Change qmake to cmake and build sfml statically

.gitignore

@@ -1 +1,2 @@
 *.user
+SFML-2.5.1

CMakeLists.txt

@@ -0,0 +1,34 @@
+cmake_minimum_required(VERSION 3.5)
+
+project(sliding-puzzle LANGUAGES CXX)
+
+set(CMAKE_CXX_STANDARD 17)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+set(SOURCES application.cpp board.cpp main.cpp)
+set(HEADER_FILES application.h board.h filepath_util.h output_util.h)
+
+set(SFML_STATIC_LIBRARIES TRUE) #set to FALSE if you have sfml installed from package manager and you don't want to link it statically
+
+# STATIC #
+# You need to build SFML from sources with cmake
+if (SFML_STATIC_LIBRARIES)
+    set(SFML_LIB_DIR
+        ${CMAKE_SOURCE_DIR}/SFML-2.5.1/lib/libsfml-graphics.so
+        ${CMAKE_SOURCE_DIR}/SFML-2.5.1/lib/libsfml-system.so
+        ${CMAKE_SOURCE_DIR}/SFML-2.5.1/lib/libsfml-window.so)
+    set(SFML_INCL_DIR ${CMAKE_SOURCE_DIR}/SFML-2.5.1/include)
+
+    include_directories(${SFML_INCL_DIR})
+
+    add_executable(sliding-puzzle ${SOURCES} ${HEADER_FILES} )
+    target_link_libraries(sliding-puzzle ${SFML_LIB_DIR})
+endif()
+
+# DYNAMIC #
+# You only need to install SFML from your package manager
+if (NOT SFML_STATIC_LIBRARIES)
+    find_package(SFML REQUIRED graphics window system)
+    include_directories(${SFML_INCLUDE_DIR})
+    add_executable(sliding-puzzle ${SOURCES} ${HEADER_FILES} )
+    target_link_libraries(sliding-puzzle ${SFML_LIBRARIES} ${SFML_DEPENDENCIES})
+endif()

application.cpp

@@ -1,4 +1,5 @@
 #include <SFML/Window/Event.hpp>
+#include <SFML/System/Time.hpp>
 #include "application.h"
 
 // Hardcoded for now

sliding-puzzle.pro

@@ -1,18 +0,0 @@
-TEMPLATE = app
-QMAKE_CXXFLAGS = -Wall -Werror -Wextra -Wpedantic -Wconversion -std=c++17 -O2 -g
-CONFIG += c++17
-CONFIG -= app_bundle
-CONFIG -= qt
-
-SOURCES += \
-        board.cpp \
-        application.cpp \
-        main.cpp
-
-HEADERS += \
-        board.h \
-        filepath_util.h \
-        application.h \
-        output_util.h
-
-unix:LIBS += -lsfml-graphics -lsfml-audio -lsfml-window -lsfml-system