Question

我是C ++编程的新手。我从Qt 5.0.1开始。我需要使用来自https://code.google.com/p/tufao/的WebSockets，但我没有安装MinGW所以我用Google搜索我可以创建Qt库项目，包含这些源文件和构建静态库。所以我做到了：

QT       += network
QT       -= gui
TARGET = tufao
TEMPLATE = lib
CONFIG += staticlib
INCLUDEPATH = src src/priv
SOURCES += \
    src/websocket.cpp \
    src/url.cpp \
    src/simplesessionstore.cpp \
    src/sessionstore.cpp \
    src/querystring.cpp \
    src/httpserverresponse.cpp \
    src/httpserverrequestrouter.cpp \
    src/httpserverrequest.cpp \
    src/httpserver.cpp \
    src/httppluginserver.cpp \
    src/httpfileserver.cpp \
    src/headers.cpp \
    src/abstractmessagesocket.cpp \
    src/abstracthttpserverrequesthandler.cpp \
    src/priv/tcpserverwrapper.cpp \
    src/priv/rfc1123.cpp \
    src/priv/rfc1036.cpp \
    src/priv/reasonphrase.cpp \
    src/priv/http_parser.c \
    src/priv/asctime.cpp

HEADERS += \
    src/websocket.h \
    src/url.h \
    src/tufao_global.h \
    src/simplesessionstore.h \
    src/sessionstore.h \
    src/sessionsettings.h \
    src/session.h \
    src/querystring.h \
    src/ibytearray.h \
    src/httpsserver.h \
    src/httpserverresponse.h \
    src/httpserverrequestrouter.h \
    src/httpserverrequest.h \
    src/httppluginserver.h \
    src/httpfileserver.h \
    src/headers.h \
    src/abstractmessagesocket.h \
    src/abstracthttpserverrequesthandlerfactory.h \
    src/abstracthttpserverrequesthandler.h \
    src/priv/websocket.h \
    src/priv/url.h \
    src/priv/tcpserverwrapper.h \
    src/priv/simplesessionstore.h \
    src/priv/sessionstore.h \
    src/priv/rfc1123.h \
    src/priv/rfc1036.h \
    src/priv/reasonphrase.h \
    src/priv/httpsserver.h \
    src/priv/httpserverresponse.h \
    src/priv/httpserverrequestrouter.h \
    src/priv/httpserverrequest.h \
    src/priv/httpserver.h \
    src/priv/httppluginserver.h \
    src/priv/httpfileserver.h \
    src/priv/http_parser.h \
    src/priv/cryptography.h \
    src/priv/asctime.h
unix:!symbian {
    maemo5 {
        target.path = /opt/usr/lib
    } else {
        target.path = /usr/lib
    }
    INSTALLS += target
}

构建完成后，我得到libtufao.a。所以下一步是测试它。我创建了简单的测试项目，并通过单击添加库添加了此库 - ＆gt;外部 - ＆gt;静态的。打开对话框只能打开.lib个文件，因此我将libtufao.a更改为libtufao.lib：

QT       += core gui network
greaterThan(QT_MAJOR_VERSION, 4): QT += widgets   
TARGET = sockettest
TEMPLATE = app
SOURCES += main.cpp\
        mainwindow.cpp
HEADERS  += mainwindow.h \
FORMS    += mainwindow.ui
win32:CONFIG(release, debug|release): LIBS += -L$$PWD/../../components/tufao-build-Desktop_Qt_5_0_1_MinGW_32bit-Release/release/ -llibtufao
else:win32:CONFIG(debug, debug|release): LIBS += -L$$PWD/../../components/tufao-build-Desktop_Qt_5_0_1_MinGW_32bit-Release/debug/ -llibtufao

INCLUDEPATH += $$PWD/../../components/tufao/src
DEPENDPATH += $$PWD/../../components/tufao/src

win32:CONFIG(release, debug|release): PRE_TARGETDEPS += $$PWD/../../components/tufao-build-Desktop_Qt_5_0_1_MinGW_32bit-Release/release/libtufao.lib
else:win32:CONFIG(debug, debug|release): PRE_TARGETDEPS += $$PWD/../../components/tufao-build-Desktop_Qt_5_0_1_MinGW_32bit-Release/debug/libtufao.lib

但是当我尝试构建这个测试项目时，我遇到编译器错误：

未定义的引用   `小鬼 __ ZN5Tufao9WebSocket13connectToHostERK12QHostAddresstRK10QByteArrayRKNS_7HeadersE”   collect2.exe：-1：

错误：ld返回1退出状态

任何人都可以帮助我吗？

此致

修改通过将所有源添加到我的dest项目并在.pro文件中添加DEFINES += TUFAO_LIBRARY来解决问题。现在一切都很好。

Answer 1

Adding external library into Qt Creator project

链接器找不到WebSocket::connectToHost的实现，因此您需要链接其中包含该函数的库。

在.pro文件中，添加

LIBS += "path/to/lib/libname"

或者如果它已经在您的库路径中，您可以放置

LIBS += -lmylibname

所以我想你，可能是

LIBS += -llibtufao

希望有所帮助。

无法在Qt中添加外部包

1 个答案: