From ca7c03f825e1660b83cf163dc08ce7f880dfe0a7 Mon Sep 17 00:00:00 2001
From: Christoph Schulz <schulzcbs@gmail.com>
Date: Sun, 9 Sep 2018 23:24:33 +0200
Subject: [PATCH] Add instead of replace linker flags (fix for LLVM toolchain)

---
 CMakeLists.txt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 225e287a..bdf867be 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -992,7 +992,7 @@ endif()
 if (MSVC)
   # Suppress linker warnings caused by #ifdef omission
   # of file content.
-  set( CMAKE_STATIC_LINKER_FLAGS /ignore:4221 )
+  set(CMAKE_STATIC_LINKER_FLAGS "${CMAKE_STATIC_LINKER_FLAGS} /ignore:4221")
   set (PDB_OUTPUT_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/bin")
   set (PDB_NAME "libzmq${MSVC_TOOLSET}-mt-gd-${ZMQ_VERSION_MAJOR}_${ZMQ_VERSION_MINOR}_${ZMQ_VERSION_PATCH}")
   function(enable_vs_guideline_checker target)