project-root/
│── CMakeLists.txt
│── vcpkg.json              # vcpkg 套件描述
│── libs/
│   └── image_processing/
│       ├── include/
│       │   └── image_processing.hpp
│       ├── src/
│       │   └── image_processing.cpp
│       └── CMakeLists.txt
│── apps/
│   ├── cli_tool_A/
│   │   └── CMakeLists.txt
│   └── cli_tool_B/
│       └── CMakeLists.txt

cmake_minimum_required(VERSION 3.15)
project(image_processing LANGUAGES CXX)
add_library(image_processing src/image_processing.cpp)
target_include_directories(image_processing PUBLIC include)
target_compile_features(image_processing PUBLIC cxx_std_17)

cmake_minimum_required(VERSION 3.15)
project(ModularCpp LANGUAGES CXX)
# 引入子模組
add_subdirectory(libs/image_processing)
add_subdirectory(apps/cli_tool_A)
add_subdirectory(apps/cli_tool_B)

cmake_minimum_required(VERSION 3.15)
project(cli_tool_A LANGUAGES CXX)
add_executable(cli_tool_A main.cpp)
target_link_libraries(cli_tool_A PRIVATE image_processing)

{
  "name": "modular-cpp",
  "version-string": "1.0.0",
  "dependencies": [
    "opencv4",
    "fmt"
  ]
}