Improve CMake to separate built and dynamically installed SFML

CMakeLists.txt

@@ -2,32 +2,33 @@ cmake_minimum_required(VERSION 3.5)
 
 project(project-kyoku LANGUAGES CXX)
 
-set(CMAKE_CXX_STANDARD 14)
+set(CMAKE_CXX_STANDARD 17)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Werror -Wextra -Wpedantic -g")
+
 set(CMAKE_THREAD_LIBS_INIT "-lpthread")
       SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -pthread")
       set(CMAKE_HAVE_THREADS_LIBRARY 1)
       set(CMAKE_USE_WIN32_THREADS_INIT 0)
       set(CMAKE_USE_PTHREADS_INIT 1)
       set(THREADS_PREFER_PTHREAD_FLAG ON)
-file(GLOB_RECURSE SOURCES "include/*.h" "src/*.cpp" "src/*.h")
 
-# STATIC #
-# You need to build SFML from sources with cmake
-set(SFML_LIB_DIR
-    ${CMAKE_SOURCE_DIR}/SFML-2.5.1/lib/libsfml-graphics.so.2.5
-    ${CMAKE_SOURCE_DIR}/SFML-2.5.1/lib/libsfml-system.so.2.5
-    ${CMAKE_SOURCE_DIR}/SFML-2.5.1/lib/libsfml-window.so.2.5
-    ${CMAKE_SOURCE_DIR}/SFML-2.5.1/lib/libsfml-audio.so.2.5)
-set(SFML_INCL_DIR ${CMAKE_SOURCE_DIR}/SFML-2.5.1/include)
-include_directories(${SFML_INCL_DIR} ${CMAKE_SOURCE_DIR}/include)
+file(GLOB_RECURSE SOURCES "include/*.h" "src/*.cpp" "src/*.h")
 add_executable(project-kyoku ${SOURCES})
-target_link_libraries(project-kyoku ${SFML_LIB_DIR})
 
-# DYNAMIC #
-# You only need to install SFML from your package manager
-#find_package(SFML REQUIRED graphics window system)
-#add_executable(project-kyoku ${SOURCES})
-#include_directories(${SFML_INCL_DIR} ${CMAKE_SOURCE_DIR}/include)
-#target_link_libraries(project-kyoku sfml-system sfml-audio sfml-graphics sfml-network)
+option(SFML_BUILT "SFML_BUILT" ON)
+
+if(SFML_BUILT)
+    set(SFML_LIB_DIR
+        ${CMAKE_SOURCE_DIR}/SFML-2.5.1/lib/libsfml-graphics.so.2.5
+        ${CMAKE_SOURCE_DIR}/SFML-2.5.1/lib/libsfml-system.so.2.5
+        ${CMAKE_SOURCE_DIR}/SFML-2.5.1/lib/libsfml-window.so.2.5
+        ${CMAKE_SOURCE_DIR}/SFML-2.5.1/lib/libsfml-audio.so.2.5)
+    set(SFML_INCL_DIR ${CMAKE_SOURCE_DIR}/SFML-2.5.1/include)
+    target_link_libraries(project-kyoku ${SFML_LIB_DIR})
+else()
+    find_package(SFML)
+    target_link_libraries(project-kyoku sfml-system sfml-audio sfml-graphics sfml-network)
+endif()
+
+include_directories(${SFML_INCL_DIR} ${CMAKE_SOURCE_DIR}/include)