From 843f3a61ae2681dd65da6b48ffb314f2e997c2b8 Mon Sep 17 00:00:00 2001
From: TheAssassin <theassassin@assassinate-you.net>
Date: Sat, 30 Jun 2018 15:13:25 +0200
Subject: [PATCH] Make CMake require C++17

Requires CMake 3.8+ which is the first version to support C++17 (see https://cmake.org/cmake/help/v3.8/prop_tgt/CXX_STANDARD.html).

Fixes #7749.
---
 CMakeLists.txt | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3401d6efe4..af02a4b55c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,5 +1,5 @@
 # CMAKE project for openrct2
-cmake_minimum_required(VERSION 3.1)
+cmake_minimum_required(VERSION 3.8)
 if (CMAKE_BINARY_DIR STREQUAL CMAKE_SOURCE_DIR)
     message(FATAL_ERROR "Building in-source is not supported! Create a build dir and remove ${CMAKE_SOURCE_DIR}/CMakeCache.txt")
 endif()
@@ -12,6 +12,9 @@ endif ()
 include(CheckCXXCompilerFlag)
 include(GNUInstallDirs)
 
+set(CMAKE_CXX_STANDARD 17)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+
 set(ROOT_DIR "${CMAKE_CURRENT_LIST_DIR}")
 set(CMAKE_MACOSX_RPATH 1)