From 2aad2cfc537480a7edd6eb670732b3227906f6aa Mon Sep 17 00:00:00 2001
From: Nicholas Marriott <nicholas.marriott@gmail.com>
Date: Wed, 6 May 2026 08:23:26 +0100
Subject: [PATCH] Add a configure flag for ASAN.

---
 Makefile.am  | 4 ++++
 configure.ac | 9 +++++++++
 2 files changed, 13 insertions(+)

diff --git a/Makefile.am b/Makefile.am
index 3ec467f4..0161999b 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -41,6 +41,10 @@ endif
 AM_CPPFLAGS += -DDEBUG
 endif
 AM_CPPFLAGS += -iquote.
+if IS_ASAN
+AM_CFLAGS += -fsanitize=address
+AM_LDFLAGS += -fsanitize=address
+endif
 endif
 
 # Set flags for Solaris.
diff --git a/configure.ac b/configure.ac
index fa474825..093d855b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -73,6 +73,15 @@ AC_ARG_ENABLE(
 )
 AM_CONDITIONAL(IS_OPTIMIZED, test "x$enable_optimizations" = xyes)
 
+# Is this --enable-asan?
+AC_ARG_ENABLE(
+	asan,
+	AS_HELP_STRING(--enable-asan, enable ASAN build flags),
+	,
+	enable_asan=no
+)
+AM_CONDITIONAL(IS_ASAN, test "x$enable_asan" = xyes)
+
 # Is this a static build?
 AC_ARG_ENABLE(
 	static,