MSVC amd64
'...\dll\win32\winmm\midimap\midimap.c(474): warning C4133: 'function': incompatible types - from 'LPDWORD' to 'DWORD_PTR *''
Import missed parts of
29b00e1a8c
Addendum to b40e7f0 (r47900).
CORE-7538
There is no need to compile our DLLs as shared libraries since we are
managing symbols exports and imports through spec files.
On my system, this reduces the configure-time by a factor of two.