fix: tested on linux, made necessary changes

Author: umut-er

Makefile

@@ -1,7 +1,6 @@
 CC=g++
 CFLAGS=-Wall -O2
-# IFLAGS=-I"C:/MinGW-SDL/include"
-LFLAGS=-lmingw32 -lSDL2 -lSDL2main -lstdc++
+LFLAGS=-lSDL2 -lSDL2main -lstdc++
 
 DEP=deps
 DEPFLAGS=-MT $@ -MMD -MP -MF $(DEP)/$*.d
@@ -14,9 +13,9 @@ OBJS=$(patsubst $(SRC)/%.cpp, $(OBJ)/%.o, $(SRCS))
 BINDIR=bin
 BIN=$(BINDIR)/main
 
-
 all: $(BIN)
 
+
 $(BIN): $(OBJS) | $(BINDIR)
 	$(CC) $(CFLAGS) $(OBJS) $(LFLAGS) -o $@
 

inc/Generation.h

@@ -8,7 +8,7 @@ class Generation{
 	~Generation();
 
 	struct Cmp{
-		bool operator()(const std::pair<std::pair<int, int>, Color>&, const std::pair<std::pair<int, int>, Color>&);
+		bool operator()(const std::pair<std::pair<int, int>, Color>&, const std::pair<std::pair<int, int>, Color>&) const;
 	};
 
 	void calculateNextGen();

src/Generation.cpp

@@ -75,7 +75,7 @@ int Generation::cnt(std::pair<int,int> p){
 	return ret;
 }
 
-bool Generation::Cmp::operator()(const std::pair<std::pair<int, int>, Color>& lhs, const std::pair<std::pair<int, int>, Color>& rhs){
+bool Generation::Cmp::operator()(const std::pair<std::pair<int, int>, Color>& lhs, const std::pair<std::pair<int, int>, Color>& rhs) const{
 	if(lhs.first.second < rhs.first.second) return true;
 	if(lhs.first.second == rhs.first.second){
 		if(lhs.first.first < rhs.first.first)

src/GoL.cpp

@@ -45,7 +45,7 @@ void GoL::run(){
 void GoL::initSystems(){
 	SDL_Init(SDL_INIT_VIDEO | SDL_INIT_EVENTS | SDL_INIT_TIMER);
 
-	_window = SDL_CreateWindow("Game of Life", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, _screenWidth, _screenHeight, SDL_WINDOW_SHOWN);
+	SDL_window = SDL_CreateWindow("Game of Life", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, _screenWidth, _screenHeight, SDL_WINDOW_SHOWN);
 	if(_window == nullptr) fatalError("SDL Window could not be created!");
 
 	SDL_RaiseWindow(_window);