From eb6b602095d177a61eafe86d5da567a971697e86 Mon Sep 17 00:00:00 2001
From: hqwrong <lazyrobot@protonmail.com>
Date: Thu, 22 Mar 2018 17:35:44 +0800
Subject: [PATCH] fix build error on macos

---
 CMakeLists.txt | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 21182d33..ddcf39b6 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -184,7 +184,11 @@ if(ASAN)
 else()
   # Forbid undefined symbols in shared libraries. This is incompatible with
   # asan, so it's in the else branch here.
-  add_dllflag("-Wl,-z,defs")
+  if(APPLE)
+    add_dllflag("-undefined error")
+  else()
+    add_dllflag("-Wl,-z,defs")
+  endif()
 endif()
 
 option(USE_IPV6 "Use IPv6 in tests" ON)