[prev in list] [next in list] [prev in thread] [next in thread] 

List:       cfe-dev
Subject:    Re: [cfe-dev] Clang/LLVM OpenMP program not spawning threads
From:       cbergstrom () pathscale ! com
Date:       2015-07-28 23:17:11
Message-ID: 20150728231711.5808207.6204.28500 () pathscale ! com
[Download RAW message or body]

By default he meant vs gomp and not just always on I think. For that it's absolutely \
not too late. Having a broken -fopenmp is just shameful

  Original Message  
From: andreybokhanko@gmail.com
Sent: Wednesday, July 29, 2015 05:41
To: Jack Howarth
Cc: cfe-dev; Jaime Arteaga
Subject: Re: [cfe-dev] Clang/LLVM OpenMP program not spawning threads

Jack,

Here is what 3.7 release notes \
(http://llvm.org/viewvc/llvm-project/cfe/branches/release_37/docs/ReleaseNotes.rst?r1=242225&r2=243164) \
say at the moment:

"OpenMP 3.1 is fully supported, but disabled by default. To enable it, please use \
``-fopenmp=libomp`` command line option."

IMHO, this is the best description we can provide. If you believe it can be improved, \
please submit your changes.

As for enabling libomp by default, Hans is right -- it's definitely too late for 3.7.

Yours,
Andrey

Отправлено с iPad

> 28 июля 2015 г., в 20:44, Jack Howarth <howarth.mailing.lists@gmail.com> \
> написал(а): 
> Hans,
> If we miss the 3.7.0 release, the fact that the LLVM OpenMP
> library is defaulted off in the 3.7.0 release should be clearly stated
> on the first mention of OpenMP library support in the release notes.
> We should also apologize for this suboptimal situation and promise to
> remedy it in the 3.7.1 release. Frankly admitting this defect in the
> 3.7.0 release might at least mitigate the amount of needless traffic
> on the mailing lists from users befuddled by this unexpected
> *feature*.
> Jack
> 
> > On Tue, Jul 28, 2015 at 12:59 PM, Hans Wennborg <hans@chromium.org> wrote:
> > > On Tue, Jul 28, 2015 at 7:11 AM, Hal Finkel <hfinkel@anl.gov> wrote:
> > > ----- Original Message -----
> > > > From: "David Chisnall" <David.Chisnall@cl.cam.ac.uk>
> > > > To: "Anton Korobeynikov" <anton@korobeynikov.info>
> > > > Cc: "Jaime Arteaga" <jandres742@gmail.com>, "cfe-dev" <cfe-dev@cs.uiuc.edu>
> > > > Sent: Tuesday, July 28, 2015 6:18:51 AM
> > > > Subject: Re: [cfe-dev] Clang/LLVM OpenMP program not spawning threads
> > > > 
> > > > On 28 Jul 2015, at 12:13, Anton Korobeynikov
> > > > <anton@korobeynikov.info> wrote:
> > > > > 
> > > > > Probably for 3.7 we'd need to issue a warning / error for -fopenmp
> > > > > w/o libomp.
> > > > 
> > > > And make everyone using OpenMP modify their build systems for a
> > > > single release of clang, when we could just make -fopenmp do the
> > > > right thing?
> > > 
> > > I agree that this would be quite unfortunate. It took some time to have a CMake \
> > > build system for the runtime library that everyone has been satisfied with. I'm \
> > > under the impression that we could change the default at this point, but I'm \
> > > not sure what that would require in terms of the release cycle. I've cc'd \
> > > Chandler, as he's been driving the project-level QoI requirements for this, and \
> > > Hans for the obvious reason ;)
> > 
> > As for the release cycle, I'd still be willing to take a merge for
> > this, but not for much longer. I'm planning to cut RC2 this week (late
> > Wednesday, or Thursday) and after that it's bug fixes only. The
> > question of merging is still very hypothetical though, as there hasn't
> > been any change on trunk that I'm aware of.
> > 
> > - Hans
> > 
> > _______________________________________________
> > cfe-dev mailing list
> > cfe-dev@cs.uiuc.edu
> > http://lists.cs.uiuc.edu/mailman/listinfo/cfe-dev
> 
> _______________________________________________
> cfe-dev mailing list
> cfe-dev@cs.uiuc.edu
> http://lists.cs.uiuc.edu/mailman/listinfo/cfe-dev

_______________________________________________
cfe-dev mailing list
cfe-dev@cs.uiuc.edu
http://lists.cs.uiuc.edu/mailman/listinfo/cfe-dev

_______________________________________________
cfe-dev mailing list
cfe-dev@cs.uiuc.edu
http://lists.cs.uiuc.edu/mailman/listinfo/cfe-dev


[prev in list] [next in list] [prev in thread] [next in thread]