DLL vs Static

[NuSkooler]

Hello,

First off thanks for wxWebConnect! We've experimented with using the old wxMozilla, our own wxMozillaXre, and lately wxWebKit -- wxWebConnect blows them all away!

On to my question:
Our product builds & uses wxWidgets as shared DLLs, how do I setup & compile wxWebConnect to output as a DLL and/or use the wxWidgets DLLs VS static libs?

I tried modifying the project files to use the vc_dll/ directories instead of vc_lib as well as defining WXUSINGDLL. This results in a bunch of errors like this:

Code: Select all

webcontrol.cpp(55) : error C2491: 'wxWebEvent::ms_classInfo' : definition of dllimport static data member not allowed

Any ideas?

[Ben]

Hello,

Did you try to declare the classes with WXEXPORT? I recommend comparing how this is done in wxAUI with wxWebConnect.

All the best,
Ben

[NuSkooler]

I've compared to wxAUI & got a little further but am still having issues. Here is what I've done:

webconnect project modified to create a DLL:

• Changed all class definitions to "class WXDLLIMPEXP_AUI theClassName"
• preprocessor defines: WXUSINGDLL and WXMAKINGDLL_AUI defined.

The combination of the two sets WXDLLIMPEXP to WXEXPORT, thus "class WXEXPORT theClassName". This works for creating a DLL.

testapp project modified in attempt to use webconnect.dll:

• preprocessor defines: WXUSINGDLL and WXUSINGDLL_AUI

This results in the following at build time:

Code: Select all

1>testapp.obj : error LNK2001: unresolved external symbol "protected: static struct wxEventTable const wxFrame::sm_eventTable" (?sm_eventTable@wxFrame@@1UwxEventTable@@B)
1>testapp.obj : error LNK2001: unresolved external symbol "class wxPoint const wxDefaultPosition" (?wxDefaultPosition@@3VwxPoint@@B)
1>testapp.obj : error LNK2001: unresolved external symbol "wchar_t const * const wxMessageBoxCaptionStr" (?wxMessageBoxCaptionStr@@3QB_WB)
1>testapp.obj : error LNK2001: unresolved external symbol "wchar_t const * const wxEmptyString" (?wxEmptyString@@3PB_WB)
1>testapp.obj : error LNK2001: unresolved external symbol "protected: static class wxAppConsole * wxAppConsole::ms_appInstance" (?ms_appInstance@wxAppConsole@@1PAV1@A)
1>testapp.obj : error LNK2019: unresolved external symbol "public: void __thiscall wxWebPreferences::SetIntPref(class wxString const &,int)" (?SetIntPref@wxWebPreferences@@QAEXABVwxString@@H@Z) referenced in function "public: __thiscall MyFrame::MyFrame(class wxWindow *,int,class wxString const &,class wxPoint const &,class wxSize const &,long)" (??0MyFrame@@QAE@PAVwxWindow@@HABVwxString@@ABVwxPoint@@ABVwxSize@@J@Z)
1>testapp.obj : error LNK2001: unresolved external symbol "class wxValidator const wxDefaultValidator" (?wxDefaultValidator@@3VwxValidator@@B)
1>testapp.obj : error LNK2001: unresolved external symbol "wchar_t const * const wxComboBoxNameStr" (?wxComboBoxNameStr@@3QB_WB)
1>testapp.obj : error LNK2001: unresolved external symbol "class wxSize const wxDefaultSize" (?wxDefaultSize@@3VwxSize@@B)
1>testapp.obj : error LNK2001: unresolved external symbol "wchar_t const * const wxStatusLineNameStr" (?wxStatusLineNameStr@@3QB_WB)
1>testapp.obj : error LNK2001: unresolved external symbol "wchar_t const * const wxFrameNameStr" (?wxFrameNameStr@@3QB_WB)
1>testapp.obj : error LNK2001: unresolved external symbol "wchar_t const * const wxFileDialogNameStr" (?wxFileDialogNameStr@@3QB_WB)
1>testapp.obj : error LNK2001: unresolved external symbol "public: static enum wxTextFileType const wxTextBuffer::typeDefault" (?typeDefault@wxTextBuffer@@2W4wxTextFileType@@B)
1>testapp.obj : error LNK2001: unresolved external symbol "protected: static class wxAppConsole * (__cdecl* wxAppConsole::ms_appInitFn)(void)" (?ms_appInitFn@wxAppConsole@@1P6APAV1@XZA)
1>testapp.obj : error LNK2001: unresolved external symbol "int const wxEVT_NULL" (?wxEVT_NULL@@3HB)
1>testapp.obj : error LNK2001: unresolved external symbol "int const wxEVT_WEB_DOMCONTENTLOADED" (?wxEVT_WEB_DOMCONTENTLOADED@@3HB)
1>testapp.obj : error LNK2001: unresolved external symbol "int const wxEVT_WEB_SHOULDHANDLECONTENT" (?wxEVT_WEB_SHOULDHANDLECONTENT@@3HB)
1>testapp.obj : error LNK2001: unresolved external symbol "int const wxEVT_WEB_INITDOWNLOAD" (?wxEVT_WEB_INITDOWNLOAD@@3HB)
1>testapp.obj : error LNK2001: unresolved external symbol "int const wxEVT_WEB_SHOWCONTEXTMENU" (?wxEVT_WEB_SHOWCONTEXTMENU@@3HB)
1>testapp.obj : error LNK2001: unresolved external symbol "int const wxEVT_WEB_TITLECHANGE" (?wxEVT_WEB_TITLECHANGE@@3HB)
1>testapp.obj : error LNK2001: unresolved external symbol "int const wxEVT_WEB_LOCATIONCHANGE" (?wxEVT_WEB_LOCATIONCHANGE@@3HB)
1>testapp.obj : error LNK2001: unresolved external symbol "int const wxEVT_WEB_STATECHANGE" (?wxEVT_WEB_STATECHANGE@@3HB)
1>testapp.obj : error LNK2001: unresolved external symbol "int const wxEVT_WEB_STATUSCHANGE" (?wxEVT_WEB_STATUSCHANGE@@3HB)
1>testapp.obj : error LNK2001: unresolved external symbol "int const wxEVT_WEB_STATUSTEXT" (?wxEVT_WEB_STATUSTEXT@@3HB)
1>testapp.obj : error LNK2001: unresolved external symbol "int const wxEVT_UPDATE_UI" (?wxEVT_UPDATE_UI@@3HB)
1>testapp.obj : error LNK2001: unresolved external symbol "int const wxEVT_COMMAND_MENU_SELECTED" (?wxEVT_COMMAND_MENU_SELECTED@@3HB)
1>testapp.obj : error LNK2001: unresolved external symbol "int const wxEVT_COMMAND_COMBOBOX_SELECTED" (?wxEVT_COMMAND_COMBOBOX_SELECTED@@3HB)
1>testapp.obj : error LNK2001: unresolved external symbol "int const wxEVT_COMMAND_TEXT_ENTER" (?wxEVT_COMMAND_TEXT_ENTER@@3HB)
1>testapp.obj : error LNK2001: unresolved external symbol "int const wxEVT_ERASE_BACKGROUND" (?wxEVT_ERASE_BACKGROUND@@3HB)
1>testapp.obj : error LNK2001: unresolved external symbol "int const wxEVT_SIZE" (?wxEVT_SIZE@@3HB)


Testapp is being linked against all of the proper wxWidgets libs as well as the new webconnect.lib (DLL version). I've build both 100% clean. I'm probably missing something obvious?

Thanks again for any additional information!

[affi]

got the same problem.

I then created a simple TestApp with customized settings and this one works.
You could try to delete the TestApp Projekt and recreate it.

[myersa]

Hello,

Before you read on, I have no solutions to offer, so if that's what you're looking for, read no further.

I've been tearing my hear out for a day and a half trying to get this to work as a DLL. There are literally hundreds of class definitions and forward declarations for which a macro must be added (e.g. WXDLLIMPEXP_AUI and WXDLLIMPEXP_FWD_AUI), and there are linker errors (unresolved external symbols to things like "wxEmptyString") that shouldn't even be there (yes, I triple-checked the include & linker paths and made sure WXUSINGDLL was defined).

Based on what I've seen from the sample app (which I DID get working by re-building my wxWidgets library as a static lib), the product is excellent, but I've never had such a difficult time trying to adapt something to the needs of my project (i.e. using wxWidgets as a DLL).

Please, consider making the next release flexible enough to work as a DLL or as a static library right out of the box - adding "Debug_DLL" and "Release_DLL" build configurations would be most welcome.