在cmake中使用Pcap++库

Question

我目前正在将Qt Creator项目转换为cmake项目，无法再编译我的程序。我使用库PcapPlusPlus作为一个子模块，因为我们对原始库做了一些重大更改。我使用他们的说明中建议的构建链，并在子模块中使用"./configure-linux --default“和"make libs”。因此，*.a文件的路径是正确的。还提到该项目仍然可以使用Qt Creator进行编译(它也具有相同的依赖项)。

这是我的CMakeLists.txt：

cmake_minimum_required(VERSION 3.16)
project(mitm)

set(CMAKE_PREFIX_PATH ~/Qt/5.15.0/gcc_64/lib/cmake/)

#pthread
set(THREADS_PREFER_PTHREAD_FLAG ON)
find_package(Threads REQUIRED)

#pcap
include(FindPCAP.cmake)

find_package(Qt5Core REQUIRED)
find_package(Qt5Widgets REQUIRED)

set(CMAKE_CXX_STANDARD 14)

include_directories(.)
include_directories("${CMAKE_SOURCE_DIR}/../Pcap++/header/")
include_directories("${CMAKE_SOURCE_DIR}/../Packet++/header/")
include_directories("${CMAKE_SOURCE_DIR}/../Common++/header/")

add_executable(mitm "")

set_target_properties(mitm PROPERTIES
        AUTOMOC ON
        AUTOUIC ON
        AUTORCC ON)

set(SOURCE_FILES
        classes/base/wrapper/connection.cpp
        classes/base/wrapper/connection.h
        classes/base/wrapper/connectionlist.cpp
        classes/base/wrapper/connectionlist.h
        classes/base/wrapper/hostlist.cpp
        classes/base/wrapper/hostlist.h
        classes/base/connectionmanager.cpp
        classes/base/connectionmanager.h
        main.cpp
        wmain.cpp
        wmain.h
        wmain.ui
        wsetup.cpp
        wsetup.h
        wsetup.ui)

set(RESOURCE_FILES
        fonts.qrc)

target_sources(mitm PRIVATE
        ${SOURCE_FILES}
        ${RESOURCE_FILES})

target_link_libraries(mitm PRIVATE
        Qt5::Widgets
        "${CMAKE_SOURCE_DIR}/../Common++/Lib/Release/libCommon++.a"
        "${CMAKE_SOURCE_DIR}/../Pcap++/Lib/libPcap++.a"
        "${CMAKE_SOURCE_DIR}/../Packet++/Lib/libPacket++.a"
        Threads::Threads
        ${PCAP_LIBRARY}
        )

​

/usr/bin/ld: ../../Pcap++/Lib/libPcap++.a(PcapLiveDevice.o): in function `pcpp::PcapLiveDevice::startCaptureBlockingMode(bool (*)(pcpp::RawPacket*, pcpp::PcapLiveDevice*, void*), void*, int)':
/home/bemerged/Documents/Git/mitm/Pcap++/src/PcapLiveDevice.cpp:492: undefined reference to `pcpp::clockGetTime(long&, long&)'
/usr/bin/ld: /home/bemerged/Documents/Git/mitm/Pcap++/src/PcapLiveDevice.cpp:512: undefined reference to `pcpp::clockGetTime(long&, long&)'
/usr/bin/ld: ../../Pcap++/Lib/libPcap++.a(PcapLiveDevice.o): in function `pcpp::PcapLiveDevice::getIPv4Address() const':
/home/bemerged/Documents/Git/mitm/Pcap++/src/PcapLiveDevice.cpp:905: undefined reference to `pcpp::sockaddr2in_addr(sockaddr*)'
/usr/bin/ld: /home/bemerged/Documents/Git/mitm/Pcap++/src/PcapLiveDevice.cpp:901: undefined reference to `pcpp::sockaddr2string(sockaddr*, char*)'
/usr/bin/ld: /home/bemerged/Documents/Git/mitm/Pcap++/src/PcapLiveDevice.cpp:905: undefined reference to `pcpp::sockaddr2in_addr(sockaddr*)'
/usr/bin/ld: ../../Pcap++/Lib/libPcap++.a(PcapLiveDevice.o): in function `pcpp::PcapLiveDevice::PcapLiveDevice(pcap_if*, bool, bool, bool)':
/home/bemerged/Documents/Git/mitm/Pcap++/src/PcapLiveDevice.cpp:101: undefined reference to `pcpp::sockaddr2string(sockaddr*, char*)'

​

我是个新手，到目前为止我已经尽力了。我确信这是pcap++库中的链接问题。正如你可能猜到的那样，我现在用谷歌搜索了大约2个小时，没有找到任何可以解决我的问题的东西。

Answer 1

FindPCAP.cmake搜索lib pcap和C库。您正在将C++与Pcap++一起使用，并且应该另外链接到lib pcaplusplus或Pcap++和Packet++。

cmake linking against static libraries - do you have to tell cmake where to look?