CMake常用指令

CMake文件符號的意思

Square Brackets [ ]
Angle Brackets < >

https://stackoverflow.com/a/23242584/22299707

建置

cmake -S . -B build
cmake --build build -j 8
``````



# Linux下用pkg_check_modules尋找套件
```cmake
cmake_minimum_required(VERSION 3.15)
project(fy-version)

set(CMAKE_C_STANDARD 11)

find_package (PkgConfig REQUIRED)
pkg_check_modules(FYAML IMPORTED_TARGET libfyaml)
if (FYAML_FOUND)
        include_directories(${FYAML_INCLUDE_DIRS})
        link_directories(${FYAML_LIBRARY_DIRS})
        list(APPEND LINK_LIB_LIST ${FYAML_LIBRARIES})
        
        message(STATUS "found library:${FYAML_LIBRARIES}")
endif ()

# 建立執行檔
add_executable(fy-version yaml_reader.c)

target_link_libraries(${PROJECT_NAME}  PkgConfig::FYAML)

https://cmake.org/cmake/help/latest/module/FindPkgConfig.html

https://stackoverflow.com/questions/42634710/how-to-use-pkg-config-in-cmake-juci

https://blog.csdn.net/zhizhengguan/article/details/111826697

Debug模式編譯

set(CMAKE_BUILD_TYPE Debug)

引用CUDA

Declare CUDA as a LANGUAGE in your project

project(GTC LANGUAGES CUDA CXX)

• 連接library
  利用FindCUDAToolkit(cmake版本>3.17)

  find_package(CUDAToolkit)
  add_executable(
      binary_linking_to_cudart 
      my_cpp_file_using_cudart.cpp
  )
  target_link_libraries(binary_linking_to_cudart PRIVATE CUDA::cudart)

  利用FindCUDAToolkit

https://cliutils.gitlab.io/modern-cmake/chapters/packages/CUDA.html

https://developer.download.nvidia.com/video/gputechconf/gtc/2019/presentation/s9444-build-systems-exploring-modern-cmake-cuda-v2.pdf

cmake 加入編譯好的.o檔

SET(OBJS
  ${CMAKE_CURRENT_SOURCE_DIR}/libs/obj.o
)

ADD_EXECUTABLE(myProgram ${OBJS} <other-sources>)

SET_SOURCE_FILES_PROPERTIES(
  ${OBJS}
  PROPERTIES
  EXTERNAL_OBJECT true
  GENERATED true
)

https://stackoverflow.com/a/38610428

編譯不是cmake的專案或函式庫

ExternalProject_Add(Qt
   DOWNLOAD_DIR ${CMAKE_CURRENT_BINARY_DIR}
   URL ${qt_file}
   UPDATE_COMMAND ""
   SOURCE_DIR ${qt_source}
   BUILD_IN_SOURCE 1
   CONFIGURE_COMMAND ${qt_configure}
   BUILD_COMMAND ${qt_build}
   INSTALL_COMMAND "${qt_install}"
   )

https://stackoverflow.com/a/3493578/22299707

編譯專案外的makefile專案資料夾

以下指令可以在外部資料夾下make指令

include(ExternalProject)
ExternalProject_Add(deepstreamapp  
    SOURCE_DIR ${DEEPSTREAMAPP}/sample_apps/deepstream-app    # This is not likely to be CMAKE_CURRENT_LIST_DIR
    CONFIGURE_COMMAND ""
    INSTALL_COMMAND ""
    DOWNLOAD_COMMAND ""
    BUILD_COMMAND make
    BUILD_IN_SOURCE true
)

接下來可以用以下指令找出所有編譯好的.o檔並且加到專案內

file(GLOB_RECURSE  DEEPSTREAMAPPCONFIGPARSER "/opt/nvidia/deepstream/deepstream/sources/apps/apps-common/src/deepstream-yaml/*.o")

SET(OBJS
    ${DEEPSTREAMAPPCONFIGPARSER}
)   

SET_SOURCE_FILES_PROPERTIES(
  ${OBJS}
  PROPERTIES
  EXTERNAL_OBJECT true
  GENERATED true
)

add_executable(${PROJECT_NAME}
    ${OBJS}
    main.cpp
)

參考:https://discourse.cmake.org/t/external-project-using-makefile/2692/5

增加函式庫

https://cmake.org/cmake/help/latest/guide/tutorial/Adding%20a%20Library.html#step-2-adding-a-library
target_include_directories() 和 target_link_libraries()