Created by: helinwang

From the new cmake API, when user links a test, he calls: cc_test: https://github.com/PaddlePaddle/Paddle/blob/develop/cmake/generic.cmake#L81

function(cc_test TARGET_NAME)
  set(options "")
  set(oneValueArgs "")
  set(multiValueArgs SRCS DEPS)
  cmake_parse_arguments(cc_test "${options}" "${oneValueArgs}" "${multiValueArgs}" ${ARGN})
  add_executable(${TARGET_NAME} ${cc_test_SRCS})
  link_paddle_test(${TARGET_NAME})
  if(cc_test_DEPS)
    target_link_libraries(${TARGET_NAME} ${cc_test_DEPS})
    add_dependencies(${TARGET_NAME} ${cc_test_DEPS})
  endif()
  add_test(${TARGET_NAME} ${TARGET_NAME})
endfunction(cc_test)

util.cmake:

function(link_paddle_test TARGET_NAME)
    link_paddle_exe(${TARGET_NAME})
    target_link_libraries(${TARGET_NAME}
                          paddle_test_main
                          paddle_test_util
                          ${GTEST_LIBRARIES})
endfunction()

function(link_paddle_exe TARGET_NAME)
    if(WITH_RDMA)
        generate_rdma_links()
    endif()

    target_circle_link_libraries(${TARGET_NAME}
        ARCHIVE_START
        paddle_gserver
        paddle_function
        ARCHIVE_END
        paddle_pserver
        paddle_trainer_lib
        paddle_network
        paddle_math
        paddle_utils
        paddle_parameter
        paddle_proto
        paddle_cuda
        ${EXTERNAL_LIBS}
        ${CMAKE_THREAD_LIBS_INIT}
        ${CMAKE_DL_LIBS}
        ${RDMA_LD_FLAGS}
        ${RDMA_LIBS})

    if(ANDROID)
        target_link_libraries(${TARGET_NAME} log)
    endif(ANDROID)

    add_dependencies(${TARGET_NAME} ${external_project_dependencies})
endfunction()

Following the function link_paddle_test we can see that to link any test, we will link every static library that Paddle depends on. It makes every Paddle's dependency libraries depends on paddle's cmake. I think this is not very good, for example, we want our new tensor library not depend on anything Paddle related.