Re: Unable to build world w/o clang on 11

On Tue, 11 Nov 2014 20:21:48 +0100 Dimitry Andric <dim_at_FreeBSD.org> wrote

> On 11 Nov 2014, at 20:04, Chris H <bsd-lists_at_bsdforge.com> wrote:
> ...
> > But sadly. blowing away ports, src, and obj. Then checking out
> > src r274382, and performing a buildworld. Although I got further.
> > it bombed at:
> > 
> > ===> usr.sbin/hyperv (all)
> > ===> usr.sbin/hyperv/tools (all)
> > cc  -O2 -pipe
> > -I/usr/src/usr.sbin/hyperv/tools/../../../sys/dev/hyperv/utiliti
> > es -std=gnu99 -fstack-protector -Wsystem-headers -Werror -Wall
> > -Wno-format-y2k -
> > W -Wno-unused-parameter -Wstrict-prototypes -Wmissing-prototypes
> > -Wpointer-arith
> > -Wreturn-type -Wcast-qual -Wwrite-strings -Wswitch -Wshadow
> > -Wunused-parameter -Wcast-align -Wchar-subscripts -Winline -Wnested-externs
> > -Wredundant-decls -Wold
> > -style-definition -Wno-pointer-sign   -c
> > /usr/src/usr.sbin/hyperv/tools/../../..
> > /contrib/hyperv/tools/hv_kvp_daemon.c
> > cc1: warnings being treated as errors
> >
> >
/usr/src/usr.sbin/hyperv/tools/../../../contrib/hyperv/tools/hv_kvp_daemon.c:
> > In
> > function 'kvp_get_ip_info':
> >
> >
/usr/src/usr.sbin/hyperv/tools/../../../contrib/hyperv/tools/hv_kvp_daemon.c:
> > 814 : warning: 'ip_buffer' may be used uninitialized in this function
> 
> Yep, this is another false positive from gcc.  I've mailed a proposed
> workaround to Xin Li, but for now, if you compile world and kernel with
> gcc, use NO_WERROR= and WERROR= in your make.conf.  Especially the
> kernel still needs a bunch of fixes to make it work with gcc again.
> 
> It's a pity the gcc tinderboxes have been taken offline.  Maybe this can
> be added to the FreeBSD Jenkins instance now?

Thank you *very* much, Dimitry. For the informative reply.
Yes. I agree, adding a task for Jenkins seems like a *very*
good idea.

Well, it looks like a real gamble not going with defaults,
for now. I guess attempts using gcc as base compiler is off the
table, for now.
This must really hit some of the other ARCHS pretty hard. I
can't imagine trying to develop under these circumstances.
Here's hoping for improvements in this area soon!

Thanks again, Dimitry.

--Chris
> 
> -Dimitry