cmake_minimum_required(VERSION 3.19)

# cmake_policy(SET CMP0135 OLD)

set(CMAKE_DISABLE_IN_SOURCE_BUILD ON)
set(CMAKE_EXPORT_COMPILE_COMMANDS ON)

project(sysy
  VERSION 0.0.0.1
  DESCRIPTION "The SysY language compiler"
  LANGUAGES CXX
)

set(CMAKE_CXX_STANDARD 17 CACHE STRING "C++ standard to conform to")
set(CMAKE_CXX_STANDARD_REQUIRED YES)
set(CMAKE_CXX_EXTENSIONS OFF)

# ========== 修改点 1：强制 Debug 模式（调试时使用） ==========
if(NOT CMAKE_BUILD_TYPE)
  message(STATUS "Build type not set, defaulting to Debug mode for GDB support.")
  set(CMAKE_BUILD_TYPE "Debug" CACHE STRING
      "Choose the type of build, options are: Debug Release RelWithDebInfo." FORCE)
endif()

# ========== 修改点 2：确保 Debug 模式生成调试信息 ==========
if(CMAKE_BUILD_TYPE STREQUAL "Debug")
  message(STATUS "Debug mode enabled: Adding -g flag for GDB debugging.")
  add_compile_options(-g -O0)  # -O0 禁用优化，避免干扰调试
endif()

# Set output directories
set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${PROJECT_BINARY_DIR}/lib)
set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${PROJECT_BINARY_DIR}/lib)
set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${PROJECT_BINARY_DIR}/bin)

# ANTLR
set(ANTLR_EXECUTABLE "${PROJECT_SOURCE_DIR}/antlr/antlr-4.13.2-complete.jar")
set(ANTLR_RUNTIME "${PROJECT_SOURCE_DIR}/antlr/antlr4-runtime-4.13.2")

set(ANTLR4_INSTALL ON)
set(WITH_DEMO OFF)
set(ANTLR_BUILD_CPP_TESTS OFF)
add_subdirectory(${ANTLR_RUNTIME})

# Project source files
add_subdirectory(src)