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POCan't add external package in Qt
 

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    <p>I'm newbie in C++ programming. I started from Qt 5.0.1. I need to use WebSockets from: <a href="https://code.google.com/p/tufao/" rel="nofollow">https://code.google.com/p/tufao/</a> but I don't have MinGW installation so I googled that I can create Qt library project, include these source files and build static library. So I did it:</p> <pre><code>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 } </code></pre> <p>After build, I get <code>libtufao.a</code>. So next step is to test it. I created simple test project and added this library by clicking Add library -> external -> static. Open dialog can open only <code>.lib</code> files so I changed <code>libtufao.a</code> to <code>libtufao.lib</code>:</p> <pre><code>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 </code></pre> <p>But when I try to build this test project I get compiler error:</p> <blockquote> <p>undefined reference to `<em>imp</em>__ZN5Tufao9WebSocket13connectToHostERK12QHostAddresstRK10QByteArrayRKNS_7HeadersE' collect2.exe:-1:</p> <p>error: ld returned 1 exit status</p> </blockquote> <p>Can anyone help me?</p> <p>Regards</p> <p><strong>EDIT:</strong> Problem solved by adding all sources into my dest project and in <code>.pro</code> file I added <code>DEFINES += TUFAO_LIBRARY</code>. Now everything is compiling fine.</p>
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