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cmake_minimum_required(VERSION 3.20)
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project(compiler LANGUAGES C CXX)
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# 统一 C++ 标准（按实验环境可调整）
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set(CMAKE_CXX_STANDARD 17)
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set(CMAKE_CXX_STANDARD_REQUIRED ON)
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set(CMAKE_CXX_EXTENSIONS OFF)
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# 可执行文件输出目录：统一放到 <build>/bin 下（避免落在 build/src/ 等子目录）
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set(CMAKE_RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/bin")
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foreach(cfg IN ITEMS Debug Release RelWithDebInfo MinSizeRel)
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string(TOUPPER "${cfg}" cfg_upper)
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set("CMAKE_RUNTIME_OUTPUT_DIRECTORY_${cfg_upper}" "${CMAKE_BINARY_DIR}/bin")
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endforeach()
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# ANTLR 生成代码目录约定（不进仓库，生成在构建目录）
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set(ANTLR4_GENERATED_DIR "${CMAKE_BINARY_DIR}/generated/antlr4")
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# 统一的编译/包含目录选项（子模块复用）
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add_library(build_options INTERFACE)
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target_compile_features(build_options INTERFACE cxx_std_17)
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target_include_directories(build_options INTERFACE
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"${PROJECT_SOURCE_DIR}/include"
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"${PROJECT_SOURCE_DIR}/src"
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"${ANTLR4_GENERATED_DIR}"
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)
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option(COMPILER_ENABLE_WARNINGS "Enable common compiler warnings" ON)
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if(COMPILER_ENABLE_WARNINGS)
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if(MSVC)
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target_compile_options(build_options INTERFACE /W4)
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else()
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target_compile_options(build_options INTERFACE -Wall -Wextra -Wpedantic)
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endif()
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endif()
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# 尝试查找系统 ANTLR4 runtime；找不到则提供占位 target，便于先配置工程
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find_package(antlr4-runtime CONFIG QUIET)
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set(ANTLR4_RUNTIME_TARGET "")
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if(TARGET antlr4_shared)
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set(ANTLR4_RUNTIME_TARGET antlr4_shared)
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elseif(TARGET antlr4_static)
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set(ANTLR4_RUNTIME_TARGET antlr4_static)
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elseif(TARGET antlr4-runtime)
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set(ANTLR4_RUNTIME_TARGET antlr4-runtime)
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endif()
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if(ANTLR4_RUNTIME_TARGET STREQUAL "")
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add_library(antlr4_runtime_fallback INTERFACE)
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set(ANTLR4_RUNTIME_TARGET antlr4_runtime_fallback)
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message(STATUS "antlr4-runtime 未找到：将以占位 target 配置工程；需要 ANTLR 功能时请安装/引入 antlr4-runtime。")
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endif()
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add_subdirectory(src)
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