From 40b08c5f179ae553b22b14e5aa55fe18f925e11a Mon Sep 17 00:00:00 2001
From: Sen Han <00hnes@gmail.com>
Date: Wed, 25 Jul 2018 19:47:15 +0800
Subject: [PATCH] add more strict macro definition check

---
 aco.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/aco.h b/aco.h
index e4a6f32..b1db94a 100644
--- a/aco.h
+++ b/aco.h
@@ -136,6 +136,9 @@ struct aco_s{
     }   \
 } while(0)
 
+#if defined(aco_attr_no_asan)
+    #error "aco_attr_no_asan already defined"
+#endif
 #if defined(ACO_USE_ASAN)
     #if defined(__has_feature)
         #if __has_feature(address_sanitizer)