cmake_minimum_required(VERSION 3.10)

get_filename_component(TARGET_NAME ${CMAKE_CURRENT_SOURCE_DIR} NAME)

option(A_BUILD_MAIN_AS_STATIC_LIB "Build as a static library instead of an executable" OFF)

# ─── 创建目标 ────────────────────────────────────────────────────────
if(A_BUILD_MAIN_AS_STATIC_LIB)
    add_library(${TARGET_NAME} STATIC main.c)
    set_target_properties(${TARGET_NAME} PROPERTIES
        ARCHIVE_OUTPUT_DIRECTORY ${PROJECT_SOURCE_DIR}/output
    )
else()
    add_executable(${TARGET_NAME} main.c)
    set_target_properties(${TARGET_NAME} PROPERTIES
        RUNTIME_OUTPUT_DIRECTORY ${PROJECT_SOURCE_DIR}/output
    )
endif()

# ─── 编译宏定义 ─────────────────────────────────────────────────────
target_compile_definitions(${TARGET_NAME} PRIVATE
    $<$<CONFIG:Debug>:DEBUG>
    ${GLOBAL_ENABLED_MACROS}
)

# ─── Include 目录 ────────────────────────────────────────────────────
target_include_directories(${TARGET_NAME}
    PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}
)

# ─── 链接模块 ────────────────────────────────────────────────────────
if(GLOBAL_ENABLED_MODULES)
    message(STATUS "[Main] Linking modules: ${GLOBAL_ENABLED_MODULES}")
    target_link_libraries(${TARGET_NAME} PUBLIC ${GLOBAL_ENABLED_MODULES})
else()
    message(STATUS "[Main] No additional modules linked.")
endif()

# ─── 平台链接依赖 ───────────────────────────────────────────────────
string(TOLOWER "${CMAKE_SYSTEM_NAME}" SYSTEM_NAME_LOWER)
if(CMAKE_CROSSCOMPILING AND NOT SYSTEM_NAME_LOWER MATCHES "linux|windows|darwin|android")
    message(STATUS ">>> 裸机/RTOS 环境 (${CMAKE_SYSTEM_NAME})，屏蔽 pthread")
else()
    find_package(Threads REQUIRED)
    target_link_libraries(${TARGET_NAME}
        PUBLIC  Threads::Threads
        PRIVATE ${CMAKE_DL_LIBS}
    )
    if(CMAKE_SYSTEM_NAME STREQUAL "Linux")
        target_link_libraries(${TARGET_NAME} PRIVATE rt)
    endif()
endif()

# ─── 编译选项 ────────────────────────────────────────────────────────
target_compile_options(${TARGET_NAME} PRIVATE
    -Wall -Werror
    -ffunction-sections -fdata-sections
    $<$<CONFIG:Debug>:-g -O0>
    $<$<CONFIG:Release>:-O2>
)

target_link_options(${TARGET_NAME} PRIVATE
    -Wl,--gc-sections
    $<$<CONFIG:Release>:-s>
)