add --enable-sanitize config option

Change-Id: I83c7b16baeffd3b7ae86edf87a9bb4cbb7346609

configure.ac

@@ -40,6 +40,19 @@ AM_CONDITIONAL(HAVE_LIBXML2, test "$found_libxml2" = yes)
 # Checks for library functions.
 AC_FUNC_MALLOC
 AC_CHECK_FUNCS([memset])
+
+AC_ARG_ENABLE(sanitize,
+	[AS_HELP_STRING(
+		[--enable-sanitize],
+		[Compile with address sanitizer enabled],
+	)],
+	[sanitize=$enableval], [sanitize="no"])
+if test x"$sanitize" = x"yes"
+then
+	CFLAGS="$CFLAGS -fsanitize=address -fsanitize=undefined"
+	CPPFLAGS="$CPPFLAGS -fsanitize=address -fsanitize=undefined"
+fi
+
 AC_OUTPUT([Makefile
            def_frame/Makefile
            def_list/Makefile