Compiling src/osd/winui/screenshot.c...
src/osd/winui/columnedit.c: In function 'int DoExchangeItem(HWND, HWND, int)':
src/osd/winui/columnedit.c:43:7: error: variable 'b_res' set but not used [-Werr
or=unused-but-set-variable]
src/osd/winui/columnedit.c: In function 'void DoMoveItem(HWND, BOOL)':
src/osd/winui/columnedit.c:80:7: error: variable 'b_res' set but not used [-Werr
or=unused-but-set-variable]
src/osd/winui/columnedit.c: In function 'INT_PTR InternalColumnDialogProc(HWND,
UINT, WPARAM, LPARAM, int, int*, int*, const WCHAR* const*, void (*)(int*), void
 (*)(int*, int*), void (*)(int*, int*))':
src/osd/winui/columnedit.c:133:8: error: variable 'b_res' set but not used [-Wer
ror=unused-but-set-variable]
cc1plus.exe: all warnings being treated as errors
make: *** [obj/winui64/osd/winui/columnedit.o] Error 1
make: *** Waiting for unfinished jobs....
src/osd/winui/directories.c: In function 'void UpdateDirectoryList(HWND)':
src/osd/winui/directories.c:216:7: error: variable 'b_res' set but not used [-We
rror=unused-but-set-variable]
src/osd/winui/directories.c: In function 'BOOL Directories_OnInitDialog(HWND, HW
ND, LPARAM)':
src/osd/winui/directories.c:276:11: error: variable 'res' set but not used [-Wer
ror=unused-but-set-variable]
cc1plus.exe: all warnings being treated as errors
make: *** [obj/winui64/osd/winui/directories.o] Error 1
F:\mamesrc\MyBuild>