BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  VC++8          BorlandTalk.com Forum Index -> C++ Builder (Non-Technical) View previous topic :: View next topic   Author Message Olivier Bertini Guest Posted: Thu Mar 23, 2006 7:03 pm    Post subject: VC++8 Hello, I already posted this question to the ms-compatibility newsgroup but got no answer. How to use a VC++8 c dll with BCB6 (or BDS2006 demo). The problem is that when I try to dynamically load the dll (Loadlibrary) I get the error message: --> Runtime error! Program: MyPath\MyApp.exe R6034 An application has made an attempt to load the C runtime library incorrectly. Please contact the application's support team for more information. <-- This seems to be related to a manifest file that must be embedded in the dll. I checked and the manifest is actually embedded in it. I suppose I must do something like embedding this manifest into my application (BCB6) too, but I don't know how. Is this the correct approach? If yes, how to do it? Regards, Olivier Back to top Clayton Arends Guest Posted: Fri Mar 24, 2006 7:03 am    Post subject: Re: VC++8 I haven't seen that particular error before. What is your code? - Clayton Back to top Olivier Bertini Guest Posted: Fri Mar 24, 2006 4:03 pm    Post subject: Re: VC++8 Clayton Arends a écrit : Quote: I haven't seen that particular error before. What is your code? This has nothing to do with my code. I suggest you have a look at http://www.codeproject.com/cpp/vcredists_x86.asp#Introduction if you intend to work with VC++8. Sadly the information on this site didn't work for me. I suppose this is because the app which call the dll must also have the manifest stuff. Olivier Back to top Andre Kaufmann Guest Posted: Fri Mar 24, 2006 5:03 pm    Post subject: Re: VC++8 Olivier Bertini wrote: Quote: Clayton Arends a écrit : I haven't seen that particular error before. What is your code? This has nothing to do with my code. I suggest you have a look at http://www.codeproject.com/cpp/vcredists_x86.asp#Introduction if you intend to work with VC++8. Sadly the information on this site didn't work for me. I suppose this is because the app which call the dll must also have the manifest stuff. Olivier Try to compile using the static runtime library. Project Settings - C/C++ - Code Generation - Runtime Library: Then instead "Multi-threaded DLL (/MD)" select "Multi-threaded (/MT)" Then you shouldn't be depended on the dynamic runtime library and therefore should not need a manifest file for a plain DLL, which doesn't use COM and COM isolation. You could also additionally try to disable the manifest file in the linker settings. Hope this helps. Andre Back to top Andre Kaufmann Guest Posted: Fri Mar 24, 2006 5:03 pm    Post subject: Re: VC++8 Andre Kaufmann wrote: Quote: Olivier Bertini wrote: Clayton Arends a écrit : I haven't seen that particular error before. What is your code? This has nothing to do with my code. I suggest you have a look at http://www.codeproject.com/cpp/vcredists_x86.asp#Introduction if you intend to work with VC++8. Sadly the information on this site didn't work for me. I suppose this is because the app which call the dll must also have the manifest stuff. Olivier Try to compile using the static runtime library. Project Settings - C/C++ - Code Generation - Runtime Library: Then instead "Multi-threaded DLL (/MD)" select "Multi-threaded (/MT)" Then you shouldn't be depended on the dynamic runtime library and therefore should not need a manifest file for a plain DLL, which doesn't use COM and COM isolation. You could also additionally try to disable the manifest file in the linker settings. Hope this helps. Andre This applies to the VC compiler settings only. It's not the fault of BDS and you cannot correct this behavior by adjusting some project settings in BDS. If you have not access to the VC sources and cannot rebuilt the DLL and are still have problems to load the DLL even if you have the .NET 2.0 runtime installed (should come with all required DLL's) or with the VC Runtime Library package installed then I think the project of the DLL has been a) Either built with a beta version b) Is misconfigured c) Depends on additional libraries (DLL's), configured in the manifest file. Andre Back to top Olivier Bertini Guest Posted: Fri Mar 24, 2006 7:03 pm    Post subject: Re: VC++8 Andre Kaufmann a écrit : Quote: This applies to the VC compiler settings only. It's not the fault of BDS and you cannot correct this behavior by adjusting some project settings in BDS. Of course it is not BDS's fault. It's MS new way of distributing dll. Quote: If you have not access to the VC sources and cannot rebuilt the DLL and are still have problems to load the DLL even if you have the .NET 2.0 runtime installed (should come with all required DLL's) or with the VC Runtime Library package installed then I think the project of the DLL has been a) Either built with a beta version Visual Studio C++ 2005 Express fresh download from Microsoft website. Quote: c) Depends on additional libraries (DLL's), configured in the manifest file. The dll in question is a plug-in for a BCB app. It uses BOOST 1.33.1 and a library for serving web pages. Both BOOST and the library have been compiled with VC++8 Express. Demo and sample run just fine. Some strange behavior: I extracted the embedded manifest from the myplugin.dll with ResHacker to a .res file. Then I added it to the BCB project and compiled. The program could not start because of an error in initialization. So I removed the res file and recompiled. Then it ran and loaded the plugin.dll properly!! But as soon as I change plugin.dll in VC it starts again to complain. Moreover when debugging the dll from VC, it doesn't load and say nothing?! Thanks for your help, Olivier Back to top Olivier Bertini Guest Posted: Fri Mar 24, 2006 7:03 pm    Post subject: Re: VC++8 Andre Kaufmann a écrit : Quote: Try to compile using the static runtime library. Project Settings - C/C++ - Code Generation - Runtime Library: Then instead "Multi-threaded DLL (/MD)" select "Multi-threaded (/MT)" I already tried this approach. Unfortunately I get some error messages like msvcrtd.lib(MSVCR80D.dll) : error LNK2005: _malloc already defined in LIBCMT.lib(malloc.obj). If I put msvcrtd.lib in the Ignore Specific library I get more errors If I put LIBCMT.lib in the Ignore Specific library it compiles fine but then still throw the error that CRT was not properly initialized. Olivier Back to top Olivier Bertini Guest Posted: Sat Mar 25, 2006 6:03 pm    Post subject: Re: VC++8 I found the problem to come from a library that was compiled with VC++8 but from the command line. It appears that the generated dlls did not contained the manifest resource. However the manifest file was generated as a separate file. The solution is to embed it using the command: mt /manifest lib.dll.manifest /outputresource:lib.dll;#2 Thanks to all of you who regularly help people. Your help is very appreciated. Olivier Bertini Back to top Hendrik Schober Guest Posted: Mon Mar 27, 2006 4:03 pm    Post subject: Re: VC++8 Olivier Bertini <olivier.bertini (AT) NOOSPAAAAMMMMMurbanet (DOT) ch> wrote: Quote: Andre Kaufmann a écrit : Try to compile using the static runtime library. Project Settings - C/C++ - Code Generation - Runtime Library: Then instead "Multi-threaded DLL (/MD)" select "Multi-threaded (/MT)" I already tried this approach. Unfortunately I get some error messages like msvcrtd.lib(MSVCR80D.dll) : error LNK2005: _malloc already defined in LIBCMT.lib(malloc.obj). That you get whenever you link to EXEs/DLLs/LIBs that use different RTLs in VC. You need to change this in all your VC projects. 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