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C program not linking to CRT calls memset() for unknown reasons

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Question

Sunday, November 9, 2014 10:28 PM

Hi,

I've set up Visual C++ 2008 to not use the CRT as described here: http://www.dreamincode.net/forums/topic/228780-microsoft-writing-c-applications-without-the-runtime-system/. For some reason I keep getting the error:

1>test.obj : error LNK2001: unresolved external symbol _memset
1>C:\test.exe : fatal error LNK1120: 1 unresolved externals

when trying to build the following code:

#include <windows.h>
#include <ddraw.h>

typedef HRESULT (WINAPI *DIRECTDRAWCREATE) (LPGUID, LPDIRECTDRAW*, IUnknown*);

void WinMainCRTStartup(void) {
  HMODULE hDDrawDLL;
  LPDIRECTDRAW lpDD;
  LPDIRECTDRAWSURFACE lpDDSPrimary;
  DIRECTDRAWCREATE DirectDrawCreate;
  DDSURFACEDESC ddsd = { 0 };

  hDDrawDLL = LoadLibrary(L"DDRAW.DLL");
  DirectDrawCreate = (DIRECTDRAWCREATE) GetProcAddress(hDDrawDLL, "DirectDrawCreate");

  DirectDrawCreate(NULL, &lpDD, NULL);
  lpDD->lpVtbl->SetCooperativeLevel(lpDD, NULL, DDSCL_NORMAL);

  ddsd.dwSize = sizeof ddsd;
  ddsd.dwFlags = DDSD_CAPS;
  ddsd.ddsCaps.dwCaps = DDSCAPS_PRIMARYSURFACE;

  lpDD->lpVtbl->CreateSurface(lpDD, &ddsd, &lpDDSPrimary, NULL);

  lpDDSPrimary->lpVtbl->Release(lpDDSPrimary);

  lpDD->lpVtbl->Release(lpDD);
  FreeLibrary(hDDrawDLL);

  ExitProcess(0);
}

It seems to be related to   DDSURFACEDESC ddsd = { 0 };  and     lpDD->lpVtbl->CreateSurface(lpDD, &ddsd, &lpDDSPrimary, NULL);  but I don't see what could be wrong. I hope that you're able to help me.

(I know that DD is deprecated but I need the ability to use overlays with source color keying)

All replies (1)

Monday, November 10, 2014 1:00 AM âś…Answered

I've set up Visual C++ 2008 to not use the CRT as described here: http://www.dreamincode.net/forums/topic/228780-microsoft-writing-c-applications-without-the-runtime-system/. For some reason I keep getting the error:

1>test.obj : error LNK2001: unresolved external symbol _memset
1>C:\test.exe : fatal error LNK1120: 1 unresolved externals

See if this old thread sheds any light:

MSVC++ 2005 automatically calling memset?
Archived Forums
Visual C++ Express Edition
https://social.msdn.microsoft.com/Forums/en-US/a51fe950-cd74-4133-8d84-1bc07b353bc2/msvc-2005-automatically-calling-memset?forum=Vsexpressvc

Note that this in a closed and archived forum. so you won't be able to post to that thread.

  • Wayne