cmake_minimum_required(VERSION 3.12)

project(kunlang_remake LANGUAGES C CXX)

set(CMAKE_EXPORT_COMPILE_COMMANDS ON)

# =================================================
# 调试符号配置（关键修改）
# =================================================
set(CMAKE_CXX_FLAGS_DEBUG "-O0 -g -DDEBUG")
set(CMAKE_C_FLAGS_DEBUG   "-O0 -g -DDEBUG")

# Release 也保留符号（方便现场 gdb）
set(CMAKE_CXX_FLAGS_RELEASE "-O2 -g -DNDEBUG")
set(CMAKE_C_FLAGS_RELEASE   "-O2 -g -DNDEBUG")

# =================================================
# 基本配置
# =================================================
set(CMAKE_CXX_STANDARD 20)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
set(CMAKE_CXX_EXTENSIONS OFF)

if(NOT CMAKE_BUILD_TYPE)
    set(CMAKE_BUILD_TYPE Release CACHE STRING "Build type" FORCE)
endif()

# 构建产物输出到项目根目录/bin
set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${PROJECT_SOURCE_DIR}/bin)

# =================================================
# 编译 / 链接选项
# =================================================
# 通用警告
add_compile_options(
    -Wall
    -Wextra
    -ffunction-sections
    -fdata-sections
)

# 根据构建类型追加编译选项
if(CMAKE_BUILD_TYPE STREQUAL "Release")
    add_compile_options(-O2)
elseif(CMAKE_BUILD_TYPE STREQUAL "Debug")
    add_compile_options(-O0)
endif()


set(CMAKE_EXE_LINKER_FLAGS
    "${CMAKE_EXE_LINKER_FLAGS} -static -Wl,--gc-sections"
)

# =================================================
# 源文件
# =================================================
file(GLOB_RECURSE SOURCES_CPP CONFIGURE_DEPENDS src/*.cpp)
file(GLOB_RECURSE SOURCES_C   CONFIGURE_DEPENDS src/*.c)
set(SOURCES ${SOURCES_CPP} ${SOURCES_C})

add_executable(${PROJECT_NAME} ${SOURCES})

# =================================================
# 头文件路径
# =================================================
target_include_directories(${PROJECT_NAME} PRIVATE
    ${CMAKE_SOURCE_DIR}/include
    ${CMAKE_SOURCE_DIR}/include/common
    ${CMAKE_SOURCE_DIR}/include/network
    ${CMAKE_SOURCE_DIR}/include/can
    ${CMAKE_SOURCE_DIR}/include/serial
    ${CMAKE_SOURCE_DIR}/include/protocol
    ${CMAKE_SOURCE_DIR}/include/business
    ${CMAKE_SOURCE_DIR}/include/business/instance
    ${CMAKE_SOURCE_DIR}/include/business/remote_ctrl
    ${CMAKE_SOURCE_DIR}/include/business/tbox
    ${CMAKE_SOURCE_DIR}/include/config

    $ENV{HOME}/aarch64_env
    $ENV{HOME}/aarch64_env/openssl/include
    $ENV{HOME}/aarch64_env/paho/include
)

# =================================================
# 目标级编译选项
# =================================================
target_compile_options(${PROJECT_NAME} PRIVATE
    -static
    -static-libstdc++
    -static-libgcc
)

# =================================================
# 静态库链接
# =================================================
target_link_libraries(${PROJECT_NAME}
    $ENV{HOME}/aarch64_env/toolchain/aarch64-linux-musl/lib/libpthread.a
    $ENV{HOME}/aarch64_env/toolchain/aarch64-linux-musl/lib/libdl.a
    $ENV{HOME}/aarch64_env/toolchain/aarch64-linux-musl/lib/libm.a
    $ENV{HOME}/aarch64_env/toolchain/aarch64-linux-musl/lib/libc.a

    # $ENV{HOME}/aarch64_env/paho/lib/libpaho-mqtt3as.a
    $ENV{HOME}/aarch64_env/paho/lib/libpaho-mqtt3a.a
    $ENV{HOME}/aarch64_env/paho/lib/libpaho-mqttpp3.a

    # $ENV{HOME}/aarch64_env/openssl/lib/libssl.a
    # $ENV{HOME}/aarch64_env/openssl/lib/libcrypto.a
)