c++ - 在CMake中将标题包含在库中

我的项目中有两个实用程序库。我正在寻找为库编写CMake配置的最佳方法。

/my_project
 --> CMakeLists.txt
 --> main.cpp
 --> /utils
      --> CMakeLists.txt
      --> common.h
      --> /base_c
           --> CMakeLists.txt
           --> base_c.c
           --> base_c.h
      --> /base_cpp
           --> CMakeLists.txt
           --> base_cpp.cpp
           --> base_cpp.hpp

我当前的CMake文件:

/my_project/CMakeLists.txt

cmake_minimum_requared(VERSION 3.8)
project(my_project)

add_subdirectory(utils)

add_executable(main main.c)
target_link_libraries(main utils base_c base_cpp)

/my_project/utils/CMakeLists.txt

add_subdirectory(base_c)
add_subdirectory(base_cpp)

add_library(utils)
target_sources(utils PUBLIC common.h)

/my_project/utils/base_c/CMakeLists.txt

add_library(base_c base_c.c)
target_sources(base_c PUBLIC base_c.h)

/my_project/utils/base_cpp/CMakeLists.txt

add_library(base_cpp base_cpp.cpp)
target_sources(base_cpp PUBLIC base_cpp.hpp)

find_library(BASEC base_c ../base_c)
target_link_libraries(base_cpp BASEC)

问题在于base_cpp找不到base_c中的包含内容。我应该如何修复配置？

我设法使它与target_include_directories(base_cpp PRIVATE ../base_c)一起使用，但这很丑陋，根据INTERFACE_INCLUDE_DIRECTORIES documentation，它不是必需的。

最佳答案

正如@Anedar提到的，要解决这种情况，需要在target_include_directories库中使用带有PUBLIC或INTERFACE选项的CMakeLists.txt。这将填充库目标的INTERFACE_INCLUDE_DIRECTORIES，供消费方的target_link_libraries使用。

我的工作配置:

/my_project/CMakeLists.txt

cmake_minimum_requared(VERSION 3.8)
project(my_project)

add_subdirectory(utils)

add_executable(main main.c)
target_link_libraries(main utils base_c base_cpp)

/my_project/utils/CMakeLists.txt

add_subdirectory(base_c)
add_subdirectory(base_cpp)

add_library(utils)
target_sources(utils PUBLIC common.h)
target_include_directories(utils INTERFACE ${CMAKE_CURRENT_SOURCE_DIR})

/my_project/utils/base_c/CMakeLists.txt

add_library(base_c base_c.c)
target_sources(base_c PUBLIC base_c.h)
target_include_directories(base_c INTERFACE ${CMAKE_CURRENT_SOURCE_DIR})

/my_project/utils/base_cpp/CMakeLists.txt

add_library(base_cpp base_cpp.cpp)
target_sources(base_cpp PUBLIC base_cpp.hpp)
target_include_directories(base_cpp INTERFACE ${CMAKE_CURRENT_SOURCE_DIR})

target_link_libraries(base_cpp base_c)

关于c++ - 在CMake中将标题包含在库中，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/46296487/