From 36c76c861a26d2d2ce6118df1b20a389b8f3afb1 Mon Sep 17 00:00:00 2001
From: Paul Cercueil <paul@crapouillou.net>
Date: Sun, 19 Nov 2023 12:50:39 +0100
Subject: [PATCH] Makefile: Enable address sanitizer with DEBUG_ASAN=1

The Address Sanitizer (built in GCC and LLVM) is an extremely powerful
tool, moreso than e.g. Valgrind for detecting memory issues.

It is not available on every architecture/OS combination (see
https://github.com/google/sanitizers/wiki/AddressSanitizer), so it can
only be enabled by compiling with DEBUG_ASAN=1.

Signed-off-by: Paul Cercueil <paul@crapouillou.net>
---
 Makefile | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Makefile b/Makefile
index af3e1ab6..6ded0df0 100644
--- a/Makefile
+++ b/Makefile
@@ -6,6 +6,9 @@ CFLAGS += -Wall -ggdb -Iinclude -ffast-math
 ifndef DEBUG
 CFLAGS += -O2 -DNDEBUG
 endif
+ifeq ($(DEBUG_ASAN), 1)
+CFLAGS += -fsanitize=address
+endif
 CFLAGS += -DP_HAVE_MMAP=$(if $(NO_MMAP),0,1) \
 	  -DP_HAVE_PTHREAD=$(if $(NO_PTHREAD),0,1) \
 	  -DP_HAVE_POSIX_MEMALIGN=$(if $(NO_POSIX_MEMALIGN),0,1) \
@@ -36,6 +39,9 @@ endif
 CC_LINK ?= $(CC)
 CC_AS ?= $(CC)
 LDFLAGS += $(MAIN_LDFLAGS)
+ifeq ($(DEBUG_ASAN), 1)
+LDFLAGS += -static-libasan
+endif
 EXTRA_LDFLAGS ?= -Wl,-Map=$@.map
 LDLIBS += $(MAIN_LDLIBS)
 ifdef PCNT
-- 
2.39.5