[kvm-unit-tests PATCH v2 1/4] lib: *printf: warn on format/arg mismatch

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Suggested-by: Thomas Huth <thuth@xxxxxxxxxx>
Signed-off-by: Andrew Jones <drjones@xxxxxxxxxx>
---
 lib/libcflat.h | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/lib/libcflat.h b/lib/libcflat.h
index 1f0049c74ff89..59c9c6e3b0d91 100644
--- a/lib/libcflat.h
+++ b/lib/libcflat.h
@@ -51,13 +51,17 @@ typedef _Bool		bool;
 extern void puts(const char *s);
 extern void exit(int code);
 extern void abort(void);
-
-extern int printf(const char *fmt, ...);
-extern int snprintf(char *buf, int size, const char *fmt, ...);
-extern int vsnprintf(char *buf, int size, const char *fmt, va_list va);
-extern int vprintf(const char *fmt, va_list va);
 extern long atol(const char *ptr);
 
+extern int printf(const char *fmt, ...)
+					__attribute__((format(printf, 1, 2)));
+extern int snprintf(char *buf, int size, const char *fmt, ...)
+					__attribute__((format(printf, 3, 4)));
+extern int vsnprintf(char *buf, int size, const char *fmt, va_list va)
+					__attribute__((format(printf, 3, 0)));
+extern int vprintf(const char *fmt, va_list va)
+					__attribute__((format(printf, 1, 0)));
+
 extern void report_prefix_push(const char *prefix);
 extern void report_prefix_pop(void);
 extern void report(const char *msg_fmt, bool pass, ...);
-- 
2.4.3

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