[PATCH bpf-next] selftests/bpf: allow veristat compile standalone

[Mykyta Yatsenko <mykyta.yatsenko5@xxxxxxxxx>]

From: Mykyta Yatsenko <yatsenko@xxxxxxxx>

Veristat is synced into the standalone repo, where it compiles without
kernel private dependencies. This patch fixes compilation errors in
standalone veristat.

Signed-off-by: Mykyta Yatsenko <yatsenko@xxxxxxxx>
---
 tools/testing/selftests/bpf/veristat.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/tools/testing/selftests/bpf/veristat.c b/tools/testing/selftests/bpf/veristat.c
index 09cfbd486f92..4b79f00b0a9c 100644
--- a/tools/testing/selftests/bpf/veristat.c
+++ b/tools/testing/selftests/bpf/veristat.c
@@ -23,6 +23,7 @@
 #include <float.h>
 #include <math.h>
 #include <limits.h>
+#include <assert.h>
 
 #ifndef ARRAY_SIZE
 #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
@@ -239,6 +240,14 @@ static int libbpf_print_fn(enum libbpf_print_level level, const char *format, va
 
 #define log_errno(fmt, ...) log_errno_aux(__FILE__, __LINE__, fmt, ##__VA_ARGS__)
 
+#ifndef __printf
+#define __printf(a, b)	__attribute__((format(printf, a, b)))
+#endif
+
+#ifndef __scanf
+#define __scanf(a, b)	__attribute__((format(scanf, a, b)))
+#endif
+
 __printf(3, 4)
 static int log_errno_aux(const char *file, int line, const char *fmt, ...)
 {
-- 
2.50.0