poco cmake 文件和本地库

Question

首先，我是 Linux 新手，对 C++ 没有太多经验，这就是我需要你帮助的原因。

基本上，我有一个带有最新 RASPBIAN JESSIE 映像的 Raspberry Pi，我必须在其上实现一个 websockets 服务器并集成一些 C++ CAN 库。

对于服务器，我选择使用 POCO C++ Libraries。我设法设置了一个服务器，但现在我必须包含 CAN 和 ArduPi 库（CAN 库不是我刚刚收到的用于修复一些错误并将其集成到服务器实现中的创建）。为了构建和编译服务器，我使用了一个 CMakeList 文件，如下所示：link。

CMakeList.txt 看起来像：

#Ref http://stackoverflow.com/questions/30114662/clion-cmake-and-poco
cmake_minimum_required(VERSION 3.3)
project(PoCoWebSocketTest)
# define the project
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11 -lrt -lpthread")
set(SOURCE_FILES main.cpp)
add_executable(PoCoWebSocketTest ${SOURCE_FILES})
# set the POCO paths and libs
set(POCO_PREFIX "/usr/local") # the directory containing "include" and "lib"
set(POCO_INCLUDE_DIR"${POCO_PREFIX}/include")
set(POCO_LIB_DIR "${POCO_PREFIX}/lib")
set(POCO_LIBS
        "${POCO_LIB_DIR}/libPocoNet.so"
        "${POCO_LIB_DIR}/libPocoUtil.so"
        "${POCO_LIB_DIR}/libPocoFoundation.so")
# set the include path for the app
target_include_directories(PoCoWebSocketTest PRIVATE $(POCO_INCLUDE_DIR))
# link the app against POCO
target_link_libraries(PoCoWebSocketTest "${POCO_LIBS}")

以及执行make命令后的输出：

    pi@raspberrypi:~/pocotests/build $ sudo make
[ 50%] Building CXX object CMakeFiles/PoCoWebSocketTest.dir/main.cpp.o
[100%] Linking CXX executable PoCoWebSocketTest
CMakeFiles/PoCoWebSocketTest.dir/main.cpp.o: In function `__static_initialization_and_destruction_0(int, int)':
main.cpp:(.text+0x154): undefined reference to `CAN::CAN()'
collect2: error: ld returned 1 exit status
CMakeFiles/PoCoWebSocketTest.dir/build.make:97: recipe for target 'PoCoWebSocketTest' failed
make[2]: *** [PoCoWebSocketTest] Error 1
CMakeFiles/Makefile2:67: recipe for target 'CMakeFiles/PoCoWebSocketTest.dir/all' failed
make[1]: *** [CMakeFiles/PoCoWebSocketTest.dir/all] Error 2
Makefile:83: recipe for target 'all' failed
make: *** [all] Error 2

主文件的include部分是：

#include "Poco/Net/HTTPServer.h"
#include "Poco/Net/HTTPRequestHandler.h"
#include "Poco/Net/HTTPRequestHandlerFactory.h"
#include "Poco/Net/HTTPServerParams.h"
#include "Poco/Net/HTTPServerRequest.h"
#include "Poco/Net/HTTPServerResponse.h"
#include "Poco/Net/HTTPServerParams.h"
#include "Poco/Net/ServerSocket.h"
#include "Poco/Net/WebSocket.h"
#include "Poco/Net/NetException.h"
#include "Poco/Util/ServerApplication.h"
#include "Poco/Util/Option.h"
#include "Poco/Util/OptionSet.h"
#include "Poco/Util/HelpFormatter.h"
#include "Poco/Format.h"
#include <iostream>
#include "arduPi.h"
#include "CAN.h"

using Poco::Net::ServerSocket;
using Poco::Net::WebSocket;
using Poco::Net::WebSocketException;
using Poco::Net::HTTPRequestHandler;
using Poco::Net::HTTPRequestHandlerFactory;
using Poco::Net::HTTPServer;
using Poco::Net::HTTPServerRequest;
using Poco::Net::HTTPResponse;
using Poco::Net::HTTPServerResponse;
using Poco::Net::HTTPServerParams;
using Poco::Timestamp;
using Poco::ThreadPool;
using Poco::Util::ServerApplication;
using Poco::Util::Application;
using Poco::Util::Option;
using Poco::Util::OptionSet;
using Poco::Util::HelpFormatter;

根据我的阅读，链接可能存在一些问题，但我不确定。我应该在 cmakefile 中添加 CAN 和 ArduPi 库吗？

如果您需要有关代码的更多信息，请告诉我。

最好的问候，

Answer 1

问题解决了，我通过添加 CAN 和 arduPi 库修改了 make 文件并将它们链接到主文件。

这是文件的样子：

#Ref http://stackoverflow.com/questions/30114662/clion-cmake-and-poco
cmake_minimum_required(VERSION 3.3)
project(WebSocketServerCPP)
# define the project
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11 -lrt -lpthread")
set(SOURCE_FILES main.cpp)
add_executable(WebSocketServerCPP ${SOURCE_FILES})
# set the POCO paths and libs
set(POCO_PREFIX "/usr/local") # the directory containing "include" and "lib"
set(POCO_INCLUDE_DIR"${POCO_PREFIX}/include")
set(POCO_LIB_DIR "${POCO_PREFIX}/lib")
set(POCO_LIBS
        "${POCO_LIB_DIR}/libPocoNet.so"
        "${POCO_LIB_DIR}/libPocoUtil.so"
        "${POCO_LIB_DIR}/libPocoFoundation.so")
add_library(libcan STATIC CAN.cpp)
add_library(libardupi STATIC arduPi.cpp)
# set the include path for the app
target_include_directories(WebSocketServerCPP PRIVATE $(POCO_INCLUDE_DIR))
# link the app against POCO
target_link_libraries(libcan libardupi)
target_link_libraries(WebSocketServerCPP libcan)
target_link_libraries(WebSocketServerCPP libardupi)
target_link_libraries(WebSocketServerCPP "${POCO_LIBS}")

谢谢 Tsyvarev。

最好的问候， 马太