Force c++17 standard so we can use filesystem std lib. Currently will only work on gcc until cmake update.

CMakeLists.txt

@@ -1,7 +1,8 @@
 cmake_minimum_required(VERSION 3.1)
 project(arbitrateor)
-set(CMAKE_CXX_STANDARD 11)
+set(CMAKE_CXX_STANDARD 11) #Change to 17 when possible for filesystem support
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=gnu++1z") #Until then, force c++17 where we can.
 
 set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_SOURCE_DIR}/cmake")
 

src/GroovePlayer.cpp

@@ -23,6 +23,7 @@
 #include <Wt/WServer>
 #include <Wt/WApplication>
 #include "WebInterface.h"
+#include <experimental/filesystem> //TODO:Change to non-gcc way when officially using c++17
 
 GroovePlayer::GroovePlayer(std::string dbFile) : sqliteConnection(dbFile)
 {