基础
CMakeLists.txt
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cmake_minimum_required(VERSION 3.10) # set the project name project(Tutorial) # add the executable add_executable(Tutorial tutorial.cpp) |
加入版本号和头文件
CMakeLists.txt
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cmake_minimum_required(VERSION 3.10) # set the project name project(Tutorial VERSION 1.0) configure_file(TutorialConfig.h.in TutorialConfig.h) # add the executable add_executable(Tutorial tutorial.cpp) target_include_directories(Tutorial PUBLIC "${PROJECT_BINARY_DIR}" ) |
TutorialConfig.h.in
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// the configured options and settings for Tutorial #define Tutorial_VERSION_MAJOR @Tutorial_VERSION_MAJOR@ #define Tutorial_VERSION_MINOR @Tutorial_VERSION_MINOR@ |
TutorialConfig.h
- 这个文件里面的内容会动作生成
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// the configured options and settings for Tutorial #define Tutorial_VERSION_MAJOR 2 #define Tutorial_VERSION_MINOR 0 |
tutorial.cpp
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#include "TutorialConfig.h" #include <iostream> int main(int argc, char* argv[]) { if (argc < 2) { // report version std::cout << argv[0] << " Version " << Tutorial_VERSION_MAJOR << "." << Tutorial_VERSION_MINOR << std::endl; std::cout << "Usage: " << argv[0] << " number" << std::endl; return 1; } system("pause"); return 0; } |
指定C++标准
CMAKE_CXX_STANDARD要写在add_executable上方
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cmake_minimum_required(VERSION 3.10) # set the project name project(Tutorial VERSION 1.0) # specify the C++ standard set(CMAKE_CXX_STANDARD 11) set(CMAKE_CXX_STANDARD_REQUIRED True) configure_file(TutorialConfig.h.in TutorialConfig.h) # add the executable add_executable(Tutorial tutorial.cpp) target_include_directories(Tutorial PUBLIC "${PROJECT_BINARY_DIR}" ) |
添加一个库
主工程CMakeLists.txt
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cmake_minimum_required(VERSION 3.10) # set the project name project(Tutorial VERSION 1.0) # specify the C++ standard set(CMAKE_CXX_STANDARD 11) set(CMAKE_CXX_STANDARD_REQUIRED True) configure_file(TutorialConfig.h.in TutorialConfig.h) # add the MathFunctions library add_subdirectory(MathFunctions) # add the executable add_executable(Tutorial tutorial.cpp) target_include_directories(Tutorial PUBLIC "${PROJECT_BINARY_DIR}" "${PROJECT_SOURCE_DIR}/MathFunctions" ) |
子目录CMakeLists.txt
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add_library(MathFunctions mysqrt.cxx) |
配置该库可选
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cmake_minimum_required(VERSION 3.10) # set the project name project(Tutorial VERSION 1.0) # specify the C++ standard set(CMAKE_CXX_STANDARD 11) set(CMAKE_CXX_STANDARD_REQUIRED True) option(USE_MYMATH "Use tutorial provided math implementation" ON) configure_file(TutorialConfig.h.in TutorialConfig.h) if(USE_MYMATH) add_subdirectory(MathFunctions) list(APPEND EXTRA_LIBS MathFunctions) list(APPEND EXTRA_INCLUDES "${PROJECT_SOURCE_DIR}/MathFunctions") endif() # add the executable add_executable(Tutorial tutorial.cpp) target_link_libraries(Tutorial PUBLIC ${EXTRA_LIBS}) target_include_directories(Tutorial PUBLIC "${PROJECT_BINARY_DIR}" ${EXTRA_INCLUDES} ) |
源文件
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#ifdef USE_MYMATH #include "MathFunctions.h" #endif // 使用 #ifdef USE_MYMATH auto value = mysqrt(param); #else auto value = sqrt(param); #endif |
TutorialConfig.h.in
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// the configured options and settings for Tutorial #define Tutorial_VERSION_MAJOR @Tutorial_VERSION_MAJOR@ #define Tutorial_VERSION_MINOR @Tutorial_VERSION_MINOR@ #cmakedefine USE_MYMATH |
命令行关闭使用该库
- 在顶层CMakeLists.txt同级目录下执行下述命令
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cmake . -DUSE_MYMATH=OFF |
- 然后重新生成
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cmake --build . |
- 就可以看到效果了
- 经过这样一个操作后，本质上是在TutorialConfig.h里面把
#define USE_MYMATH注释掉了
添加一个库（优化）
子目录CMakeLists.txt
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add_library(MathFunctions mysqrt.cxx) target_include_directories(MathFunctions INTERFACE ${CMAKE_CURRENT_SOURCE_DIR} ) |
主工程CMakeLists.txt
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cmake_minimum_required(VERSION 3.10) # set the project name project(Tutorial VERSION 1.0) # specify the C++ standard set(CMAKE_CXX_STANDARD 11) set(CMAKE_CXX_STANDARD_REQUIRED True) option(USE_MYMATH "Use tutorial provided math implementation" ON) configure_file(TutorialConfig.h.in TutorialConfig.h) if(USE_MYMATH) add_subdirectory(MathFunctions) list(APPEND EXTRA_LIBS MathFunctions) endif() # add the executable add_executable(Tutorial tutorial.cpp) target_link_libraries(Tutorial PUBLIC ${EXTRA_LIBS}) target_include_directories(Tutorial PUBLIC "${PROJECT_BINARY_DIR}" ) |
安装
子目录CMakeLists.txt
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add_library(MathFunctions mysqrt.cxx) target_include_directories(MathFunctions INTERFACE ${CMAKE_CURRENT_SOURCE_DIR} ) install(TARGETS MathFunctions DESTINATION lib) install(FILES MathFunctions.h DESTINATION include) |
主工程CMakeLists.txt
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cmake_minimum_required(VERSION 3.10) # set the project name project(Tutorial VERSION 1.0) # specify the C++ standard set(CMAKE_CXX_STANDARD 11) set(CMAKE_CXX_STANDARD_REQUIRED True) option(USE_MYMATH "Use tutorial provided math implementation" ON) configure_file(TutorialConfig.h.in TutorialConfig.h) if(USE_MYMATH) add_subdirectory(MathFunctions) list(APPEND EXTRA_LIBS MathFunctions) endif() # add the executable add_executable(Tutorial tutorial.cpp) target_link_libraries(Tutorial PUBLIC ${EXTRA_LIBS}) target_include_directories(Tutorial PUBLIC "${PROJECT_BINARY_DIR}" ) install(TARGETS Tutorial DESTINATION bin) install(FILES "${PROJECT_BINARY_DIR}/TutorialConfig.h" DESTINATION include ) |
指令
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cmake --install . |
工程的生成
.为CMakeLists.txt所在的目录
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cmake . -G "Visual Studio 16 2019" |
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