Hello,

I am trying to create a simple dll containing some qt code.
I thought that this would be easy, but somehow I am getting a compiler error telling me:

1>------ Build started: Project: dll_test, Configuration: Debug Win32 ------
1>Compiling...
1>moc_qtestdll.cpp
1>qtestdll.cpp
1>Generating Code...
1>Linking...
1> Creating library ..\..\libs\dll_test.lib and object ..\..\libs\dll_test.exp
1>qtmaind.lib(qtmain_win.obj) : error LNK2019: unresolved external symbol _main referenced in function _WinMain@16
1>..\..\libs\dll_test.exe : fatal error LNK1120: 1 unresolved externals
1>Build log was saved at "file://c:\tmp\project\lab\dll_test\debug\BuildLog.htm"
1>dll_test - 2 error(s), 0 warning(s)
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========

It looks like that my Visual C++ compiler is trying to compile this as an apllication.

This is my code:

dll_test.pro

Qt Code: 
  1. TEMPLATE = lib
  2. CONFIG += dll qt thread
  3.  
  4. # DEFINES only for Windows
  5. win32 {
  6.       CONFIG(dll) {
  7.          DEFINES += BUILD_DLL
  8.       } 
  9. }
  10.  
  11. # Input
  12. HEADERS += src/qtestdll.h
  13. SOURCES += src/qtestdll.cpp
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qtestdll.h
Qt Code: 
  1. #ifndef QTTESTDLL_H
  2. #define QTTESTDLL_H
  3.  
  4. #ifdef BUILD_DLL
  5.    #define EXPORT_DLL Q_DECL_EXPORT  // for Windows
  6. #else
  7.    #define EXPORT_DLL
  8. #endif
  9.  
  10. #include <QtGui>
  11. #include <QObject>
  12.  
  13. class EXPORT_DLL myTestLib : public QObject {
  14. Q_OBJECT
  15. public:
  16.    myTestLib() {};
  17.    ~myTestLib(){};
  18.    void printOut();
  19. };
  20. #endif
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qtestdll.cpp
Qt Code: 
  1. #include "qtestdll.h"
  2.  
  3. void myTestLib::printOut() {
  4.    QMessageBox::information (
  5.       NULL,
  6.       QObject::tr("Yeahh"),
  7.       QObject::tr("This message box comes"
  8.                   " from my dynamic library") );
  9. }
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As usual I did qmake dll_test.pro and qmake -t vcapp to generate the Makefile and the Visual Studio project.

If anyone has an idea...