Mark debug_print with __attribute__ ((format(__printf__, 1, 0)))

the drmServerInfo member, debug_print, takes a printf format string
and varargs list. Tell the compiler about it.

Signed-off-by: Keith Packard <keithp@keithp.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>

1 files changed, 7 insertions, 1 deletions

diff --git a/xf86drm.h b/xf86drm.h
index 1e763a3d..5e170f86 100644
--- a/xf86drm.h
+++ b/xf86drm.h
@@ -92,8 +92,14 @@ extern "C" {
 typedef unsigned int  drmSize,     *drmSizePtr;	    /**< For mapped regions */
 typedef void          *drmAddress, **drmAddressPtr; /**< For mapped regions */
 
+#if (__GNUC__ >= 3)
+#define DRM_PRINTFLIKE(f, a) __attribute__ ((format(__printf__, f, a)))
+#else
+#define DRM_PRINTFLIKE(f, a)
+#endif
+
 typedef struct _drmServerInfo {
-  int (*debug_print)(const char *format, va_list ap);
+  int (*debug_print)(const char *format, va_list ap) DRM_PRINTFLIKE(1,0);
   int (*load_module)(const char *name);
   void (*get_perms)(gid_t *, mode_t *);
 } drmServerInfo, *drmServerInfoPtr;