From 7bbde67cb2dc52c04bd7020689a1227bddfa1b06 Mon Sep 17 00:00:00 2001 From: Damien George Date: Wed, 6 Feb 2019 01:12:51 +1100 Subject: [PATCH] lib/utils/printf: Exclude __GI_vsnprintf alias for gcc 9 and above. See issue #4457. Signed-off-by: Fabrice Fontaine [Retrieved from: https://github.com/micropython/micropython/commit/7bbde67cb2dc52c04bd7020689a1227bddfa1b06] --- lib/utils/printf.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/lib/utils/printf.c b/lib/utils/printf.c index 1ceeea39ff..0c21fc4c0a 100644 --- a/lib/utils/printf.c +++ b/lib/utils/printf.c @@ -99,9 +99,11 @@ STATIC void strn_print_strn(void *data, const char *str, size_t len) { strn_print_env->remain -= len; } -#if defined(__GNUC__) && !defined(__clang__) +#if defined(__GNUC__) && !defined(__clang__) && __GNUC__ < 9 // uClibc requires this alias to be defined, or there may be link errors // when linkings against it statically. +// GCC 9 gives a warning about missing attributes so it's excluded until +// uClibc+GCC9 support is needed. int __GI_vsnprintf(char *str, size_t size, const char *fmt, va_list ap) __attribute__((weak, alias ("vsnprintf"))); #endif