Created attachment 220280 [details]
unbreak make makesum with STAGING for release candidates
But it still fail with error:
server/fd.c: In function 'open_fd':
server/fd.c:1986:18: error: 'O_SYMLINK' undeclared (first use in this function)
1986 | flags |= O_SYMLINK;
server/fd.c:1986:18: note: each undeclared identifier is reported only once for each function it appears in
gmake: *** [Makefile:159599: server/fd.o] Error 1
#if !defined(O_SYMLINK) && defined(O_PATH)
# define O_SYMLINK (O_NOFOLLOW | O_PATH)
Can't find definition of the O_PATH.
Thanks for the patch.
For any issues with Wine Staging, please report those upstream; that's
really the best way.
Note the STAGING option is already labeled "experimental"; I'll be adding
"unsupported" to make that clear.
I devised a patch for the breakage you observed and reported the issue and
that patch upstream: https://bugs.winehq.org/show_bug.cgi?id=50255 .
You can expect an update of the port in the coming days.
A commit references this bug:
Date: Mon Dec 7 10:03:03 UTC 2020
New revision: 557223
Adjust the download of the Staging patchset to the Wine 6.0 RC1 release
and hence re-enable it. 
Temporarily include a patch of mine to address a build breakage with
that patchset, files/extrapatch-staging-server-fd.c.
Update the description for the STAGING option and explicitly label it
PR: 251606 
I have also reached out to the Wine Staging maintainers asking to follow
the same convention as Wine itself as they label their downloads (which
would have avoided the need to adjust DISTVERSION).