项目结构
.
├── CMakeLists.txt
├── external //We simulate that code is provided by an "external" library outside of src
│ ├── CMakeLists.txt
│ ├── conversion.cpp
│ ├── conversion.hpp
│ └── README.md
├── src
│ ├── CMakeLists.txt
│ ├── evolution //propagates the system in a time step
│ │ ├── CMakeLists.txt
│ │ ├── evolution.cpp
│ │ └── evolution.hpp
│ ├── initial //produces the initial state
│ │ ├── CMakeLists.txt
│ │ ├── initial.cpp
│ │ └── initial.hpp
│ ├── io //contains a function to print a row
│ │ ├── CMakeLists.txt
│ │ ├── io.cpp
│ │ └── io.hpp
│ ├── main.cpp //the main function
│ └── parser //parses the command-line input
│ ├── CMakeLists.txt
│ ├── parser.cpp
│ └── parser.hpp
└── tests //contains two unit tests using the Catch2 library
├── catch.hpp
├── CMakeLists.txt
└── test.cpp
如何操作
1. 最高级别的CMakeLists.txt与“食谱1:使用函数和宏进行代码重用”非常相似。
cmake_minimum_required(VERSION 3.5 FATAL_ERROR)
project(recipe-07 LANGUAGES CXX)
set(CMAKE_CXX_STANDARD 11)
set(CMAKE_CXX_EXTENSIONS OFF)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
include(GNUInstallDirs)
set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY
${CMAKE_BINARY_DIR}/${CMAKE_INSTALL_LIBDIR})
set(CMAKE_LIBRARY_OUTPUT_DIRECTORY
${CMAKE_BINARY_DIR}/${CMAKE_INSTALL_LIBDIR})
set(CMAKE_RUNTIME_OUTPUT_DIRECTORY
${CMAKE_BINARY_DIR}/${CMAKE_INSTALL_BINDIR})
add_subdirectory(src)
add_subdirectory(external)
enable_testing()
add_subdirectory(tests)
2.目标和源代码在src/CMakeLists.txt中被定义(除了转换目标)
add_executable(automata main.cpp)
add_subdirectory(evolution)
add_subdirectory(initial)
add_subdirectory(io)
add_subdirectory(parser)
target_link_libraries(automata
PRIVATE
conversion
evolution
initial
io
parser
)
3. 转换库在 external/CMakeLists.txt 中定义。
add_library(conversion "")
target_sources(conversion
PRIVATE
${CMAKE_CURRENT_LIST_DIR}/conversion.cpp
PUBLIC
${CMAKE_CURRENT_LIST_DIR}/conversion.hpp
)
target_include_directories(conversion
PUBLIC
${CMAKE_CURRENT_LIST_DIR}
)
4. src/CMakeLists.txt 文件添加了更多的子目录,这些子目录又包含了 CMakeLists.txt 文件。它们的结构都很相似;src/evolution/CMakeLists.txt 包含以下信息:
add_library(evolution "")
target_sources(evolution
PRIVATE
${CMAKE_CURRENT_LIST_DIR}/evolution.cpp
PUBLIC
${CMAKE_CURRENT_LIST_DIR}/evolution.hpp
)
target_include_directories(evolution
PUBLIC
${CMAKE_CURRENT_LIST_DIR}
)
5. 单元测试已在 tests/CMakeLists.txt 中注册。
add_executable(cpp_test test.cpp)
target_link_libraries(cpp_test evolution)
add_test(
NAME
test_evolution
COMMAND
$<TARGET_FILE:cpp_test>
)
如何运行
$ mkdir -p build
$ cd build
$ cmake ..
$ cmake --build .
参考:https://github.com/sun1211/cmake_with_add_subdirectory