cmake_minimum_required(VERSION 3.10)

get_filename_component(TARGET_NAME "${CMAKE_CURRENT_SOURCE_DIR}" NAME)
set(COMMON_CMAKE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/../CMakeLists.txt")

if(EXISTS ${COMMON_CMAKE_PATH})
    include(${COMMON_CMAKE_PATH})
else()
    message(FATAL_ERROR "Cannot find common build logic at ${COMMON_CMAKE_PATH}")
endif()

# 每次构建重新生成 build_time.h（custom target 永远过期），
# 保证 common.c 因头文件内容/时间变化而重新编译，Rd_GetBuildTime() 拿到最新时间。
set(BUILD_TIME_HEADER "${CMAKE_CURRENT_BINARY_DIR}/build_time.h")

add_custom_target(GenBuildTime
    COMMAND ${CMAKE_COMMAND}
        "-DOUTPUT=${BUILD_TIME_HEADER}"
        -P "${CMAKE_CURRENT_SOURCE_DIR}/cmake/gen_build_time.cmake"
    BYPRODUCTS "${BUILD_TIME_HEADER}"
    COMMENT "[${TARGET_NAME}] Generating build_time.h"
    VERBATIM
)

add_dependencies(${TARGET_NAME} GenBuildTime)
target_include_directories(${TARGET_NAME} PRIVATE "${CMAKE_CURRENT_BINARY_DIR}")