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