From f4e1f508245d8af21f8167a348a99ba016dc634e Mon Sep 17 00:00:00 2001
From: Naoki Mizuno <mizuno.naoki@rm.is.tohoku.ac.jp>
Date: Sun, 9 Dec 2018 06:35:08 +0900
Subject: [PATCH] Fix compilation error on Ubuntu 18.04 (ROS Melodic)

---
 CMakeLists.txt | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 8297219..7f6b833 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 2.8.3)
+cmake_minimum_required(VERSION 3.1.3)
 project(loam_velodyne)
 
 find_package(catkin REQUIRED COMPONENTS
@@ -29,7 +29,8 @@ catkin_package(
 
 ## Compile as C++14, supported in ROS Kinetic and newer
 # set_property(TARGET invz_player PROPERTY CXX_STANDARD 17)
-add_compile_options(-std=c++14)
+set(CMAKE_CXX_STANDARD 14)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
 
 add_definitions( -march=native )