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Asked: 2026-05-10T19:34:36+00:00

I am trying to use native windows API with Qt using mingw toolset. There

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I am trying to use native windows API with Qt using mingw toolset. There are link problems with some functions. What happens? Is this a bug with mingw name mangling?

#ifdef Q_WS_WIN     HWND hwnd = QWidget::winId();     HDC hdcEMF  = CreateEnhMetaFile(NULL, NULL, NULL, NULL ) ;     Rectangle(hdcEMF,100,100,200,200);     HENHMETAFILE hemf = CloseEnhMetaFile(hdcEMF);     OpenClipboard(hwnd);     EmptyClipboard();     SetClipboardData(CF_ENHMETAFILE,hemf);     CloseClipboard(); #else

The errors:

undefined reference to `CreateEnhMetaFileW@16′

undefined reference to `Rectangle@20′

undefined reference to `CloseEnhMetaFile@4′

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1 Answer

  1. The functions CreateEnhMetaFileW() and CloseEnhMetaFile() are defined in the static library Gdi32.lib, so you have to make sure to link against that. Try adding -lgdi32 to the end of your command line you’re using to compile. If that doesn’t work, you might have to specify the full path to Gdi32.lib by adding -L/path/to/folder/containing/the/library -lgdi32 instead.

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