Add small CMake improvements

- Use spaces instead of tabs
- Use GLOB_RECURSE to find all source files

CMakeLists.txt

@@ -6,29 +6,32 @@ project(CMakeSFMLProject LANGUAGES CXX)
 option(CMAKESFMLPROJECT_STATIC_LIBS "Link SFML libraries statically?" OFF)
 option(CMAKESFMLPROJECT_STATIC_STD_LIBS "Use statically linked standard/runtime libraries? This option must match the one used for SFML." OFF)
 
+# Find all source files
+file(GLOB_RECURSE SOURCE_FILES CONFIGURE_DEPENDS ${PROJECT_SOURCE_DIR}/src/*.cpp ${PROJECT_SOURCE_DIR}/src/*.hpp)
+
 # Tell CMake to build a executable
-add_executable(${PROJECT_NAME} src/main.cpp)
+add_executable(${PROJECT_NAME} ${SOURCE_FILES})
 
 # CMake SFML Project uses C++17 features
 target_compile_features(${PROJECT_NAME} PRIVATE cxx_std_17)
 set_target_properties(${PROJECT_NAME} PROPERTIES CXX_EXTENSIONS NO CXX_STANDARD_REQUIRED YES)
 
 # Make sure that the runtime library gets linked statically
 if(CMAKESFMLPROJECT_STATIC_STD_LIBS)
-	if(NOT CMAKESFMLPROJECT_STATIC_LIBS)
-		message("\n-> If you check CMAKESFMLPROJECT_STATIC_STD_LIBS, you also need to check CMAKESFMLPROJECT_STATIC_LIBS.")
-		message("-> It would lead to multiple runtime environments which results in undefined behavior.\n")
-	elseif(WIN32 AND MSVC)
-		set_property(TARGET ${PROJECT_NAME} PROPERTY MSVC_RUNTIME_LIBRARY "MultiThreaded$<$<CONFIG:Debug>:Debug>")
-	elseif(CMAKE_COMPILER_IS_GNUCXX)
-		# Note: Doesn't work for TDM compiler, since it's compiling the runtime libs statically by default
-		target_compile_options(${PROJECT_NAME} PRIVATE -static)
-	endif()
+    if(NOT CMAKESFMLPROJECT_STATIC_LIBS)
+        message("\n-> If you check CMAKESFMLPROJECT_STATIC_STD_LIBS, you also need to check CMAKESFMLPROJECT_STATIC_LIBS.")
+        message("-> It would lead to multiple runtime environments which results in undefined behavior.\n")
+    elseif(WIN32 AND MSVC)
+        set_property(TARGET ${PROJECT_NAME} PROPERTY MSVC_RUNTIME_LIBRARY "MultiThreaded$<$<CONFIG:Debug>:Debug>")
+    elseif(CMAKE_COMPILER_IS_GNUCXX)
+        # Note: Doesn't work for TDM compiler, since it's compiling the runtime libs statically by default
+        target_compile_options(${PROJECT_NAME} PRIVATE -static)
+    endif()
 endif()
 
 # Request static SFML libraries when building statically
 if(CMAKESFMLPROJECT_STATIC_LIBS)
-	set(SFML_STATIC_LIBRARIES TRUE)
+    set(SFML_STATIC_LIBRARIES TRUE)
 endif()
 
 # Find SFML
@@ -39,4 +42,4 @@ target_link_libraries(${PROJECT_NAME} sfml-graphics)
 
 # Install executable
 install(TARGETS ${PROJECT_NAME}
-		RUNTIME DESTINATION .)
+        RUNTIME DESTINATION .)