From 6134a046cb1a20d3df527a0c3391e5ab98cf2673 Mon Sep 17 00:00:00 2001
From: Hui Wang <hui.wang@contentsquare.com>
Date: Fri, 6 Mar 2020 14:31:27 +0100
Subject: [PATCH] ignore weak symbol under mac because it must be defined

---
 CMakeLists.txt | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index c0d4cd5504d..2948225583c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -214,6 +214,10 @@ if (COMPILER_CLANG)
     # TODO investigate that
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fno-omit-frame-pointer")
     set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fno-omit-frame-pointer")
+    if (OS_DARWIN)
+        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wl,-U,_inside_main")
+        set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wl,-U,_inside_main")
+    endif()
 endif ()
 
 option (ENABLE_LIBRARIES "Enable all libraries (Global default switch)" ON)