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POqt add path for 3rd party header and libraries
 

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    <p>I am using qt and developing a desktop app that will run under win xp/vista.</p> <p>I have a 3rd party library UserAgentLib (static, and shared). But I am not sure how to link in qt creator. </p> <p>I have opened the *.pro file and added my library and header path. The library is called UserAgentLib and the header file is called UserAgentLib.h</p> <pre><code>TARGET = Dialer TEMPLATE = app LIBS += D:\Projects\qtDialer\tools\lib\UserAgentLib INCLUDEPATH += D:\Projects\qtDialer\tools\inc SOURCES += main.cpp\ catdialer.cpp HEADERS += catdialer.h FORMS += catdialer.ui </code></pre> <p>I think it does find the header file, as I get about 100 errors for declarations in the UserAgentLib.h file. However, I don't think it is linking with the library.</p> <p>Many thanks for any suggestions,</p> <p>======================</p> <p>I have create a very simple library in VS C++ 2008. Here is the code for the header and source file. Header:</p> <pre><code>// mathslibrary.hpp int add_numbers(const int a, const int b); </code></pre> <p>Source:</p> <pre><code>// mathslibrary.cpp #include "mathslibrary.hpp" int add_numbers(const int a, const int b) { return a + b; } </code></pre> <p>I have compiled this into a library. And tested by linking with a WIN32 console application in VS 2008. The library worked as expected.</p> <p>Now when I try and link with qt.</p> <pre><code>#include &lt;QtCore/QCoreApplication&gt; #include &lt;iostream&gt; #include "mathslibrary.hpp" int main(int argc, char *argv[]) { QCoreApplication a(argc, argv); std::cout &lt;&lt; "add numbers 40 + 60 = " &lt;&lt; add_numbers(40, 60) &lt;&lt; std::endl; return a.exec(); } </code></pre> <p>This is my qmake file:</p> <pre><code>QT -= gui TARGET = testlibrary CONFIG += console CONFIG -= app_bundle TEMPLATE = app LIBS = D:\Projects\TestLibrary\mathsLibrary\Debug\mathsLibrary.lib INCLUDEPATH = D:\Projects\TestLibrary\mathsLibrary\ SOURCES += main.cpp </code></pre> <p>These are the errors I get when I try and build:</p> <p>c:/Qt/mingw/bin/../lib/gcc/mingw32/3.4.5/../../../libmingw32.a(main.o):main.c::-1: error: undefined reference to `WinMain@16'</p> <p>:-1: error: collect2: ld returned 1 exit status</p> <p>And these are the compile issues:</p> <p>Running build steps for project testlibrary...</p> <p>Creating gdb macros library...</p> <p>Configuration unchanged, skipping QMake step.</p> <p>Starting: C:/Qt/mingw/bin/mingw32-make.exe debug -w </p> <p>mingw32-make: Entering directory `D:/Projects/TestQTLibrary/testlibrary'</p> <p>C:/Qt/mingw/bin/mingw32-make -f Makefile.Debug mingw32-make[1]: Entering directory `D:/Projects/TestQTLibrary/testlibrary'</p> <p>g++ -enable-stdcall-fixup -Wl,-enable-auto-import -Wl,-enable-runtime-pseudo-reloc -Wl,-subsystem,console -mthreads -Wl -o debug\testlibrary.exe -L"c:\Qt\qt\lib" </p> <p>D:\Projects\TestLibrary\mathsLibrary\Debug\mathsLibrary.lib -lQtCored4 mingw32-make[1]: Leaving directory `D:/Projects/TestQTLibrary/testlibrary'</p> <p>mingw32-make: Leaving directory `D:/Projects/TestQTLibrary/testlibrary'</p> <p>c:/Qt/mingw/bin/../lib/gcc/mingw32/3.4.5/../../../libmingw32.a(main.o):main.c:</p> <p>(.text+0x104): undefined reference to `WinMain@16' collect2: ld returned 1 exit status mingw32-make[1]: <strong>* [debug\testlibrary.exe] Error 1 mingw32-make: *</strong> [debug] Error 2 Exited with code 2. Error while building project testlibrary When executing build step 'Make'</p> <p>Many thanks for any advice,</p>
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