From 4d8bbe2c9782d457345411f3ceaa9fb8ea31bb55 Mon Sep 17 00:00:00 2001
From: zdenop <zdenop@gmail.com>
Date: Sat, 16 Feb 2019 17:55:45 +0100
Subject: [PATCH] cmake workaround for #2246 for clang

---
 CMakeLists.txt | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index b2a87ef4ff..c61730aead 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -102,6 +102,9 @@ endif()
 
 if(CMAKE_CXX_COMPILER_ID MATCHES "Clang")
   set(CLANG 1)
+  # Force C++11 as workaround for #2246
+  add_definitions(-D__cplusplus=201103L)
+  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-macro-redefined")
 endif()
 
 if (WIN32)