I'd hardly call a configuration option a hack. (I realise the procedure is different on Windows, but elsewhere it simply involves passing -Duse64bitall to Configure.)

In reply to Re^3: length of pack 'J' and Win64/Win32 C data type model, pointer length, DWORD_PTR by ikegami
in thread length of pack 'J' and Win64/Win32 C data type model, pointer length, DWORD_PTR by patcat88

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