From: Stephen Hemminger <stephen@networkplumber.org>
Date: Tue, 11 Jan 2022 17:54:37 +0000 (-0800)
Subject: libbpf: fix clang warning about format non-literal
X-Git-Tag: v5.18.0~62^2~1
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=bf71c8f214b786f3180ebb7a6444ca75c75d8bfd;p=thirdparty%2Fiproute2.git

libbpf: fix clang warning about format non-literal

Add format attribute to the format string in print routines.

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: David Ahern <dsahern@kernel.org>
---

diff --git a/lib/bpf_libbpf.c b/lib/bpf_libbpf.c
index 50ef16bd4..921716aec 100644
--- a/lib/bpf_libbpf.c
+++ b/lib/bpf_libbpf.c
@@ -23,12 +23,14 @@
 
 #include "bpf_util.h"
 
-static int verbose_print(enum libbpf_print_level level, const char *format, va_list args)
+static int __attribute__((format(printf, 2, 0)))
+verbose_print(enum libbpf_print_level level, const char *format, va_list args)
 {
 	return vfprintf(stderr, format, args);
 }
 
-static int silent_print(enum libbpf_print_level level, const char *format, va_list args)
+static int __attribute__((format(printf, 2, 0)))
+silent_print(enum libbpf_print_level level, const char *format, va_list args)
 {
 	if (level > LIBBPF_WARN)
 		return 0;