创建一个可执行封装2个其他项目

Question

我正在使用Eclipse C++中的Windows。我有这样的结构在我的项目：

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CmakeList.txt在为TESTB可执行dev目录：

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) 

在我的乙子项目，在文件中，我有这样的：

#include "A.hpp" 

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

当我建立我的TESTB，我对2号线出现在B类项目 AB这个奇怪的错误奥雅纳这使得我的生成失败：

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

当我发表意见，这些线路和重建B类项目和TESTB项目它工作得很好，我在B项目库，并在一个.exe文件TESTB。

我不明白我的问题在哪里。

Answer 1

B依赖于A，所以将B的CMakeLists.txt中的依赖关系添加到A中，其中target_link_libraries。即使它是一个静态库，并且在生成B时也不会有任何实际链接，但无论如何，这将提示CMake每次将B链接到可执行文件时，还必须链接之后到A。 A必须位于链接命令行中的B之后，以便在链接到A时知道B所需的符号。有关更多详细信息，请参阅here。

如果你正在寻找一个快速解决，而不是，只是改变：

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

这个

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