From: Gilles DOT Depeyrot AT wanadoo DOT fr (Gilles Depeyrot) Subject: [HELP] Loading Mingw32 built DLLs into an MSVC application 19 May 1998 08:32:38 -0700 Message-ID: <199805181844.UAA18150.cygnus.gnu-win32@tamaya.wanadoo.fr> Mime-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" To: Hi everyone, This message follows one I sent 10 days ago (I've had the time to do lots of testing without reaching a solution). I have been trying to build DLLs with Mingw32. Browsing through the faq and different web sites, I have succeeded in building my relocatable DLL with Mingw32. Quickview on the Mingw32 built DLLs seems perfectly correct compared to quickview on the same DLLs built with MSVC (there is more information in the Mingw32 DLL and most noticeably the import and export sections which are only visible using dumpbin on MSVC built DLLs but are visible using quickview on the Mingw32 built DLLs). I can load my DLL into a small test application that contains just LoadLibrary and GetProcAddress whether the test application is compiled with Mingw32 or MSVC. I tried both main and WinMain and both C and C++ compilation: everything works fine with the small test application. However, I can't seem to load the DLL into the final MSVC compiled application. LoadLibrary returns NULL and GetLastError returns 0, 2 or 126... The final MSVC application is a big project (more than 200000 lines of code) which generates a 4 Mb application. I did some testing which gave me the following information: I added the test code right at the beginning of the application WinMain -> doesn't work I removed everything else from the WinMain (left just my test code in there) -> doesn't work I removed third party .obj and .lib files and the related source files -> doesn't work I removed an optional MFC application module (a substancial amount of unused ..obj files are linked into the final application but no MFC or third party code is linked in) leaving just Win32 application code -> doesn't work I removed a matherr trap function we link in -> doesn't work I removed everything else (except the WinMain with the test code and the resource files) -> it works ! Therefore, I suppose the following: the problem is not due to my project options the problem is not due to resource files the problem is not due to the third party code we link in the problem is not due to the MFC code we link in the problem MAY be due to the size of the application (4 Mb) the problem MAY be that the DLL does not relocate correctly Thanks for any ideas, Gilles ---------------------------------------------------------------------- Gilles Depeyrot Those who can do, those who can't simulate ! - For help on using this list (especially unsubscribing), send a message to "gnu-win32-request AT cygnus DOT com" with one line of text: "help".