 void loc_set_file(const char *fname, int lno);
 
 void error_vprintf(const char *fmt, va_list ap);
-void error_printf(const char *fmt, ...) __attribute__ ((format(printf, 1, 2)));
-void error_printf_unless_qmp(const char *fmt, ...)
-    __attribute__ ((format(printf, 1, 2)));
+void error_printf(const char *fmt, ...) GCC_FMT_ATTR(1, 2);
+void error_printf_unless_qmp(const char *fmt, ...) GCC_FMT_ATTR(1, 2);
 void error_print_loc(void);
 void error_set_progname(const char *argv0);
-void error_report(const char *fmt, ...) __attribute__ ((format(printf, 1, 2)));
+void error_report(const char *fmt, ...) GCC_FMT_ATTR(1, 2);
 
 #endif
diff --git a/qerror.h b/qerror.h
index 62802ea..f2984dd 100644
--- a/qerror.h
+++ b/qerror.h
@@ -38,8 +38,7 @@ QError *qerror_from_info(const char *file, int linenr, const 
char *func,
 QString *qerror_human(const QError *qerror);
 void qerror_print(QError *qerror);
 void qerror_report_internal(const char *file, int linenr, const char *func,
-                            const char *fmt, ...)
-    __attribute__ ((format(printf, 4, 5)));
+                            const char *fmt, ...) GCC_FMT_ATTR(4, 5);
 #define qerror_report(fmt, ...) \
     qerror_report_internal(__FILE__, __LINE__, __func__, fmt, ## __VA_ARGS__)
 QError *qobject_to_qerror(const QObject *obj);
diff --git a/qjson.h b/qjson.h
index 7afec2e..7eef357 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);
-- 
1.7.1