From d84f75b4d0147a8268d444be3cfb3726f85898a6 Mon Sep 17 00:00:00 2001
From: Gunar Schorcht <gunar@schorcht.net>
Date: Mon, 12 Aug 2019 17:50:59 +0200
Subject: [PATCH] cpu/atmega_common: activate wrapper functions when linking

---
 makefiles/arch/atmega.inc.mk | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/makefiles/arch/atmega.inc.mk b/makefiles/arch/atmega.inc.mk
index 6636bb4838..0d932d9b1f 100644
--- a/makefiles/arch/atmega.inc.mk
+++ b/makefiles/arch/atmega.inc.mk
@@ -41,6 +41,9 @@ LDSCRIPT_COMPAT = $(if $(shell $(TARGET_ARCH)-ld --verbose | grep __TEXT_REGION_
                     -T$(RIOTCPU)/$(CPU)/ldscripts_compat/avr_2.26.ld)
 LINKFLAGS += $(LDSCRIPT_COMPAT)
 
+# use the wrapper functions for following avr-libc functions
+LINKFLAGS += -Wl,-wrap=malloc -Wl,-wrap=calloc -Wl,-wrap=realloc -Wl,-wrap=free
+
 ifeq ($(LTO),1)
   # avr-gcc <4.8.3 has a bug when using LTO which causes a warning to be printed always:
   # '_vector_25' appears to be a misspelled signal handler [enabled by default]