Set up CMAKE for Linux and Windows.

CMakeLists.txt

@@ -0,0 +1,60 @@
+cmake_minimum_required(VERSION 3.20)
+project(FPS_DRUID LANGUAGES C)
+
+set(CMAKE_C_STANDARD 99)
+set(CMAKE_C_STANDARD_REQUIRED ON)
+
+# Default build type for single-config generators
+if(NOT CMAKE_CONFIGURATION_TYPES AND NOT CMAKE_BUILD_TYPE)
+  set(CMAKE_BUILD_TYPE Debug CACHE STRING "Build type" FORCE)
+endif()
+
+# ---------- Fetch raylib ----------
+include(FetchContent)
+set(FETCHCONTENT_QUIET FALSE)
+set(BUILD_EXAMPLES OFF CACHE BOOL "" FORCE)
+set(BUILD_GAMES    OFF CACHE BOOL "" FORCE)
+
+FetchContent_Declare(
+  raylib
+  GIT_REPOSITORY https://github.com/raysan5/raylib.git
+  GIT_TAG 5.5            # stable release
+  GIT_PROGRESS TRUE
+)
+FetchContent_MakeAvailable(raylib)
+
+# ---------- Paths (match your tree) ----------
+set(SRC_DIR     "${CMAKE_CURRENT_LIST_DIR}/src")
+set(INC_DIR     "${CMAKE_CURRENT_LIST_DIR}/include")
+set(ASSETS_DIR  "${CMAKE_CURRENT_LIST_DIR}/assets")
+
+# ---------- Sources ----------
+file(GLOB_RECURSE PROJECT_SOURCES CONFIGURE_DEPENDS "${SRC_DIR}/*.c")
+
+add_executable(${PROJECT_NAME} ${PROJECT_SOURCES})
+target_include_directories(${PROJECT_NAME} PRIVATE "${SRC_DIR}" "${INC_DIR}")
+target_link_libraries(${PROJECT_NAME} PRIVATE raylib)
+
+# ---------- Warnings / ASan ----------
+if(MSVC)
+  target_compile_options(${PROJECT_NAME} PRIVATE /W4 /permissive-)
+else()
+  target_compile_options(${PROJECT_NAME} PRIVATE -Wall -Wextra -Wshadow -Wconversion -Wno-unused-parameter)
+  if(CMAKE_BUILD_TYPE STREQUAL "Debug")
+    target_compile_options(${PROJECT_NAME} PRIVATE -fsanitize=address -fno-omit-frame-pointer)
+    target_link_options(${PROJECT_NAME} PRIVATE -fsanitize=address)
+  endif()
+endif()
+
+# ---------- Assets: copy next to the exe ----------
+add_custom_command(TARGET ${PROJECT_NAME} POST_BUILD
+  COMMAND ${CMAKE_COMMAND} -E copy_directory
+          "${ASSETS_DIR}" "$<TARGET_FILE_DIR:${PROJECT_NAME}>/assets"
+  COMMENT "Copying assets next to the executable"
+)
+
+# Compile-time asset root: absolute in Debug; relative otherwise
+target_compile_definitions(${PROJECT_NAME} PRIVATE
+  $<$<CONFIG:Debug>:ASSETS_PATH="${ASSETS_DIR}/">
+  $<$<NOT:$<CONFIG:Debug>>:ASSETS_PATH="./assets/">
+)