From 62b6ccb03e8381b094eb3a92c6840fe4d2daf18f Mon Sep 17 00:00:00 2001
From: "Uwe L. Korn" <uwe.korn@quantco.com>
Date: Tue, 15 Dec 2020 11:03:20 +0100
Subject: [PATCH] Check for march=native before using it

---
 CMakeLists.txt | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index c2deae13..ca7a6faa 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -187,7 +187,10 @@ endif()
 
 # Architecture flags
 if(${CMAKE_HOST_SYSTEM_PROCESSOR} MATCHES "arm" AND NOT APPLE)
-    list(APPEND mi_cflags -march=native)
+    check_cxx_compiler_flag(-march=native CXX_SUPPORTS_MARCH_NATIVE)
+    if (CXX_SUPPORTS_MARCH_NATIVE)
+        list(APPEND mi_cflags -march=native)
+    endif()
 endif()
 
 # extra needed libraries