Error Definition Of Static Data Member Of Dllimport Class
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Cannot Define Dllimport Entity C++
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Definition Of Dllimport Function Not Allowed Visual Studio
them; it only takes a minute: Sign up C++ definition of dllimport static data member up vote 14 down vote favorite 4 I do have a class which looks like below: //.h file class __declspec(dllimport) MyClass { public: //stuff private: static int myInt; }; // .cpp file int MyClass::myInt = 0; I get the following compile error: error C2491: a function declared dllimport may not be defined 'MyClass::myInt' : definition of dllimport static data member not allowed what should I do? c++ dll static static-members share|improve this question asked Aug 16 '10 at 9:34 MBZ 5,6351867133 add a comment| 3 Answers 3 active oldest votes up vote 19 down vote accepted __declspec(dllimport) means that the current code is using the DLL that implements your class. The member functions and static data members are thus defined in the DLL, and defining them again in your program is an error. If you are trying to write the code for the DLL that implements this class (and thus defines the member functions and static data members) then you need to mark the class __declspec(dllexport) instead. It is common to use a macro for this. When building your DLL you define a macro BUILDING_MYDLL or similar. In your header for MyClass you then have: #ifdef BUILDING_MYDLL #define MYCLASS_DECLSPEC __declspec(dllexport) #else #define MYCLASS_DECLSPEC __declspec(dllimport) #endif class MYCLASS_DECLSPEC MyClass { ... }; This means that you can share the header between the DLL and the application that us
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Warning C4273: Inconsistent Dll Linkage
above to proceed. To start viewing messages, select the forum that you want to qt inconsistent dll linkage visit from the selection below. Welcome to Qt Centre. Qt Centre is a community site devoted to programming in C++ using __declspec(dllimport) the Qt framework. Over 90 percent of questions asked here gets answered. If you are looking for information about Qt related issue — register and post your question. You are currently viewing our boards as a http://stackoverflow.com/questions/3491990/c-definition-of-dllimport-static-data-member guest which gives you limited access to view most discussions and access our other features. By joining our free community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join our community today! If you have any problems with the registration process or your account login, please contact http://www.qtcentre.org/threads/11929-error-definition-of-static-member-of-dllimport-class us. + Reply to Thread Results 1 to 4 of 4 Thread: error definition of static member '...' of dllimport class Thread Tools Show Printable Version Subscribe to this Thread… Search Thread Advanced Search Display Linear Mode Switch to Hybrid Mode Switch to Threaded Mode 19th February 2008,01:00 #1 hvengel View Profile View Forum Posts View Blog Entries View Articles Intermediate user Join Date Mar 2006 Posts 74 Thanks 1 Qt products Platforms error definition of static member '...' of dllimport class I have ported my app to Qt4 and I am in the process of testing my build on Windows (I primarily work on Linux) and I am receiving errors that look like this: build\win32\libqtlcmswidgets\moc_lprofgauge.cc:81: error: definition of static data member 'LProfGauge::staticMetaObject' of dllimport'd class As you can see it is complaining about something in a moc file being declared as - well I am not sure what this means. The object is question is a custom widget that is in a static library (not in a DLL) and it appears that moc is generating incorrect code that the compiler is chocking on. This same static library contains other custom widgets (6 in total) and all of the hand written code for the custom widgets it compiling without any error
error: definition of static data member '%s' of dllimport'd class From: "Aleksei Andevis" https://gcc.gnu.org/ml/gcc-help/2004-02/msg00021.html