创建封装其他 2 个项目的可执行文件

Creating an executable encapsulating 2 other projects

我正在使用 Eclipse C++ 开发 Windows。我的项目中有这个结构:

subProject A
   -> creates a static library (works fine)
subProject B encapsulating subproject A
   -> creates a static library (works fine)
subProject TestA
   -> creates an executable (works fine)
subProject TestB
    |dev
      |src
      | CmakeList.txt
    |CmakeList.txt
   -> creates an executable (doesn't work)

这是 TestB 可执行文件的开发目录中的CmakeList.txt

set(${PROJECT_NAME}_INCLUDE_DIRS
    $(CMAKE_CURRENT_SOURCE_DIR}/src
    CACHE STRING "" FORCE)

include_directories(${${PROJECT_NAME}_INCLUDE_DIRS})

file(GLOB_RECURSE ${PROJECT_NAME}_HEADER_FILES FOLLOW_SYMLINKS
  ./*.hpp
  ./*.h)

file(GLOB_RECURSE ${PROJECT_NAME}_SORUCE_FILES FOLLOW_SYMLINKS
  ./*.cpp
  ./*.c)

set(${PROJECT_NAME}_FILES ${${PROJECT_NAME}_HEADER_FILES}
    ${${PROJECT_NAME}_SOURCE_FILES})

# Additional includes and link directories and dependencies
include_directories(${CMAKE_CURRENT_SOURCE_DIR}/../../install/${CMAKE_BUILD_TYPE}/A/include)
include_directories(${CMAKE_CURRENT_SOURCE_DIR}/../../install/${CMAKE_BUILD_TYPE}/B/include)

if(${CMAKE_BUILD_TYPE} STREQUAL "Release")
set(${PROJECT_NAME}_EXTRA_LIBRARIES ${${PROJECT_NAME}_EXTRA_LIBRARIES}
                     A
                     B
                     pthread)
elseif(${CMAKE_BUILD_TYPE} STREQUAL "Debug")
set(${PROJECT_NAME}_EXTRA_LIBRARIES ${${PROJECT_NAME}_EXTRA_LIBRARIES}
                     A
                     B
                     pthread)
endif()

# Add a library to the project
link_directories(${CMAKE_CURRENT_SOURCE_DIR}/../../install/${CMAKE_BUILD_TYPE}/A/lib)
link_directories(${CMAKE_CURRENT_SOURCE_DIR}/../../install/${CMAKE_BUILD_TYPE}/B/lib)

add_executable(${PROJECT_NAME} ${${PROJECT_NAME}_FILES})

target_link_libraries(${PROJECT_NAME} ${${PROJECT_NAME}_EXTRA_LIBRARIES})

install(FILES ${${PROJECT_NAME}_HEADER_FILES}
     DESTINATION ${CMAKE_INSTALL_PREFIX}/include/
     PERSMISSIONS OWNER_READ GROUP_READ WORLD_READ)

install(TARGETS ${PROJECT_NAME}
     ARCHIVE DESTINATION lib
     LIBRARY DESTINATION lib
     RUNTIME DESTINATION bin)

在我的 B 子项目中,在一个文件中,我有这个:

#include "A.hpp"

...
A algo;
A.method(parameters)

当我构建我的 TestB 时,我在 B 项目 上面的两行中出现了这个奇怪的错误,这导致我的构建失败:

undefined reference to A::A()
undefined reference to A::method(parameter)

当我评论这些行并重建 B 项目TestB 项目 时它工作正常,我在 B 中有一个库项目和 TestB 中的 .exe。

我不明白我的问题在哪里。

B依赖于A,所以将B的CMakeLists.txt中的依赖添加到A和target_link_libraries中。即使它是一个静态库,并且当你构建 B 时不会有任何实际的 linking,这无论如何都会给 CMake 一个提示,即每次你 link B 到可执行文件,您还必须 link 之后 AA 必须在 link 命令行中的 B 之后,以便在到达 link 到 [=13] 时知道 B 所需的符号=].有关详细信息,请参阅 here

如果您正在寻找快速修复,只需更改:

set(${PROJECT_NAME}_EXTRA_LIBRARIES ${${PROJECT_NAME}_EXTRA_LIBRARIES}
                     A
                     B
                     pthread)

至此

set(${PROJECT_NAME}_EXTRA_LIBRARIES ${${PROJECT_NAME}_EXTRA_LIBRARIES}
                     B
                     A
                     pthread)