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| [A4] undefined reference to `WinMain@16' ONLY in Debug mode |
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Neil Roy
Member #2,229
April 2002
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I recently started work on an old game which works, but has a bug I am trying to track down. I'm using Allegro 4 with MinGW and CodeBlocks. I enabled debug mode, linked the appropriate alleg44-debug etc... the game compiles up just fine in normal (release) mode, but when I tell CodeBlocks to compile it in debug mode I get this error. I know normally this means I'm missing END_OF_MAIN() but in this case I am not. I would post my code but there is FAR too much of it. the end of my main looks like: } END_OF_MAIN() like I said, it compiles and runs fine when not in debug mode. The only difference between release and debug is it links the allegro debug library and I enable debug symbols. Otherwise, the rest of the settings are the same. Strange error, I didn't want to work on this again in the first place, but the bug causes my game to freeze up totally and I have to use task manager to shut it down, so I need to use debug mode and track this if possible. <sigh> Any help would be appreciated. --- |
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Matthew Leverton
Supreme Loser
January 1999
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Make sure the debug profile is also using the /subsystem:windows linker option. Edit: that's for MSVC. Similar thing might apply to you. Edit 2: Actually that doesn't make any sense since it is looking for WinMain but cannot find it. The related things would be:
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Neil Roy
Member #2,229
April 2002
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the MinGW32 command is "--subsystem,windows" by the way, didn't help, but could be useful to know in the future. I have END_OF_MAIN() properly, I don't use those other two. Like I said, it compiles just fine in release mode, but when I switch to debug mode I get that. Doesn't make any sense at all. I'll keep at it and let you know if I come up with something... --- |
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Matthew Leverton
Supreme Loser
January 1999
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You can easily see if it's an END_OF_MAIN problem by just hardcoding it: int __stdcall WinMain(void *hInst, void *hPrev, char *Cmd, int nShow) { return _WinMain((void *)_mangled_main, hInst, hPrev, Cmd, nShow); } Requires you to rename your "main" function to "_mangled_main". |
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Neil Roy
Member #2,229
April 2002
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Why would that be an END_OF_MAIN() problem if it compiles just fine when not in debug mode though? If it was an END_OF_MAIN() problem it should give me the same error regardless of which mode I compile it for. I'll try that out, but I'm certain that is not the problem. Same error... here's the exact error, perhaps this will shine more light on the problem: c:\users\neil\develop\codeblocks\mingw\bin\..\lib\gcc\mingw32\4.4.1\..\..\..\libmingw32.a(main.o):main.c|| undefined reference to `WinMain@16'| Wait a sec... I think I see the problem... where in hell is it getting a main.c from??? I don't have a main.c in my project. >=( <bangs head against wall> EDIT: okay, I solved the problem by deleting the DEBUG build options and recreating a new DEBUG build by copying the release version and renaming it DEBUG, then changing a few settings specifically to debugging and it works. I originally just created a debug build then done all the settings. Although they all LOOKED correct, obviously something was amiss... who knows... strange and I wish I knew what it was, but it works anyhow. It was some screwy compiler setting... --- |
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