From d417525d67329961417eb9464fff138ffcf57e43 Mon Sep 17 00:00:00 2001
From: Hleb Valoshka <375gnu@gmail.com>
Date: Wed, 20 Oct 2021 18:44:39 +0400
Subject: [PATCH] [cmake] Allow C++ standard definition via command line

---
 CMakeLists.txt | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0c784f5c1..6b90703a8 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -86,7 +86,9 @@ endif()
 add_definitions(-D_USE_MATH_DEFINES)
 
 # Let CMake handle setting C++11 (since 3.1)
-set(CMAKE_CXX_STANDARD 14)
+if(NOT CMAKE_CXX_STANDARD)
+  set(CMAKE_CXX_STANDARD 14)
+endif()
 set(CMAKE_C_STANDARD 11)
 
 # Use our cmake files