C++ Armadillo库给出了对`arma::arma_rng_cxx11_instance‘的未定义引用

Question

我使用CMake构建我的项目，使用Catch2进行测试。以下是我的项目结构

├── build
├── CMakeLists.txt
├── compile_commands.json
├── include
│   ├── node.h
│   ├── rrt.h
│   └── tree.h
├── Makefile
├── package.xml
├── scripts
├── src
│   ├── main.cpp
│   ├── node.cpp
│   ├── rrt.cpp
│   └── tree.cpp
├── test
│   ├── CMakeLists.txt
│   └── test.cpp
└── third_party
    └── catch.hpp

在./CMakeLists.txt中

cmake_minimum_required(VERSION 2.8.3)
project(rrt_ros)

set(CMAKE_CXX_STANDARD 11)
set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
set(SOURCES 
    ${CMAKE_CURRENT_SOURCE_DIR}/include/rrt.h
    ${CMAKE_CURRENT_SOURCE_DIR}/include/tree.h
    ${CMAKE_CURRENT_SOURCE_DIR}/include/node.h
    ${CMAKE_CURRENT_SOURCE_DIR}/src/rrt.cpp
    ${CMAKE_CURRENT_SOURCE_DIR}/src/tree.cpp
    ${CMAKE_CURRENT_SOURCE_DIR}/src/node.cpp
    ${CMAKE_CURRENT_SOURCE_DIR}/src/main.cpp
    )

find_package(catkin REQUIRED COMPONENTS roscpp std_msgs)
find_package(Armadillo REQUIRED)
FIND_PACKAGE(Eigen3 REQUIRED)

add_executable(
    rrt
    ${SOURCES}
    )

target_include_directories(
    rrt
    PUBLIC
    ${catkin_INCLUDE_DIRS}
    ${EIGEN3_INCLUDE_DIR}
    ${ARMADILLO_INCLUDE_DIR}
    ${CMAKE_CURRENT_SOURCE_DIR}/include
)


target_link_libraries(rrt ${catkin_LIBRARIES} ${ARMADILLO_LIBRARIES})
add_subdirectory(test)

在test/CMakeLists.txt，我有

project(rrt_ros)
set(CMAKE_CXX_STANDARD 11)
set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
find_package(catkin REQUIRED COMPONENTS roscpp std_msgs)
find_package(Armadillo REQUIRED)
FIND_PACKAGE(Eigen3 REQUIRED)
message("TESTING......" ${CMAKE_CURRENT_SOURCE_DIR}/../include/rrt.h)

add_executable(rrt_test test.cpp
    ${CMAKE_CURRENT_SOURCE_DIR}/../include/rrt.h
    ${CMAKE_CURRENT_SOURCE_DIR}/../include/tree.h
    ${CMAKE_CURRENT_SOURCE_DIR}/../include/node.h
    ${CMAKE_CURRENT_SOURCE_DIR}/../src/rrt.cpp
    ${CMAKE_CURRENT_SOURCE_DIR}/../src/tree.cpp
    ${CMAKE_CURRENT_SOURCE_DIR}/../src/node.cpp
    )

target_include_directories(
    rrt_test
    PUBLIC
    ${catkin_INCLUDE_DIRS}
    ${Armadillo_INCLUDE_DIR}
    ${CMAKE_CURRENT_SOURCE_DIR}/../third_party
    ${CMAKE_CURRENT_SOURCE_DIR}/../include
    )

target_link_libraries(
    rrt_test
    ${catkin_LIBRARIES}
    ${Aramdillo_LIBRARIES}
    )

在rrt.cpp中，我有一个函数，调用armadillo的采样函数

arma::randi<arma::mat>(1, 2, arma::distr_params(1, 10))

当我编译项目时，它会给出一个未定义的错误：

rrt.cpp:(.text._ZTWN4arma23arma_rng_cxx11_instanceE[_ZTWN4arma23arma_rng_cxx11_instanceE]+0x15):  undefined reference to 'arma::arma_rng_cxx11_instance'  
collect2: error: ld returned 1 exit status

但是，当我在./test/CMakeLists.txt中注释掉./test/CMakeLists.txt时，它编译得很好。

Answer 1

我最近也遇到了同样的问题。在您的test/CmakeLists.txt中，应该使用${ARMADILLO_LIBRARIES}而不是${Aramdillo_LIBRARIES} (拼写错误和大写问题)。