From 5548b5999bc5693597305eec7899295f5b8e075f Mon Sep 17 00:00:00 2001
From: Ayke van Laethem <aykevanlaethem@gmail.com>
Date: Wed, 12 Oct 2022 19:14:41 +0200
Subject: [PATCH] Makefile: add ASAN=1 flag to build with AddressSanitizer
 enabled

This sanitizer is useful to detect use-after-free, double free, buffer
overflows, and more such errors.

I've found it useful lately to detect some bugs in TinyGo, and having a
single flag to enable it makes it much easier to enable
AddressSanitizer.
---
 Makefile | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Makefile b/Makefile
index 99f67c29..4345290b 100644
--- a/Makefile
+++ b/Makefile
@@ -56,6 +56,12 @@ else
     LLVM_OPTION += '-DLLVM_ENABLE_ASSERTIONS=OFF'
 endif
 
+# Enable AddressSanitizer
+ifeq (1, $(ASAN))
+    LLVM_OPTION += -DLLVM_USE_SANITIZER=Address
+    CGO_LDFLAGS += -fsanitize=address
+endif
+
 ifeq (1, $(STATIC))
     # Build TinyGo as a fully statically linked binary (no dynamically loaded
     # libraries such as a libc). This is not supported with glibc which is used