From cc80e34cd9b1c03649e01c7ac958baa11329b404 Mon Sep 17 00:00:00 2001
From: Benjamin Valentin <benjamin.valentin@ml-pa.com>
Date: Sun, 22 Dec 2024 16:56:35 +0100
Subject: [PATCH] cpu/avr8_common: don't implement perror() with stdio_null

---
 cpu/avr8_common/avr_libc_extra/posix_unistd.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/cpu/avr8_common/avr_libc_extra/posix_unistd.c b/cpu/avr8_common/avr_libc_extra/posix_unistd.c
index 55b50f2285..71e6846a74 100644
--- a/cpu/avr8_common/avr_libc_extra/posix_unistd.c
+++ b/cpu/avr8_common/avr_libc_extra/posix_unistd.c
@@ -177,9 +177,11 @@ ssize_t write(int fd, const void *src, size_t count)
 #endif
 }
 
+#ifndef MODULE_STDIO_NULL
 void perror(const char *s)
 {
     printf("%s: %s\n", s, strerror(errno));
 }
+#endif
 
 /** @} */